获取GridView中选中行的单元格内容，单元格明明有内容但是为啥获取的值是空

[哇啦哇啦哇咔咔]

就是想给GridView写个编辑事件 需要获取当前数据行来进行更新数据库
数据库中是有内容的 但是用断点就是说到那一步的时候 获取的值为空

  protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            showMessage();
        }

        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            GridView1.EditIndex = -1;
            showMessage();
        }

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            string cc = GridView1.Rows[e.RowIndex].Cells[1].Text.Trim();
            Model.Message editmess = MessageBLL.GetModel(int.Parse(cc));

            editmess.Contents = GridView1.Rows[e.RowIndex].Cells[3].Text;
       
            MessageBLL.Update(editmess);
            showMessage();
        }

就是上面代码中的cc 值是空的 但是GridView中那一列是真的有值的
望各位过路大佬指点一二
感谢

[EdsionWang]

参考微软官方示例中的代码。 https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.gridview.rowupdating?redirectedfrom=MSDN&view=netframework-4.8

 protected void TaskGridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
  {    
    //Retrieve the table from the session object.
    DataTable dt = (DataTable)Session["TaskTable"];

    //Update the values.
    GridViewRow row = TaskGridView.Rows[e.RowIndex];
    dt.Rows[row.DataItemIndex]["Id"] = ((TextBox)(row.Cells[1].Controls[0])).Text;
    dt.Rows[row.DataItemIndex]["Description"] = ((TextBox)(row.Cells[2].Controls[0])).Text;
    dt.Rows[row.DataItemIndex]["IsComplete"] = ((CheckBox)(row.Cells[3].Controls[0])).Checked;

    //Reset the edit index.
    TaskGridView.EditIndex = -1;

    //Bind data to the GridView control.
    BindData();
  }