BUG: The original data appears in the DataGrid control although you have removed the data from the DataSet object (812919)

MORE INFORMATION

Steps to reproduce the behavior

1. In Microsoft Visual Studio .NET or in Microsoft Visual Studio 2005, use Visual Basic .NET, Visual Basic 2005, Visual C# 2005, or Visual C# .NET to create a new Windows Application project. By default, Form1 is created.
2. Add a DataGrid control to Form1.
   Note By default, the DataGrid control does not appear in Visual Studio 2005 toolbox. To obtain a DataGrid control, click Choose Toolbox Items on the Tools menu, click to select DataGrid on the .NET Framework Components tab, click Reset, and then click OK.
3. Add a Button object to Form1. By default, the Button1 object is created.
4. In design view, double-click Form1 to open the code for the Form1_Load event.
5. Add the following code before the Form1_Load event code to create a DataSet object.

   Visual Basic .NET code

       ' Create a data source.
       Private myDataSet As DataSet = New DataSet

   Visual C# .NET code

         // Create a data source.
         private DataSet myDataSet = new DataSet();

6. Replace the Form1_Load event code with the following code.

   Visual Basic .NET code

       Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
           ' Add a DataTable object to the DataSet object.
           myDataSet.Tables.Add("MyTable")
           myDataSet.Tables(0).Columns.Add("OriginalColumn")
           myDataSet.Tables(0).Rows.Add(New Object() {"Original Data"})
   
           ' Bind the DataGrid control to the data source.
           DataGrid1.SetDataBinding(myDataSet, "MyTable")
       End Sub

   Visual C# .NET code

      private void Form1_Load(object sender, System.EventArgs e)
      {
        // Add a DataTable object to the DataSet object.
        myDataSet.Tables.Add("MyTable");
        myDataSet.Tables[0].Columns.Add("OriginalColumn");
        myDataSet.Tables[0].Rows.Add(new Object[] {"Original Data"});
   
        // Bind the DataGrid control to the data source.
        dataGrid1.SetDataBinding(myDataSet, "MyTable");
      }

7. In Solution Explorer, right-click Form1, and then click View Designer.
8. In design view, double-click the Button1 object to add code for the Button1_Click event. Replace the code for the Button1_Click event with the following code.

   Visual Basic .NET code

       Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
           ' Remove the DataTable object from the data source.
           myDataSet.Tables.Clear()
          
          ' Add a DataTable object to the DataSet object.
           myDataSet.Tables.Add("MyTable")
           myDataSet.Tables(0).Columns.Add("NewColumn")
           myDataSet.Tables(0).Rows.Add(New Object() {"New Data"})
   
           'DataGrid1.DataSource = myDataSet.Tables("MyTable")
           DataGrid1.SetDataBinding(myDataSet, "MyTable")
       End Sub

   Visual C# .NET code

      private void button1_Click(object sender, System.EventArgs e)
      {
         // Remove the DataTable object from the data source.
         myDataSet.Tables.Clear();
      
         // Add a DataTable object to the DataSet object.
         myDataSet.Tables.Add("MyTable");
         myDataSet.Tables[0].Columns.Add("NewColumn");
         myDataSet.Tables[0].Rows.Add(new Object[] {"New Data"});
     
         // Bind the DataGrid control to the data source.
         dataGrid1.SetDataBinding(myDataSet, "MyTable");		
      }

9. On the Debug menu, click Start to run the application.
10. Click Button1. Notice that the original value appears in the DataGrid control.