Asp.net Gridview：捕获排序方向

我在updatepanel中有一个gridview，它启用了排序，并且有一个事件处理程序，如下所示：

protected void MyGridSort(object sender, GridViewSortEventArgs e)
{
   var TheDirection = (e.SortDirection).ToString();
   var TheColumn = (e.SortExpression).ToString();
}

我在这些行后面放了一个断点。每次按下列标题时，我的变量TheDirection总是以升序显示

为什么它不能从上升到下降再返回

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谢谢。

您可以在ViewState或会话中保持方向。如下所示（未经测试的代码）：

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我一直在阅读，当您手动向gridview提供数据源时，排序似乎中断了。不确定这是否是你的情况，但这对我来说很有效

string strSortExpression = e.SortExpression + " ASC";
if (Convert.ToString(ViewState["SortExpression"]) == strSortExpression)
{
    strSortExpression = e.SortExpression + " DESC";
}
ViewState["SortExpression"] = strSortExpression;


//This is done by sorting the Default View of the underlying data and then re-binding this
//to the grid.
System.Data.DataTable myData = HttpContext.Current.Session["GridData"] as System.Data.DataTable;
if (myData != null)
{
   myData.DefaultView.Sort = strSortExpression;
   GridView1.DataSource = myData;
   GridView1.DataBind();
}

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希望它有帮助

无需使用会话变量或视图状态变量，您可以将其直接存储在GridView的

SortDirection

和

SortExpression

属性中。

string strSortExpression = e.SortExpression + " ASC";
if (Convert.ToString(ViewState["SortExpression"]) == strSortExpression)
{
    strSortExpression = e.SortExpression + " DESC";
}
ViewState["SortExpression"] = strSortExpression;


//This is done by sorting the Default View of the underlying data and then re-binding this
//to the grid.
System.Data.DataTable myData = HttpContext.Current.Session["GridData"] as System.Data.DataTable;
if (myData != null)
{
   myData.DefaultView.Sort = strSortExpression;
   GridView1.DataSource = myData;
   GridView1.DataBind();
}