ValueChanging事件是表格控件中经常使用到的事件，当单元格值发生改变时该事件将会被触发，通过该事件开发人员可以进行相应的操作，如数据验证、提示、更新等，这篇文章主要是讲Xceed Grid For .NET表格控件中ValueChanging事件是如何使用的，具体可以参考下面的代码：

 

using Xceed.Grid;

 

foreach( Cell cell in grid.DataRowTemplate.Cells )

{

  cell.ValueChanging += new ValueChangingEventHandler( this.cell_ValueChanging );

}

 

// This method will handle the ValueChanging events that are raised.

private void cell_ValueChanging( object sender, ValueChangingEventArgs e )

{

  try

  {

    if( ( e.NewValue is string ) && ( ( string )e.NewValue == "Hello" ) )

    {

      e.Cancel = true;

    }

  }

  catch( Exception exception )

  {

    MessageBox.Show( exception.ToString() );

  }

}

 

// If you no longer wish to handle the ValueChanging events that are raised,

// you can unsubscribe from the event notification by doing the following:

cell.ValueChanging -= new ValueChangingEventHandler( this.cell_ValueChanging );