Asp.Net 之 获取GridView行的DataKeys

1、后台任意一个位置获取GridView行的主键值

foreach (GridViewRow row in GridView1.Rows)
{
    string order_Id=this.GridView1.DataKeys[row.RowIndex]["orders_Id"].ToString();
}

2、RowDataBound方法中，在 GridView_RowDataBound中获取主键的值

protected void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    int index = GridView.DataKeys[e.Row.RowIndex].Value;
}

3、其次就是删除事件，在 GridView_RowDeleting中获取主键的值

protected void GridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
 {
    int index = GridView1.DataKeys[e.RowIndex].Value;
 }

4、分页事件，在 GridView_PageIndexChanging中获取主键的值

protected void GridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
 {
    int index = GridView.DataKeys[e.NewPageIndex].Value;
 }

5、行命令事件，在 GridView_RowCommand中获取主键的值：

protected void GridView_RowCommand(object sender, GridViewCommandEventArgs e)
 {
       int index = GridView.DataKeys[Convert.ToInt32(e.CommandArgument)].Value;
 }

或

GridViewRow row= ((GridViewRow)(((LinkButton)(e.CommandSource)).Parent.Parent)); 
int id=Convert.ToInt32(GridView.DataKeys[row.RowIndex].Value); 

6、行编辑事件，在 GridView_RowEditing中获取主键的值

protected void GridView_RowEditing(object sender, GridViewEditEventArgs e)
 {
     int index = GridView.DataKeys[e.NewEditIndex].Value;
 }

7、行更新事件，在 GridView_RowUpdating中获取主键的值

protected void GridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
 {
     int index = GridView.DataKeys[e.RowIndex].Value;
 }