如何在選中復選框的嵌套gridview中獲取字段的值？

Question

我在另一個gridview中有一個嵌套的gridview。 父gridview有一個任務列表，每個任務都有一個步驟列表（子gridview）。 每個步驟都有一個復選框，因此一旦用戶完成某個步驟，他將選中該復選框，這將觸發CheckChanged事件，在該事件中，我具有存儲過程來更新數據庫，因此選中的步驟注冊為已完成。

我有一個CheckChanged事件，該事件查找選中的復選框所在行的步驟ID，然后使用步驟ID作為輸入參數來觸發存儲過程。 這可行。 但是，可以添加步驟，並且由於某些原因，當單擊較早步驟的復選框時，用於查找步驟ID的代碼將不會向后退並識別步驟ID。 換句話說，如果某個任務的步驟ID為20，並且檢查了該事件並觸發了事件，那么如果我將一個步驟添加到了較早的任務（在Gridview上更高的任務）中，並且該步驟具有ID為21，單擊它會不斷將步驟ID注冊為20，就好像CheckChanged事件無法識別添加到另一個任務的步驟一樣。 這是我的代碼：

ASPX：

<asp:GridView ID="GridView1" 
                DataKeyNames="TaskID" 
                runat="server" 
                OnRowDataBound="GridView1_OnRowDataBound" 
                CssClass="DefaultGrid" 
                onRowCommand="GridView1_RowCommand" 
                EmptyDataText = "<br/>There are no Tasks in this Project." 
                AllowPaging="True" 
                AllowSorting="True" 
                CellPadding="4" 
                DataSourceID="SqlDataSource_mp_Display_Tasks_Home" 
                ForeColor="#333333" 
                GridLines="None" 
                AutoGenerateColumns="False">
    <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
    <RowStyle CssClass=" table-responsive body-content " />
    <Columns>
        <asp:CommandField ShowSelectButton="False" />          
        <asp:TemplateField>
            <ItemTemplate>
                <img alt = "" style="cursor: pointer" src="Images/plus.png" />                                           
                <asp:Panel ID="pnlOrders" runat="server" Style="display:none">                                          
                    <asp:GridView ID="GridView2" 
                                    runat="server" 
                                    onRowCommand="GridView2_RowCommand"  
                                    Datakeynames="TaskStepID"
                                    CssClass="ChildGrid" 
                                    EmptyDataText="<br/>There are no Steps in this Task." 
                                    AutoGenerateColumns="false" 
                                    onselectedindexchanged="GridView2_SelectedIndexChanged">
                        <Columns>                                                                     
                            <asp:BoundField DataField="TaskStepID" HeaderText="TaskStepID" Visible="true" />
                            <asp:BoundField DataField="TaskID" HeaderText="TaskID" Visible="false" />
                            <asp:BoundField DataField="TaskStepTypeID" HeaderText="TaskStepTypeID" Visible="false"/>
                            <asp:BoundField DataField="TaskStepPriority" HeaderText="Task Step Priority" Visible="false" />
                            <asp:BoundField ItemStyle-Width="70%" DataField="TaskStepDesc" HeaderText="Step Description" />                                   
                            <asp:TemplateField HeaderText="Step Completed" ItemStyle-Width="15%"  >
                                <ItemStyle HorizontalAlign="Center" />
                                <ItemTemplate>  
                                    <asp:Checkbox  ID="TaskStepCompleted"  
                                                    OnCheckedChanged="TaskStepCompleted_CheckedChanged" 
                                                    Checked='<%# Eval("TaskStepCompleted") %>' 
                                                    runat="server"                                                                                                                      
                                                    AutoPostBack="true" />                                                          
                                </ItemTemplate>                                                            
                            </asp:TemplateField>
                            <asp:BoundField DataField="TaskStepComment" HeaderText="TaskStepComment" Visible="false" />
                            <asp:TemplateField HeaderText="Step Activity" ItemStyle-Width="15%">
                                <ItemTemplate>       
                                    <asp:LinkButton Text="Add" ID="Addstep" runat="server" CommandName="addstep" CommandArgument='<%# Eval("TaskStepID") %>'/>
                                    <asp:LinkButton Text="Edit" ID="Editstep" runat="server" CommandName="editstep" CommandArgument='<%# Eval("TaskStepID") %>'/>                                                              
                                    <asp:LinkButton Text="Delete" ID="Deletestep" runat="server" CommandName="deletestep" OnClientClick="return confirm('<%=AlertMe%>');" CommandArgument='<%# Eval("TaskStepID") %>'/>                                                                                                   
                                </ItemTemplate>                                                            
                            </asp:TemplateField>
                        </Columns>
                    </asp:GridView>
                </asp:Panel>
            </ItemTemplate>
        </asp:TemplateField>  
        <asp:BoundField DataField="TaskID" HeaderText="Task ID" Visible="false"/> 
        <asp:BoundField DataField="ProjectID" HeaderText="Project ID" Visible="false" />               
        <asp:BoundField DataField="TaskTypeID" HeaderText="Task Type ID"  Visible="false" />
        <asp:BoundField DataField="TaskCompleted" HeaderText="Taske Completed?" Visible="false"  />                
        <asp:BoundField DataField="TaskCreationDate" HeaderText="Task Creation Date" Visible="false"  />
        <asp:BoundField DataField="TaskSubmitterID"  HeaderText="Task Submitter ID" Visible="false"  />
        <asp:BoundField DataField="DepartmentID" HeaderText="DepartmentID" Visible="false"  />
        <asp:BoundField DataField="TaskDueDateCommentType" HeaderText="Due Date Comment" Visible="false"  />
        <asp:BoundField DataField="TaskLastUpdatedDate" HeaderText="Task Last Updated Date" Visible="false"  />
        <asp:BoundField DataField="TaskLastUpdatedUserID" HeaderText="Task Last Updated UserID" Visible="false"  />                
        <asp:BoundField DataField ="TaskSubmitterName" HeaderText="Task Submitter Name" Visible="false"  />
        <asp:BoundField DataField="TaskLastUpdatedUser" HeaderText="Task Last Updated User" Visible="false"  />                
        <asp:BoundField DataField="DepartmentDesc" HeaderText="Dept" visible="false"/>
        <asp:TemplateField HeaderText="Task Description">
            <ItemTemplate>
                <asp:Label ID="TaskDescription" runat="server" Text='<%# HighlightText(Eval("TaskDescription").ToString()) %>'></asp:Label>
            </ItemTemplate>
            <ItemStyle Width="40%" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="% Comp.">
            <ItemStyle HorizontalAlign="Center" />
            <ItemTemplate>
                <asp:Label ID="PercentCompleted" runat="server" Text='<%# (String.IsNullOrEmpty(Eval("PercentCompleted").ToString()) ? "0" : Eval("PercentCompleted")) + " %" %>' ></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="TaskDueDate" HeaderStyle-HorizontalAlign="Right" HeaderText="Task Due Date" DataFormatString="{0:MM-dd-yyyy}" visible="true"/> 
        <asp:BoundField DataField="TaskTypeName" HeaderText="Task Type" visible="true" />
        <asp:BoundField DataField="DepartmentAbbrev" HeaderText="Dept" Visible="true"  /> 
        <asp:TemplateField HeaderText="Activity">
            <ItemTemplate>       
            <asp:LinkButton Text="Edit" ID="Edittask" runat="server" CommandName="edittask" CommandArgument='<%# Eval("TaskID") %>'/>                                                              
            <asp:LinkButton Text="Delete" ID="Deletetask" runat="server" CommandName="deletetask" OnClientClick="return confirm('Are you sure you wish to Delete this Task?');" CommandArgument='<%# Eval("TaskID") %>'/>                                                                                                   
            <asp:LinkButton Text="Comments" ID="Detailstask" runat="server" CommandName="detailstask" CommandArgument='<%# Eval("TaskID") %>'/>  
            </ItemTemplate>                                                            
        </asp:TemplateField>
    </Columns>           
    <EditRowStyle BackColor="#999999" />
    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
    <SortedAscendingCellStyle BackColor="#E9E7E2" />
    <SortedAscendingHeaderStyle BackColor="#506C8C" />
    <SortedDescendingCellStyle BackColor="#FFFDF8" />
    <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource_mp_Display_Tasks_Home" runat="server" FilterExpression="TaskDescription LIKE '%{0}%'" ConnectionString="<%$ ConnectionStrings:IntelliBaseConnectionString_mp_Display_Projects_Home %>" SelectCommand="mp_Display_Tasks_Home" SelectCommandType="StoredProcedure" ProviderName="System.Data.SqlClient">
    <SelectParameters>
        <asp:Parameter Name="Incoming_ProjectID" Type="Int32" />                          
    </SelectParameters>
    <FilterParameters>
        <asp:ControlParameter Name="TaskDescription" ControlID="txtSearchtasks" PropertyName="Text"/>
    </FilterParameters>
</asp:SqlDataSource>

CS：

protected void TaskStepCompleted_CheckedChanged(object sender, EventArgs e)
{
    // this nested foreach grabs the taskstepID number for the row in which the checkbox was just checked.
    foreach (GridViewRow row in GridView1.Rows)
    {
        if (row.RowType == DataControlRowType.DataRow)
        {
            GridView GridView2 = (GridView)row.FindControl("GridView2");

            if (GridView2 != null)
            {
                foreach (GridViewRow Row in GridView2.Rows)
                {
                    if (Row.RowType == DataControlRowType.DataRow)
                    {
                        System.Web.UI.WebControls.CheckBox chk = (System.Web.UI.WebControls.CheckBox)Row.FindControl("TaskStepCompleted");
                        if (chk.Checked || !chk.Checked)
                        {
                            Session["TaskStepID"] = GridView2.DataKeys[Row.RowIndex]["TaskStepID"].ToString();
                        }
                    }
                }
            }
        }
    }

    // autopost back the check box to run the stored procedure
    var TaskStepID = Session["TaskStepID"].ToString();
    var ProjectID = Session["ProjectID"].ToString();

    using (var conn = new SqlConnection("Data Source=orlandosql1;Initial Catalog=IntelliBase;Persist Security Info=True;User ID=trainingsurveys_webuser;Password=C@mb3rSQL;"))
    using (SqlCommand cmd = new SqlCommand("dbo.mp_Task_Step_Completed_Toggle", conn))
    {
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add("@TaskStepID", SqlDbType.Int).Value = TaskStepID;
        cmd.Parameters.Add("@AdminUserID", SqlDbType.Int).Value = "10";
        cmd.Parameters.Add("@LogActionItemID", SqlDbType.Int).Value = "15";
        cmd.Parameters.AddWithValue("@DTStamp", SqlDbType.DateTime.ToString("d")).Value = DateTime.Now.ToString("d");

        conn.Open();
        cmd.ExecuteNonQuery();
        conn.Close();

        Response.Redirect("Tasks.aspx?id=" + ProjectID.ToString());
    }           
}

我盡力描述這個問題。 回顧一下：嵌套的gridview具有帶復選框的行。 單擊復選框將自動更新數據庫表，但是無論復選框行如何，CheckedChanged代碼將僅注冊最新ID的ID。 任何見解均表示贊賞。

卡洛斯

Answer 1

如果我理解正確，我相信您的問題與您認為如何獲取GridViewRow的TaskStepID有關。 您正在做很多不必要的工作。 無需迭代兩個GridView的每一行，只需獲取剛剛單擊的CheckBox的GridViewRow。

CheckBox cb = (CheckBox)sender;
GridViewRow row = (GridViewRow)cb.NamingContainer;
GridView gv = (GridView)row.NamingContainer;
string taskStepID = gv.DataKeys[row.RowIndex].Value.ToString();

請注意，通過像您一樣迭代每一行，總是得到最后一行的TaskStepID 。 因此，當您在其前面添加一行時，它使用的是最后一行而不是您期望的那一行。