Question

当我尝试在用户不是管理员时隐藏gridview中的删除按钮时，我有以下错误。 ＆＃34;其他信息：未将对象引用设置为对象实例 ＆＃34;

HTML

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ClinicalFollowUpID"
  OnRowDataBound="OnRowDataBound" OnRowEditing="OnRowEditing" OnRowCancelingEdit="OnRowCancelingEdit"                            
  AllowPaging="True" OnPageIndexChanging="OnPaging" PageSize="5"
OnRowUpdating="OnRowUpdating" OnRowDeleting="OnRowDeleting">
<Columns>
  <asp:GridView ID="GridView1" runat="server AutoGenerateColumns="False" DataKeyNames="ClinicalFollowUpID"
      OnRowDataBound="OnRowDataBound" OnRowEditing="OnRowEditing"   OnRowCancelingEdit="OnRowCancelingEdit"
  OnRowUpdating="OnRowUpdating" OnRowDeleting="OnRowDeleting">
 <Columns>
  <asp:TemplateField HeaderText="ID" Visible="false">
   <ItemTemplate >
     <asp:Label ID="lblClinicalFollowUpID" runat="server" Text='<%# Eval("ClinicalFollowUpID") %>' >
    </asp:Label>
   </ItemTemplate>

</asp:TemplateField>
       <asp:TemplateField HeaderText="MBID">
       <ItemTemplate >
  <asp:Label ID="lblMBID" runat="server" Text='<%# Eval("MBID") %>' >
      </asp:Label>
           </ItemTemplate>
             </asp:TemplateField>
   </asp:TemplateField>
   <asp:CommandField ButtonType="Link" ShowEditButton="true" ShowDeleteButton="true" ItemStyle-Width="150" HeaderText="Click to Edit">
        <ItemStyle Width="150px"></ItemStyle>
         </asp:CommandField>
        </Columns>

C＃代码

  protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
    {
        lbltype.Text = Session["Type"].ToString();
        if (e.Row.RowType == DataControlRowType.DataRow)
        {

            if (lbltype.Text != "admin")
            {

               LinkButton lnkedit = (LinkButton)GridView1.FindControl("lnkedit");
                lnkedit.Visible = false;
            }
        }
  }

Answer 1

除非您在关闭网格视图的 AutoGenerateEditButton 属性后手动定义模板，否则您将无法使用FindControl访问链接按钮。

尝试以下操作以查找编辑链接按钮并将其隐藏（假设最后一列对应于命令字段）：

if (e.Row.RowType == DataControlRowType.DataRow)
  {
     if (lbltype.Text != "admin")
       {
         LinkButton deleteLink = (LinkButton)e.Row.Cells[e.Row.Cells.Count - 1].Controls[2];
         if(deleteLink != null && deleteLink.CommandName.Equals("Delete"))
           {
              deleteLink.Visible = false;
           }
       }
  }

Answer 2

试试这个

       Button btnEdit = (Button)e.Row.FindControl("Link");
        btnEdit.Visible = false;

或

       if (e.Row.RowType == DataControlRowType.DataRow )
        {
         var editBtn=   e.Row.Cells[3].Controls[2] as Button;
         editBtn.Visible = false;

        }

我试图隐藏Gridview

2 个答案: