Handling CheckedListBox ItemCheck event in C#

Common problem handling ItemCheck event in CheckedListBox control is the fact that when the event is fired the object's state change is not finalized.If within the ItemCheck event handling function we try to get the CheckedListBox item's check state using the most common methods like getting collection of all checked items
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2015/11/19 10:16

C# How to Modify DataSet Connection Strings at Runtime?

Detailed instructions by Paul Keister in his excellent article Adaptive Connection Strings for Windows Forms Applications
In brief
the connection string property is set read only in the Settings.Designer.cs class:
public string MyAppConnectionString {
   get {
            return ((string)(this["MyAppConnectionString"]));
         }
}
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2015/10/19 11:07

Create application log file in C# / Write to File example

Application log file example 
private string logFile = "full path and file name (C:\\temp\\MyApplicationLog.txt)";
...
WriteToLogFile("your application message", logFile); // use any time to add record to the log file
...
public void WriteToLogFile(string strMessage, string outputFile)
{
   string line = DateTime.Now.ToString() + " | ";
   line += strMessage;
   FileStream fs = new FileStream(outputFile, FileMode.Append, FileAccess.Write, FileShare.None);
   StreamWriter swFromFileStream = new StreamWriter(fs);
   swFromFileStream.WriteLine(line);
   swFromFileStream.Flush();
   swFromFileStream.Close();
}

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2014/10/19 08:55

C# Is the Logged User a member of specific Windows Domain Group?

C sharp code
using System.DirectoryServices.AccountManagement;
string userName = SystemInformation.UserName;
string UDN = SystemInformation.UserDomainName;
string domainUser = UDN + "\\" + userName;
PrincipalContext pc = new PrincipalContext(ContextType.Domain);
UserPrincipal user = UserPrincipal.FindByIdentity(pc, IdentityType.SamAccountName, domainUser);
GroupPrincipal group = GroupPrincipal.FindByIdentity(pc, "Domain_Group_Name");
bool is_member = user.IsMemberOf(group);
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2013/10/19 11:10

DataGridView add row - C#

Considering DataGridView with 3 text columns defined. 
string[] row = new string[] { "column1_content", "column2_content", "column3_content" };
DataGridView1.Rows.Add(row);


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2012/10/19 09:18

DataGridView copy to clipboard

To copy the content of DataGridView cells to clipboard using MouseClick function                                                       
private void DataGridView1_MouseClick(object sender, MouseEventArgs e)
{
   DataGridView1.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableWithoutHeaderText;
   DataGridView1.SelectAll();
   Clipboard.SetDataObject(DataGridView1.GetClipboardContent());
}

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2012/10/19 09:15
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