Question

必须禁用选中复选框的行。我已使用以下代码在RowDataBound事件中尝试了它，但它显示错误Object reference not set to an instance of an object。

  CheckBox cbAttachClrReq = (CheckBox)gvEntity.FindControl("chkAdd");

  if (cbAttachClrReq.Checked)
  {
      this.gvEntity.Rows[e.Row.RowIndex].Enabled = false;
  }

Answer 1

您的CheckBox对象可能有null。所以我还在代码中添加了null检查。

if (e.Row.RowType == DataControlRowType.DataRow)
{
    CheckBox cbAttachClrReq = e.Row.FindControl("chkAdd") as CheckBox;

    if (cbAttachClrReq != null && cbAttachClrReq.Checked)
        e.Row.Enabled = false;
}

ADDED 根据评论提供的宝贵建议，如果对象为CheckBox，您甚至可以切换null州：

if (e.Row.RowType == DataControlRowType.DataRow)
{
    CheckBox cbAttachClrReq = e.Row.FindControl("chkAdd") as CheckBox;
    e.Row.Enabled = cbAttachClrReq == null || !cbAttachClrReq.Checked;
}

Answer 2

请尝试以下操作...我假设复选框位于gridview行....

protected void gvEntity_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
       CheckBox cbAttachClrReq = (CheckBox) e.Row.FindControl("chkAdd");

      if (cbAttachClrReq.Checked)
      {
          e.Row.Enabled = false;
      }       
    }

}

Answer 3

尝试以下方法...我假设复选框位于gridview行的Cell ....

protected void gvEntity_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
       CheckBox cbAttachClrReq = (CheckBox) e.Row.Cells[yourCellIndexOFChBox].FindControl("chkAdd");

      if (cbAttachClrReq.Checked)
      {
          e.Row.Enabled = false;
      }       
    }

}

如何禁用gridview中的行？

3 个答案: