Dataview DataKeys 报错：索引超出范围！！高手请进！！！

Question

protected void gvCarLendInfo_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            Response.Redirect(string.Format("CarLendManage.aspx?ItemBH={0}", gvCarLendInfo.DataKeys[Convert.ToInt32(e.CommandArgument)]));
        }gvCarLendInfo的DataKeys属性也是设置的了！！！

Answer 1

DataKeys未获取到值，没绑定上。

Answer 2

gvCarLendInfo.DataKeys[Convert.ToInt32(e.CommandArgument)
这种写法不对一般是直接e.CommandArgument

Answer 3

我对gvCarLendInfo添加监控
在监控里看到这几个数据，大家看下是不是DataKeys拍[]的问题～
DataKeyNames {维数:[1]} string[]
[0] "BH" string- DataKeys {System.Web.UI.WebControls.DataKeyArray} System.Web.UI.WebControls.DataKeyArray
Count 0 int
IsReadOnly false bool
IsSynchronized false bool
+ SyncRoot {System.Web.UI.WebControls.DataKeyArray} object {System.Web.UI.WebControls.DataKeyArray}

Answer 4

<asp:GridView id="gvCarLendInfo" runat="server" Width="90%" OnPreRender="gvCarLendInfo_PreRender" CellSpacing="1" CaptionAlign="Bottom" BorderColor="Black" OnRowCommand="gvCarLendInfo_RowCommand" AutoGenerateColumns="False" DataKeyNames="BH" AllowPaging="True" AllowSorting="True">
        <Columns>
            <asp:ButtonField Text="编辑" ButtonType="Button">
                <HeaderStyle BackColor="#0000C0" Font-Size="Smaller"  />
                <ItemStyle HorizontalAlign="Center" Wrap="False"  />
            </asp:ButtonField>
            <asp:BoundField DataField="BH" HeaderText="编号">
                <FooterStyle BackColor="#80FFFF" />
                <HeaderStyle BackColor="#0000C0" BorderStyle="Dotted" BorderWidth="1px" />
                <ItemStyle HorizontalAlign="Center" Wrap="False" />
            </asp:BoundField>

Answer 5

你有没有给 DataKeyNames 赋值啊。如果没有赋值的话就会出现这种情况，在属性中设置一下就 OK 了

Answer 6

DataKeyNames="BH" 难道这句我写错了？？？？

Answer 7

protected void gvCarLendInfo_PreRender(object sender, EventArgs e)
        {
            SX_QCZLXXCJ biz = new SX_QCZLXXCJ();
            t = biz.LastXUHAO();
            gvCarLendInfo.DataSource = t;
            gvCarLendInfo.DataBind();
        }

Answer 8

你调试下看e.CommandArgument值是多少,你的DataKeyNames才一个字段,如果e.CommandArgument超过0就超出索引了吧

Answer 9

是行的索引,我弄错了,不好意思.
试下这个:
protected void gvCarLendInfo_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            Response.Redirect(string.Format("CarLendManage.aspx?ItemBH={0}", 
           ((GridView)sender).DataKeys[Convert.ToInt32(e.CommandArgument)]));
        }