如何允许排序gridview?

时间:2011-03-18 12:58:24

标签: c# asp.net gridview

我有一个gridview并启用了排序。运行应用程序时,我单击第一列进行排序。我得到这个错误:“GridView'gvOutlookMeldingen'触发了事件排序,但没有处理。”

这是gridview:

<asp:GridView ID="gvOutlookMeldingen" runat="server" AllowSorting="True" AutoGenerateColumns="False" AutoGenerateSelectButton="True" onselectedindexchanged="GridView_SelectedIndexChanged">
    <Columns>
        <asp:TemplateField HeaderText="Melder" ItemStyle-HorizontalAlign="Center" SortExpression="Melder">
            <HeaderStyle BorderColor="#1A3491" Width="130px"></HeaderStyle>
            <ItemStyle Height="20px" HorizontalAlign="Center"></ItemStyle>
            <ItemTemplate>
                <%# (string)Eval("Melder") %>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="Onderwerp" HeaderText="Onderwerp" />
        <asp:TemplateField HeaderText="Omschrijving">
            <ItemTemplate>
                <div style="overflow:auto; width: 500px; height: 200px;">
                    <asp:Label ID="lblOmschrijving" runat="server" Text='<%# Bind("Omschrijving")%>'></asp:Label>
                </div>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="Meldingsdatum" HeaderText="Meldingsdatum" />
        <asp:BoundField DataField="OutlookID" HeaderText="OutlookID" />
    </Columns>
</asp:GridView>

感谢任何帮助

4 个答案:

答案 0 :(得分:23)

您在其他答案中提到的SortExpression中遗漏了BoundField

您还使用TemplateField,根据生成数据的内容,可能需要在使用SortExpression之后进行手动排序。

如果是这种情况,那么要手动排序,一种方法是将OnSorting回调添加到您的字段GridViewSortExpression以及回调方法你的代码隐藏。

这会导致标记和代码类似于(未经测试):

<asp:GridView ID="gvOutlookMeldingen" runat="server" 
    AllowSorting="True" 
    OnSorting="gvOutlookMeldingen_Sorting"
    AutoGenerateColumns="False" 
    AutoGenerateSelectButton="True" 
    onselectedindexchanged="GridView_SelectedIndexChanged">
    <Columns>
        <asp:BoundField DataField="Melder" HeaderText="Melder" SortExpression="Melder" />
        <asp:BoundField DataField="Onderwerp" HeaderText="Onderwerp" SortExpression="Onderwerp" />
            <asp:TemplateField HeaderText="Omschrijving" SortExpression="Omschrijving">
                <ItemTemplate>
                    <div style="overflow:auto; width: 500px; height: 200px;">
                        <asp:Label ID="lblOmschrijving" runat="server" Text='<%# Bind("Omschrijving")%>'></asp:Label>
                    </div>
                </ItemTemplate>
            </asp:TemplateField>
        <asp:BoundField DataField="Meldingsdatum" HeaderText="Meldingsdatum" SortExpression="Meldingsdatum" />
        <asp:BoundField DataField="OutlookID" HeaderText="OutlookID" SortExpression="OutlookID" />
    </Columns>
</asp:GridView>

...和

protected void gvOutlookMeldingen_Sorting(object sender, GridViewSortEventArgs e)
{
    switch (e.SortExpression)
    {
        case "Melder":
        if (e.SortDirection == SortDirection.Ascending)
        {
            gvOutlookMeldingen.DataSource = // Asc query for Melder field;
            gvOutlookMeldingen.DataBind();
        }
        else
        {
            gvOutlookMeldingen.DataSource = // Desc query for Melder field ;
            gvOutlookMeldingen.DataBind();
        }
        break;
        // case statements for your other fields.
    }
}

答案 1 :(得分:9)

这段代码可能会有所帮助(对于你们搜索这篇旧帖子的人):

protected void gvOutlookMeldingen_Sorting(object sender, GridViewSortEventArgs e)
{
    DataTable dt = (DataTable)Session["mySessionStoredTable"];
    dt.DefaultView.Sort = e.SortExpression // column name
        + " " + SortDir(e.SortExpression); // sort direction
    gv.DataSource = dt;
    gv.DataBind();
}

private string SortDir(string sColumn)
{
    string sDir = "asc"; // ascending by default
    string sPreviousColumnSorted = ViewState["SortColumn"] != null 
        ? ViewState["SortColumn"].ToString() 
        : "";

    if (sPreviousColumnSorted == sColumn) // same column clicked? revert sort direction
        sDir = ViewState["SortDir"].ToString() == "asc" 
            ? "desc"
            : "asc";
    else
        ViewState["SortColumn"] = sColumn; // store current column clicked

    ViewState["SortDir"] = sDir; // store current direction

    return sDir;
}

答案 2 :(得分:5)

您需要设置要排序的列的SortExpression属性。并且您需要向Sorting事件添加事件处理程序,以使排序在您的DataSource上运行。

有关详细信息,请参阅this MSDN articlethis example with sorting and paging

答案 3 :(得分:3)

我假设网格视图的数据源是DataTable,所以我认为你必须添加

SortExpression="column name"

在每个asp:您希望能够排序的Boundfield中,

例如

<asp:BoundField DataField="Melder" SortExpression="Melder" HeaderText="Melder" />