ASP.NET:何时以及如何在代码中动态更改Gridview的headerText？

Question

我有一个2列的gridview.我想学习编码背后,不想在aspx文件中这样做. 如何动态设置列的标题文本？我什么时候这样做？适配器在使用数据填充gridview之后？现在,我有标题文本,但它与数据字段名称是last_name完全相同,我想在标题字段中看到姓氏.我试过了

GridView1.Columns[0].HeaderText = "Last Name";

但无论我试图把它放在哪里,编译器都会抱怨索引超出范围.

谢谢.

gridview的aspx代码:

    <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
                BackColor="White" BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px"
                Width="728px" CellPadding="4" ForeColor="Black" GridLines="Vertical" OnPageIndexChanging="GridView1_PageIndexChanging"
                OnSorting="GridView1_Sorting" PageSize="14" OnRowDataBound="GridView1_RowDataBound">
                <AlternatingRowStyle BackColor="White" />
                <FooterStyle BackColor="#CCCC99" />
                <HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />
                <PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />
                <RowStyle BackColor="#F7F7DE" />
                <SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />
                <SortedAscendingCellStyle BackColor="#FBFBF2" />
                <SortedAscendingHeaderStyle BackColor="#848384" />
                <SortedDescendingCellStyle BackColor="#EAEAD3" />
                <SortedDescendingHeaderStyle BackColor="#575357" />
                <PagerSettings Mode="NumericFirstLast" FirstPageText="First" LastPageText="Last"
                    PageButtonCount="5" Position="Bottom" />
            </asp:GridView>

Answer 1

尝试将它放在GridView1.RowDataBound处理程序中.评估e.Row.RowType以确定它是否是标题行,然后替换HeaderText.

protected void GridView1_RowDataBound(object sender, System.Web.UI.WebControls.GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header) {
        GridView1.Columns[0].HeaderText = "Last Name";

    }
}

但是,如果要动态创建列并使用排序,则需要以这种方式处理它以防止链接的偶然转换以排序为纯文本:

protected void GridView1_RowDataBound(object sender, System.Web.UI.WebControls.GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header) {
        LinkButton HLink = (LinkButton)e.Row.Cells[0].Controls[0];
        HLink.Text = "Last Name";
    }
}

使用其中任何一个,将此属性添加到ASPX中的Gridview:

OnRowDataBound="GridView1_RowDataBound"