Last week I showed you how to read an XML file, load it to a DataSet and assign those values into a GridView. Today I’ll show you how you can read an XML file using the XmlDataSource object. Let’s assume that we have an XML file called Symbols.xml in our App_Data folder that contains the following […]
Month: March 2008
March 27, 2008
keithrull
Last week I showed you ways on how to read text files. This time around we will be looking at how to load XML files into a DataSet. Let’s assume that we have a file called Symbols.xml which contains some XML data.
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<SPAN style="FONT-SIZE: 11px; COLOR: black; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent"><FONT color=#ff0000><?xml version=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"1.0"</SPAN> encoding=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"utf-8"</SPAN> ?> <Symbols> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"ATT"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"AT&amp;T"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"MSFT"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Microsoft"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"GOOG"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Google"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"CSCO"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Cisco"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"IP"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"International Paper Co."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"MF"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"MF Global"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Q"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Qwest Communications International Inc."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"BMC"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"BMC Software Inc."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"WCI"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"WCI Communities Inc."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"SPY"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"SDRs"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"LEH"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Lehman Brothers Holdings Inc."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"XLF"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Financial Select Sector SPDR"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"QQQQ"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"PowerShares QQQ TR 1"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"IWM"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"IShare Rus 2000 INDX"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"GE"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"General Electric Co."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"MER"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Merrill Lynch Co., Inc."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"BAC"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Bank of America Corporation"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"INTC"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Intel Corp"</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"F"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Ford Motor Co."</SPAN>></Symbol> <Symbol ExecutionSymbol=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"QID"</SPAN> Name=<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"UltraShort QQQ ProShares"</SPAN>></Symbol> </Symbols></FONT></SPAN> |
And you want to load that data into a DataSet and display it to a […]
March 19, 2008
keithrull
Sample 3 is similar to Sample 1 and and Sample 2 but it uses the File.ReadAllText method which reads the content of the whole file instead of reading the data line by line or reading the data and putting the values into a string[]. [C# Version]
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<SPAN style="FONT-SIZE: 11px; COLOR: black; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent"><SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">using</SPAN> System; <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">using</SPAN> System.IO; <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">namespace</SPAN> KeithRull.ReadMyFile { <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">class</SPAN> Program { <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">static</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">void</SPAN> Main(<SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN>[] args) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//the filename of the file to read</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN> xmlFilename <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Symbols.xml"</SPAN>; <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//validate if the file exist</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">if</SPAN> (File.Exists(xmlFilename)) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//read the contents of the file</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN> fileContent <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> File.ReadAllText(xmlFilename); <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//display the output in the screen</SPAN> Console.WriteLine(fileContent); } <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">else</SPAN> { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//notify that the file was not found</SPAN> Console.WriteLine(<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"File not found!"</SPAN>); } <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//pause and wait for the user.</SPAN> Console.ReadLine(); } } }</SPAN> |
[VB.NET Version]
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<SPAN style="FONT-SIZE: 11px; COLOR: black; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent"><SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Imports</SPAN> System <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Imports</SPAN> System.IO <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Namespace</SPAN> KeithRull.ReadMyFile <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Class</SPAN> Program <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Private</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Shared</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Sub</SPAN> Main(<SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">ByVal</SPAN> args <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">As</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">String</SPAN>()) <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'the filename of the file to read </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Dim</SPAN> xmlFilename <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">As</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">String</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Symbols.xml"</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'validate if the file exist </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">If</SPAN> File.Exists(xmlFilename) <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Then</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'read the contents of the file </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Dim</SPAN> fileContent <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">As</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">String</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> File.ReadAllText(xmlFilename) <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'display the output in the screen </SPAN> Console.WriteLine(fileContent) <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Else</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'notify that the file was not found </SPAN> Console.WriteLine(<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"File not found!"</SPAN>) <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">If</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'pause and wait for the user. </SPAN> Console.ReadLine() <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Sub</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Class</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Namespace</SPAN> </SPAN> |
March 19, 2008
keithrull
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<SPAN style="FONT-SIZE: 11px; COLOR: black; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent"></SPAN><FONT face=Verdana>Sample demonstrates how to use the File.ReadAllLines technique </FONT> |
[C# Version]
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<SPAN style="FONT-SIZE: 11px; COLOR: black; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent"><SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">using</SPAN> System; <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">using</SPAN> System.IO; <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">namespace</SPAN> KeithRull.ReadMyFile { <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">class</SPAN> Program { <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">static</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">void</SPAN> Main(<SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN>[] args) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//the filename of the file to read</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN> xmlFilename <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Symbols.xml"</SPAN>; <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//validate if the file exist</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">if</SPAN> (File.Exists(xmlFilename)) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//read the contents of the file</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN>[] fileContent <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> File.ReadAllLines(xmlFilename); <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//iterate for each line item in our file</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">foreach</SPAN> (<SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN> lineItem <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">in</SPAN> fileContent) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//display the output in the screen</SPAN> Console.WriteLine(lineItem); } } <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">else</SPAN> { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//notify that the file was not found</SPAN> Console.WriteLine(<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"File not found!"</SPAN>); } <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//pause and wait for the user.</SPAN> Console.ReadLine(); } } }</SPAN> |
[VB.NET Version] Imports System Imports System.IO Namespace KeithRull.ReadMyFile Class Program Private Shared Sub Main(ByVal args As String()) ‘the filename of the file to read Dim xmlFilename As String = “Symbols.xml” ‘validate if the file exist If File.Exists(xmlFilename) Then ‘read the contents of the file […]
March 19, 2008
keithrull
Sample 1 demonstrates how to use the StreamReader technique when reading the contents of a file [C# Version]
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<SPAN style="FONT-SIZE: 11px; COLOR: black; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent"><SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">using</SPAN> System; <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">using</SPAN> System.IO; <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">namespace</SPAN> KeithRull.ReadMyFile { <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">class</SPAN> Program { <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">static</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">void</SPAN> Main(<SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN>[] args) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//the filename of the file to read</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN> xmlFilename <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Symbols.xml"</SPAN>; <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//validate if the file exist</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">if</SPAN> (File.Exists(xmlFilename)) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//create a new StreamReader object tha would read the file</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">using</SPAN> (StreamReader sReader <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">new</SPAN> StreamReader(xmlFilename)) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//create a string object that would hold the</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//value of each line in our file</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">string</SPAN> line <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> String.Empty; <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//iterate for each line item in our file</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">while</SPAN> ((line <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> sReader.ReadLine()) !<SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">null</SPAN>) { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//display the output in the screen</SPAN> Console.WriteLine(line); } } } <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">else</SPAN> { <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//notify that the file was not found</SPAN> Console.WriteLine(<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"File not found!"</SPAN>); } <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">//pause and wait for the user.</SPAN> Console.ReadLine(); } } }</SPAN> |
[VB.NET Version]
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<SPAN style="FONT-SIZE: 11px; COLOR: black; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent"><SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Imports</SPAN> System <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Imports</SPAN> System.IO <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Namespace</SPAN> KeithRull.ReadMyFile <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Class</SPAN> Program <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Private</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Shared</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Sub</SPAN> Main(<SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">ByVal</SPAN> args <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">As</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">String</SPAN>()) <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'the filename of the file to read </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Dim</SPAN> xmlFilename <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">As</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">String</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"Symbols.xml"</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'validate if the file exist </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">If</SPAN> File.Exists(xmlFilename) <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Then</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'create a new StreamReader object tha would read the file </SPAN> Using sReader <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">As</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">New</SPAN> StreamReader(xmlFilename) <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'create a string object that would hold the </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'value of each line in our file </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Dim</SPAN> line <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">As</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">String</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> [<SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">String</SPAN>].Empty <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'iterate for each line item in our file </SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">While</SPAN> (line <SPAN style="FONT-SIZE: 11px; COLOR: red; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">=</SPAN> sReader.ReadLine()) IsNot <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Nothing</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'display the output in the screen </SPAN> Console.WriteLine(line) <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">While</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> Using <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Else</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'notify that the file was not found </SPAN> Console.WriteLine(<SPAN style="FONT-SIZE: 11px; COLOR: #666666; FONT-FAMILY: Courier New; BACKGROUND-COLOR: #e4e4e4">"File not found!"</SPAN>) <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">If</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: green; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">'pause and wait for the user. </SPAN> Console.ReadLine() <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Sub</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Class</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">End</SPAN> <SPAN style="FONT-SIZE: 11px; COLOR: blue; FONT-FAMILY: Courier New; BACKGROUND-COLOR: transparent">Namespace</SPAN> </SPAN> |
March 14, 2008
keithrull
I saw this on the news this morning and at first i thought this guys are some sort terrorist.. I was surprised to find out that these guys are actually “Real-Life Super Heroes” living in my area. Interesting.
March 12, 2008
keithrull
I love being busy. I do. I love working and building applications. I love making sure that what I build is a high quality application that has the ‘Wow’ factor stamped all over it. I guess it’s just my nature to enjoy work and build stuff. I love building stuff. I do. Being busy makes me feel […]
Defy All Challenges: The .NET Developer Roadshow (Philippines)
All about Keith ,Tech News and IssuesMarch 7, 2008
keithrull
Microsoft Philippines is conducting an event for developers called “Defy All Challenges: The .NET Developer Roadshow” on March 26, 2008 at SM Megamall Cinema 4, Ortigas Center, Mandaluyong City, Philippines. I think this is going to be a great event! I’ve already talked to few developers and they are definetely excited although some raise concerns […]
March 5, 2008
keithrull
My wife and I went to the Heroes Happen {here} event in Los Angeles, CA last month and boy, it was a blast! The event was a fullhouse with hundreds of developers and IT professionals attending this big day. My wife took some photos of me at the event during idle time and this is what came up. […]