没有在行绑定事件中获得控制权

本文关键字：控制权 事件 绑定 | 更新日期: 2023-09-27 18:04:02

我有一个网格视图在我的项目。如果项目以管理员身份登录，它具有编辑和查看的功能。但是当我作为用户登录时，我想禁用编辑选项。我试图禁用编辑选项，这是一个链接按钮内模板字段，但我得到错误这样做。

下面是我试过的代码:

protected void gvDocuments_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            string username = Convert.ToString(Session["Username"]);
            LinkButton btn = (LinkButton)gvDocuments.FindControl("lbtnEdit");
                 if (username == "user")
                 {
                    btn.Visible = false;
                 }
        }
谁能告诉我我哪里出错了?

编辑:

<asp:GridView ID="gvDocuments" runat="server" AutoGenerateColumns="False" OnRowDataBound="gvDocuments_RowDataBound" OnRowCommand="gvDocuments_RowCommand" PageSize="5" Width="100%" RowStyle-BackColor="#9FCFFF" SortedAscendingHeaderStyle-VerticalAlign="Bottom" SortedAscendingHeaderStyle-HorizontalAlign="Left" BackColor="#9BCDFF" HeaderStyle-BackColor="#51A8FF">
    <asp:TemplateField HeaderText="Actions">
        <itemtemplate>
            <asp:LinkButton ID="lbtnView" runat="server" CommandName="View" Text="View" ForeColor="#0033CC"></asp:LinkButton>
            <asp:LinkButton ID="lbtnEdit" runat="server" CommandName="DocEdit" Text="Edit" ForeColor="#0033CC"></asp:LinkButton>
            <asp:LinkButton ID="lbtnRenew" runat="server" CommandName="Email" Text="Email" ForeColor="#0033CC"></asp:LinkButton>
        </itemtemplate>
    </asp:TemplateField>
</asp:GridView>

没有在行绑定事件中获得控制权

您需要在单个项目中找到控件，而不是gvDocuments.FindControl。

所以用下面的…

e.Row.FindControl("lbtnEdit");

(这是使用我对<asp:Repeaters>的经验，而不是<asp:GridView>，但我的理解是相同的)

我的理解是错误的，根据MSDN，它不是.Item…它是.Row

请根据您的要求修改此样品:

。aspx: 

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ddlGridview._Default" %>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
 <head runat="server">
  <title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
    <asp:GridView ID="GridView1" runat="server" DataKeyNames="ID" AutoGenerateColumns ="False" OnRowEditing="GridView1_RowEditing" OnRowCommand="GridView1_RowCommand">
    <Columns>
        <asp:TemplateField HeaderText ="ID">
            <ItemTemplate>
               <asp:Label runat ="server" ID="lblID" Text ='<%#Eval("ID")%>'></asp:Label>
                <asp:Label runat ="server" ID="Label1" Text ='<%#Eval("username")%>'></asp:Label>
            </ItemTemplate>
         </asp:TemplateField>
         <asp:TemplateField HeaderText ="lk1">
            <ItemTemplate>
             <asp:LinkButton runat ="server" ID ="lk1"  CommandName ="Downl" Text ="lk1" CommandArgument='<%#DataBinder.Eval(Container.DataItem,"ID") %>' ></asp:LinkButton>
            </ItemTemplate>
         </asp:TemplateField>
          <asp:TemplateField HeaderText ="lk2">
            <ItemTemplate>
             <asp:LinkButton runat ="server" ID ="lk2" CommandName ="approve" Text ="lk2" CommandArgument='<%#DataBinder.Eval(Container.DataItem,"ID") %>'></asp:LinkButton>
            </ItemTemplate>
         </asp:TemplateField>
          <asp:TemplateField HeaderText ="lk3">
            <ItemTemplate>
             <asp:LinkButton runat ="server" ID ="lk3" CommandName ="rework" Text ="lk3" CommandArgument='<%#DataBinder.Eval(Container.DataItem,"ID") %>'></asp:LinkButton>
            </ItemTemplate>
         </asp:TemplateField>

    </Columns>
</asp:GridView>
</div>
</form>

CS file:

    protected void Page_Load(object sender, EventArgs e)
    {
        GridView1.DataSource = CreateDataTable();
        GridView1.DataBind();
    }
    private DataTable CreateDataTable()
    {
        DataTable myDataTable = new DataTable();
        DataColumn myDataColumn;
        myDataColumn = new DataColumn();
        myDataColumn.DataType = Type.GetType("System.String");
        myDataColumn.ColumnName = "id";
        myDataTable.Columns.Add(myDataColumn);
        myDataColumn = new DataColumn();
        myDataColumn.DataType = Type.GetType("System.String");
        myDataColumn.ColumnName = "username";
        myDataTable.Columns.Add(myDataColumn);
        DataRow row;
        row = myDataTable.NewRow();
        row["id"] = "1";
        row["username"] = "hungn";
        myDataTable.Rows.Add(row);
        DataRow row1;
        row1 = myDataTable.NewRow();
        row1["id"] = "2";
        row1["username"] = "hoanq";
        myDataTable.Rows.Add(row1);
        return myDataTable;
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
    }
    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "Downl")
        {
            int index = Convert.ToInt32(e.CommandArgument);
            // get the GridViewRow where the command is raised
            GridViewRow Row = ((GridViewRow)GridView1.Rows[index-1]);
            LinkButton approve = Row.FindControl("lk1") as LinkButton;
            approve.Enabled = true;
            LinkButton rework = Row.FindControl("lk2") as LinkButton;
            rework.Enabled = true;
            LinkButton comment = Row.FindControl("lk3") as LinkButton;
            comment.Enabled = false;
        }
    }

如果还有问题请告诉我。

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