Disable column in Gridview

                                            
                                                    
                                                        
                                                           '">
 
                                                        
                                                    
                                                
                                        

protected void grdPlanning_RowDataBound(object sender, GridViewRowEventArgs e)
{
// Check if the current row is a data row
if (e.Row.RowType == DataControlRowType.DataRow)
{
// Find the TextBox control for SessionDate in the current row
TextBox txtSessionDate = (TextBox)e.Row.FindControl("txtSessionDate");

    // Get the value of the column that you want to check (replace "ColumnName" with the actual name of the column)
    string columnValue = DataBinder.Eval(e.Row.DataItem, "ColumnName").ToString();
    
    // Check if the value of the column is "D" or "S" (disable the textbox if true)
    if (columnValue == "D" || columnValue == "S")
    {
        txtSessionDate.Enabled = false;
    }
    else // if the value of the column is not "D" or "S" (enable the textbox)
    {
        txtSessionDate.Enabled = true;
    }
}
}

you can also test this

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You can achieve this by handling the RowDataBound event of the GridView in your code-behind file. In this event, you can check the value of the column and disable the SessionDate TextBox accordingly.

Here's some sample code that demonstrates how to do this:

protected void grdPlanning_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        TextBox txtSessionDate = (TextBox)e.Row.FindControl("txtSessionDate");
        string columnValue = DataBinder.Eval(e.Row.DataItem, "ColumnName").ToString(); // Replace "ColumnName" with the actual name of your column

        if (columnValue == "D" || columnValue == "S")
        {
            txtSessionDate.Enabled = false;
        }
    }
}

Make sure to replace "ColumnName" with the actual name of the column in your GridView that contains the value you want to check.

Thanks