C# 为什么我的分类不起作用？

我正在asp.NETGridView上使用排序，并且已经设置好了所有内容，但它不起作用。这些列甚至不像普通列那样加下划线，单击时什么也不会发生

网格：

 <asp:GridView ID="gvResults" runat="server" Width="100%" AllowSorting="True" OnSorting="gvResults_Sorting" AutoGenerateColumns="False" CssClass="tblBrowse">

转换排序方向：

 private string ConvertSortDirection(SortDirection sortDirection)
        {
            string newSortDirection = string.Empty;

            switch (sortDirection)
            {
                case SortDirection.Ascending:
                    newSortDirection = "ASC";
                    break;

                case SortDirection.Descending:
                    newSortDirection = "DESC";
                    break;
            }

            return newSortDirection;
        }

private string GetSortDirection(string sortExpression)
{
    if (sortExpression == this.SortExpression)
    {
        // reverse the sort direction when current sort expression is the same as the last time
        if (this.SortDirection == "ASC")
        {
            return "DESC";
        }
        else
        {
            return "ASC";
        }
    }
    else
    {
        // always return ASC when current sort expression is different than the last time
        return "ASC";
    }
}

设置每列的属性。例如，

SortExpression=“Column1”

表示按

Column1

排序，

SortExpression=“Column2”

表示按

Column2

排序，等等。以下是aspx代码的外观：

<asp:GridView ID="gvResults" runat="server" Width="100%" AllowSorting="True" OnSorting="gvResults_Sorting" AutoGenerateColumns="False" CssClass="tblBrowse">
    <Columns>
        <asp:BoundField DataField="Column1" SortExpression="Column1" />
        <asp:BoundField DataField="Column2" SortExpression="Column2" />
    </Columns>
</asp:GridView>

这是获取下一个排序方向的方法：

 private string ConvertSortDirection(SortDirection sortDirection)
        {
            string newSortDirection = string.Empty;

            switch (sortDirection)
            {
                case SortDirection.Ascending:
                    newSortDirection = "ASC";
                    break;

                case SortDirection.Descending:
                    newSortDirection = "DESC";
                    break;
            }

            return newSortDirection;
        }

private string GetSortDirection(string sortExpression)
{
    if (sortExpression == this.SortExpression)
    {
        // reverse the sort direction when current sort expression is the same as the last time
        if (this.SortDirection == "ASC")
        {
            return "DESC";
        }
        else
        {
            return "ASC";
        }
    }
    else
    {
        // always return ASC when current sort expression is different than the last time
        return "ASC";
    }
}

最后在

gvResults\u排序中

：

protected void gvResults_Sorting(object sender, GridViewSortEventArgs e)
{
    try
    {
        DataTable dtSortTable = gvResults.DataSource as DataTable;

        if (dtSortTable != null)
        {
            // get sort direction (ASC or DESC)
            string sortDirection = GetSortDirection(e.SortExpression);

            DataView dvSortedView = new DataView(dtSortTable);

            dvSortedView.Sort = e.SortExpression + " " + sortDirection;

            gvResults.DataSource = dvSortedView;
            gvResults.DataBind();

            // save current sort expression and sort direction to ViewState
            this.SortExpression = e.SortExpression;
            this.SortDirection = sortDirection;
        }
    }
    catch (Exception ex)
    {
        ExceptionHandling.NETException(ex, constPageID, constIsSiteSpecific);
    }
}

---

是否为每列设置了

SortExpression

属性？是否检查页面加载是否正常？这意味着您仅在非回发情况下绑定…@ekad我应该在排序表达式中输入什么？@connersz请参见下面的答案。好的，我添加了它，它在某种程度上起到了作用，但它只会在一个方向上排序一次，然后当您再次单击它时，它不会执行任何操作。