如何從過濾后的GridView使DropDownList動態

Question

這是我的Asp.net代碼：

<asp:UpdatePanel runat="server" ClientIDMode="Static" ID="TasksUpdatePanel" UpdateMode="Conditional">
    <ContentTemplate>
        <table class="taskGridView">
            <tr>
                <td>
                    <asp:DropDownList ID="ddlTaskName" CssClass="chosen-select" DataSourceID="dsPopulateTaskName" AutoPostBack="true" DataValueField="Task Name" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlTaskName_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateTaskName" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [ATTR2739] 'Task Name' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlService" CssClass="chosen-select" DataSourceID="dsPopulateService" AutoPostBack="true" DataValueField="Service" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlService_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateService" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [ATTR2846] 'Service' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlStatus" CssClass="chosen-select" DataSourceID="dsPopulateStatus" AutoPostBack="true" DataValueField="Status" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlStatus_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateStatus" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [ATTR2812] 'Status' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlDueDate" CssClass="chosen-select" DataSourceID="dsPopulateDueDate" AutoPostBack="true" DataValueField="Due Date" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlDueDate_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateDueDate" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT CONVERT(VARCHAR(14), [ATTR2752], 110) 'Due Date' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlOwner" CssClass="chosen-select" DataSourceID="dsPopulateOwner" AutoPostBack="true" DataValueField="Owner" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlOwner_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateOwner" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [REALNAME] 'Owner' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlClient" CssClass="chosen-select" DataSourceID="dsPopulateClient" AutoPostBack="true" DataValueField="Client" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlClient_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateClient" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [ATTR2815] 'Client' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlSite" CssClass="chosen-select" DataSourceID="dsPopulateSite" AutoPostBack="true" DataValueField="Site" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlSite_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateSite" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [ATTR2819] 'Site' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlPractice" CssClass="chosen-select" DataSourceID="dsPopulatePractice" AutoPostBack="true" DataValueField="Practice" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlPractice_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulatePractice" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [ATTR2817] 'Practice' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
                <td>
                    <asp:DropDownList ID="ddlProvider" CssClass="chosen-select" DataSourceID="dsPopulateProvider" AutoPostBack="true" DataValueField="Provider" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlProvider_onSelectIndexChanged">
                        <asp:ListItem Text="All" Value="%"></asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="dsPopulateProvider" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand="SELECT DISTINCT [ATTR2919] 'Provider' FROM HSI.RMOBJECTINSTANCE1224 CT INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1) LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911 LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907 INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID WHERE CT.ACTIVESTATUS = 0"></asp:SqlDataSource>
                </td>
            </tr>
        </table>
        <asp:GridView ShowHeaderWhenEmpty="false" AlternatingRowStyle-BackColor="#EBE9E9" AutoGenerateColumns="false" OnSorting="yourTasksGV_Sorting" AllowSorting="true" ID="yourTasksGV" runat="server" ClientIDMode="Static" EmptyDataText="There is no data to display" OnRowDataBound="yourTasksGV_RowDataBound" OnRowCreated="yourTasksGV_RowCreated">
            <Columns>
                <asp:HyperLinkField Target="_blank" DataNavigateUrlFields="Task Detail" DataTextField="Task Name" DataNavigateUrlFormatString="" HeaderText="Task Detail" SortExpression="Task Name" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Service" HeaderText="Service" SortExpression="Service" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Status" HeaderText="Status" SortExpression="Status" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Due Date" HeaderText="Due" SortExpression="Due Date" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Owner" HeaderText="Owner" SortExpression="Owner" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Client" HeaderText="Client" SortExpression="Client" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Site" HeaderText="Site" SortExpression="Site" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Practice" HeaderText="Practice" SortExpression="Practice" ItemStyle-CssClass="taskTableColumn" />
                <asp:BoundField DataField="Provider" HeaderText="Provider" SortExpression="Provider" ItemStyle-CssClass="taskTableColumn" />
            </Columns>
        </asp:GridView>
    </ContentTemplate>
</asp:UpdatePanel>

我的后台代碼：

protected void Page_Load(object sender, EventArgs e)
{

    strMainQuery = @"SELECT
               CT.OBJECTID,
               'http://checkthis.com/d=' + CAST(CT.OBJECTID AS VARCHAR) + '&classid=1224' 'Task Detail'
               ,LTRIM(RTRIM(CT.ATTR2846)) 'Service'
               ,LTRIM(RTRIM(CT.ATTR2812)) 'Status'
               ,CONVERT(VARCHAR(14), CT.ATTR2752, 110) 'Due Date'
               ,LTRIM(RTRIM(CT.ATTR2739)) 'Task Name'
               ,LTRIM(RTRIM(UA.REALNAME)) 'Owner'
               ,LTRIM(RTRIM(C.ATTR2815)) 'Client'
               ,RTRIM(SI.ATTR2819) 'Site'
               ,RTRIM(PR.ATTR2817) 'Practice'
               ,RTRIM(P.ATTR2919) 'Provider'
        FROM HSI.RMOBJECTINSTANCE1224 CT 
               INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 
               INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1)
               LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911
               LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907
                INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID";

    if (!Page.IsPostBack)
    {
        ViewState["sortOrder"] = "Asc";
        ViewState["sortExp"] = "Due Date";
        PullData("Due Date", "Asc"); //ASC: A (top) to Z (bottom) || # (low to high) || Date (oldest to newest)
    }
}
public void PullData(string sortExp, string sortDir)
{
    query = "";
    DataTable taskData = new DataTable();
    connString = @""; //connectionstring
    if (ddlTaskName.SelectedIndex > 0)
    {
        strClause += " AND CT.ATTR2739 = '" + ddlTaskName.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND CT.ATTR2739 LIKE '%'";
    }
    if (ddlService.SelectedIndex > 0)
    {
        strClause += " AND CT.ATTR2846 = '" + ddlService.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND CT.ATTR2846 LIKE '%'";
    }
    if (ddlStatus.SelectedIndex > 0)
    {
        strClause += " AND CT.ATTR2812 = '" + ddlStatus.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND CT.ATTR2812 LIKE '%'";
    }
    if (ddlDueDate.SelectedIndex > 0)
    {
        strClause += " AND CONVERT(VARCHAR(14), CT.ATTR2752, 110) = '" + ddlDueDate.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND CONVERT(VARCHAR(14), CT.ATTR2752, 110) LIKE '%'";
    }
    if (ddlOwner.SelectedIndex > 0)
    {
        strClause += " AND UA.REALNAME = '" + ddlOwner.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND UA.REALNAME LIKE '%'";
    }
    if (ddlClient.SelectedIndex > 0)
    {
        strClause += " AND C.ATTR2815 = '" + ddlClient.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND C.ATTR2815 LIKE '%'";
    }
    if (ddlSite.SelectedIndex > 0)
    {
        strClause += " AND SI.ATTR2819 = '" + ddlSite.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND SI.ATTR2819 LIKE '%'";
    }
    if (ddlPractice.SelectedIndex > 0)
    {
        strClause += " AND PR.ATTR2817 = '" + ddlPractice.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND PR.ATTR2817 LIKE '%'";
    }
    if (ddlProvider.SelectedIndex > 0)
    {
        strClause += " AND P.ATTR2919 = '" + ddlProvider.SelectedItem.Text + "'";
    }
    else
    {
        strClause += " AND P.ATTR2919 LIKE '%'";
    }


    if (ddlTaskName.SelectedIndex == 0 && ddlService.SelectedIndex == 0 && ddlStatus.SelectedIndex == 0 && ddlDueDate.SelectedIndex == 0 && ddlOwner.SelectedIndex == 0 && ddlClient.SelectedIndex == 0 && ddlSite.SelectedIndex == 0 && ddlPractice.SelectedIndex == 0 && ddlProvider.SelectedIndex == 0)
    {
        query = strMainQuery + " WHERE CT.ACTIVESTATUS = 0";
    }
    else
    {
        query = strMainQuery + " WHERE CT.ACTIVESTATUS = 0" + strClause;
    }

    using (SqlConnection conn = new SqlConnection(connString))
    {
        try
        {
            SqlCommand cmd = new SqlCommand(query, conn);

            // create data adapter
            SqlDataAdapter da = new SqlDataAdapter(query, conn);
            // this will query your database and return the result to your datatable

            DataSet myDataSet = new DataSet();
            da.Fill(myDataSet);

            myDataView = new DataView();
            myDataView = myDataSet.Tables[0].DefaultView;

            if (sortExp != string.Empty)
            {
                //MessageBox.Show(sortExp);
                //MessageBox.Show(sortDir);
                myDataView.Sort = string.Format("{0} {1}", sortExp, sortDir);
            }

            yourTasksGV.DataSource = myDataView;
            yourTasksGV.DataBind();

            TasksUpdatePanel.Update();

            conn.Close();
        }
        catch (Exception ex)
        {
            string error = ex.Message;
        }
    }
}
protected void ddlTaskName_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlOwner_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlService_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlStatus_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlDueDate_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlClient_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlSite_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlPractice_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}
protected void ddlProvider_onSelectIndexChanged(object sender, EventArgs e)
{
    PullData(ViewState["sortExp"].ToString(), ViewState["sortOrder"].ToString());
}

public string sortOrder
{
    get
    {
        if (ViewState["sortOrder"].ToString() == "Desc")
        {
            ViewState["sortOrder"] = "Asc";
        }
        else
        {
            ViewState["sortOrder"] = "Desc";
        }

        return ViewState["sortOrder"].ToString();
    }
    set
    {
        ViewState["sortOrder"] = value;
    }
}

如何從過濾的GridView中實現Dynamic DropDownList？

提前致謝。

Answer 1

你可以嘗試的一件事

1. 排除where子句中的所有私有查詢中的所有下拉查詢
2. 您可以創建一個將為所有對象構建where子句的方法（下拉列表和gridview）
3. 當數據綁定時，網格視圖也重新綁定了下拉菜單。

注意 ：由於您正在使用附加數據綁定項，因此需要清除當前選項。 替代方案將是類似

select 'All' as [Task Name], '%' as value
union
SELECT DISTINCT [ATTR2739] as 'Task Name', [ATTR2739] as 'Value' FROM .....

如果您將自己設為私有，則選擇vars，例如

var _selectForADropDown = "select distinct ...... {0}" 

然后在將過濾器應用於gridview的地方，還可以將過濾器應用於下拉菜單的數據源

dataSourceForDropDown.SelectStatement = string.Format(selectForADropDown, MethodForTheWareClasues());
dropDownList.DataBind();

一件事可能會有所幫助

在查詢的每個部分使用私有const vars，以便您可以重用它

分解查詢，以便where和from子句可用於gridview和下拉列表

private const string StrMainQuery = @"SELECT
               CT.OBJECTID,
               'http://checkthis.com/d=' + CAST(CT.OBJECTID AS VARCHAR) + '&classid=1224' 'Task Detail'
               ,LTRIM(RTRIM(CT.ATTR2846)) 'Service'
               ,LTRIM(RTRIM(CT.ATTR2812)) 'Status'
               ,CONVERT(VARCHAR(14), CT.ATTR2752, 110) 'Due Date'
               ,LTRIM(RTRIM(CT.ATTR2739)) 'Task Name'
               ,LTRIM(RTRIM(UA.REALNAME)) 'Owner'
               ,LTRIM(RTRIM(C.ATTR2815)) 'Client'
               ,RTRIM(SI.ATTR2819) 'Site'
               ,RTRIM(PR.ATTR2817) 'Practice'
               ,RTRIM(P.ATTR2919) 'Provider'";
        private const string _from = @"
        FROM HSI.RMOBJECTINSTANCE1224 CT 
               INNER JOIN HSI.RMOBJECTINSTANCE1232 S ON CT.ATTR2846 = S.ATTR2821 
               INNER JOIN HSI.USERACCOUNT UA ON S.FK2852 = (UA.USERNUM * -1)
               LEFT JOIN HSI.RMOBJECTINSTANCE1251 PXC ON PXC.FK2924 = CT.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1249 P ON PXC.FK2923 = P.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1248 PRXC ON PRXC.FK2912 = CT.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1230 PR ON PR.OBJECTID = PRXC.FK2911
               LEFT JOIN HSI.RMOBJECTINSTANCE1247 SXC ON SXC.FK2908 = CT.OBJECTID
               LEFT JOIN HSI.RMOBJECTINSTANCE1229 SI ON SI.OBJECTID = SXC.FK2907
                INNER JOIN HSI.RMOBJECTINSTANCE1231 C ON CT.FK2927 = C.OBJECTID
        ";
        private const string where = @"
                WHERE CT.ACTIVESTATUS = 0
                AND CT.ATTR2739 LIKE '{0}'
                AND CT.ATTR2846 LIKE '{1}'
                AND CT.ATTR2812 LIKE '{2}'
                AND AND CONVERT(VARCHAR(14), CT.ATTR2752, 110) LIKE '{3}'
                AND UA.REALNAME LIKE '{4}'
                AND C.ATTR2815 LIKE '{5}'
                AND SI.ATTR2819 LIKE '{6}'
                AND PR.ATTR2817 LIKE '{7}'
                AND P.ATTR2919 LIKE '{8}'
        ";

然后建立您的查詢類似：

private string GetWhere()
    {
        return string.Format(where,
            ddlTaskName.SelectedValue,
            ddlService.SelectedValue,
            ddlStatus.SelectedValue,
            ddlDueDate.SelectedValue,
            ddlOwner.SelectedValue,
            ddlClient.SelectedValue,
            ddlSite.SelectedValue,
            ddlPractice.SelectedValue,
            ddlProvider.SelectedValue
            );
    }

    private string GetGridSelect()
    {
        return string.Concat(StrMainQuery, _from, GetWhere());
    }

那么您可以使用上面的union all方法為每個下拉列表構建查詢，以保留“ all”

    private void ReloadDropDown()
    {
        dsPopulateProvider.SelectCommand = GetDropDownGuery();
        ddlProvider.DataBind();
    }

通過創建該選擇的視圖然后使用實體框架，您將受益匪淺。 一鍵獲取所有項目的價值將非常簡單，但是我的答案是基於您當前正在做的事情。

我將要進行這些更改的步驟

1. 為on加載方法上方的select語句添加const vars
2. 添加方法以獲取where子句（上面的示例）
3. 添加方法以獲取網格視圖的完整選擇語句（上述示例）
4. 拉出所有代碼，以在當前數據綁定和構建網格視圖的方法中構建where子句，並從剛剛添加的方法中獲取select語句
5. add方法，用於為每個下拉列表構建不同的select語句，並重新綁定它們，如上所示

讓我知道您是否有任何問題，希望這對您有所幫助