10

我的 gridview 是这样的，但是当我选择视图按钮以查找所选索引上的主键值列已更改时出现错误。请帮我解决问题。

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
            <Columns >
                <asp:TemplateField >
                    <ItemTemplate >
                        <asp:Button ID="btnViewComments" Text ="View Comments" runat ="server" CommandName ="select" />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField ="forumId" Visible ="false" />
                <%--<asp:CommandField ButtonType ="Button" ShowSelectButton ="true" SelectText ="View Comments"/>--%>
                <asp:TemplateField HeaderText ="Question">
                    <ItemTemplate >
                        <asp:TextBox ID ="txtQuestion" Text ='<%#Eval("question")%>' runat ="server" TextMode ="MultiLine" Height="100" Width ="350"></asp:TextBox>
                       <%-- <%#Eval("question")%>--%>
                    </ItemTemplate>
                    <%--<EditItemTemplate >
                        <asp:TextBox ID ="txtQuestion" Text ='<%#Eval("question")%>' runat ="server" TextMode ="MultiLine" ></asp:TextBox>
                    </EditItemTemplate>--%>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Poster Name">
                    <ItemTemplate >
                        <%#Eval("posterName") %>
                    </ItemTemplate>
                    <EditItemTemplate >
                        <asp:Label ID ="lblPosterName" Text ='<%#Eval("posterName") %>' runat ="server" ></asp:Label>
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Date">
                    <ItemTemplate >
                        <%#Eval("dateTim") %>
                    </ItemTemplate>
                    <EditItemTemplate >
                        <asp:Label ID ="lblDateTime" Text ='<%#Eval("dateTim") %>' runat ="server" ></asp:Label>
                    </EditItemTemplate>
                </asp:TemplateField>
            </Columns>
            <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
            <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <EditRowStyle BackColor="#999999" />
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
        </asp:GridView>

我的代码是......

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {
        try
        {
            Int64 forumId = (Int64)GridView1.SelectedValue;
            Session["forumId"] = forumId;
            Response.Redirect("Thread.aspx");
        }
        catch (Exception)
        {

            throw;
        }
    }
4

6 回答 6

10

首先，您必须在网格视图声明中定义要创建数据键的字段名称。例如，如果你想要 "forumId" datakey.than

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" OnSelectedIndexChanged="GridView1_SelectedIndexChanged"
DataKeyNames="forumId">

而且你可以通过这种方式访问

int intforumid = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Values[0]);
于 2013-07-09T05:25:52.470 回答
2 
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
    try
    {
        Int64 forumId = Convert.ToInt64(GridView1.SelectedRow.Cells[1].Text);
        Session["forumId"] = forumId;
        Response.Redirect("Thread.aspx");
    }
    catch (Exception)
    {

        throw;
    }
}
于 2013-07-09T05:34:13.323 回答
0

你可以DataKeyNames像forumId下面这样设置

<asp:GridView ID="GridView1" runat="server" DataKeyNames = "forumId" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">

由于您在当前解决方案中没有给出任何数据键名，GridView1.SelectedValue因此不会包含您期望的值

于 2013-07-09T05:25:12.777 回答
0

看起来你只需要将DataKeyNames属性设置为forumId喜欢；

<asp:GridView DataKeyNames = "forumId" ...
于 2013-07-09T05:27:09.597 回答
0

您需要在要在 Datakey 选项卡下设置的 gridview 中指定唯一的列名。

从那里，您需要在后台代码中调用 _selectedIndexChanged 方法。

于 2013-10-30T03:25:41.623 回答
0

如果您没有在 page.cs 代码中使用 gridview 选择事件，那么您只需从 gridview 页面的 aspx 代码中删除 OnSelectedIndexChanged="GridView1_SelectedIndexChanged" 。

于 2015-02-22T18:49:36.617 回答