顯示確認消息-ON-GridView控件，deleting.aspx

我試圖刪除之前做確認消息，但我有錯誤顯示確認消息-ON-GridView控件，deleting.aspx

無法投類型的對象System.Web.UI.LiteralControl「鍵入 'System.Web.UI.WebControls.LinkButton'。

我不知道問題出在哪裏，我怎麼解決這個問題，

<script type="text/javascript"> 
    function ConfirmOnDelete(item) 
    { 
     if (confirm("Are you sure to delete: " + item + "?")==true) 
      return true; 
      else 
      return false; 
    } 
</script>

<asp:GridView ID="GVAllProjects" runat="server" 
    OnRowDataBound="GVAllProjects_RowDataBound" 
    OnRowDeleting="GVAllProjects_RowDeleting" 
    OnRowEditing="GVAllProjects_RowEditing" 
    OnRowUpdating="GVAllProjects_RowUpdating" 
    OnRowCancelingEdit="GVAllProjects_RowCancelingEdit" 
    OnPageIndexChanging="GVAllProjects_PageIndexChanging" 
    PagerSettings-Mode="NumericFirstLast" 
    AutoGenerateColumns="False" AllowPaging="True" PageSize="3" DataKeyNames="ID" 
    CssClass="grid"> 
    <EditRowStyle CssClass="GridViewEditRow" /> 
    <Columns> 
     <asp:CommandField ButtonType="Image" UpdateText="تحديث" CancelImageUrl="~/images/close-btn.png" CancelText="الغاء" DeleteImageUrl="images/delete.png" DeleteText="حذف" EditText="تعديل" ShowEditButton="true" ShowDeleteButton="true" ItemStyle-Width="150" /> 
    <asp:TemplateField Visible="false"> 
     <ItemTemplate> 
     <asp:Label ID="lblProID" Visible="false" runat="server" Text='<%# Eval("ID")%>' /> 

     </ItemTemplate> 
    </asp:TemplateField> 
    <asp:TemplateField HeaderText="المشروعات" ItemStyle-Width="150"> 
               <ItemTemplate> 
    <asp:Label ID="lblProjectName" runat="server" Text='<%# Eval("ProjectName")%>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:TextBox ID="txtProjectName" runat="server" Text='<%# Eval("ProjectName") %>'></asp:TextBox> 
               </EditItemTemplate> 
              </asp:TemplateField> 
              <asp:TemplateField HeaderText="الغرض" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <asp:Label ID="lblPurposeName" runat="server" Text='<%# Bind("Purpose.PurposeName")%>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:DropDownList ID="ddlPurposeName" runat="server"> 
                </asp:DropDownList> 
                <asp:RequiredFieldValidator ID="valPurposeName" runat="server" ControlToValidate="ddlPurposeName" 
                 Display="Dynamic" ErrorMessage="PurposeName is required." ForeColor="Red" SetFocusOnError="True" 
                 ValidationGroup="editGrp">*</asp:RequiredFieldValidator> 
               </EditItemTemplate> 
               <FooterTemplate> 
                <asp:DropDownList ID="ddlPurposeNameNew" runat="server"> 
                </asp:DropDownList> 
                <asp:RequiredFieldValidator ID="valClassificationNew" runat="server" ControlToValidate="ddlPurposeNameNew" 
                 Display="Dynamic" ErrorMessage="DistrictName is required." ForeColor="Red" SetFocusOnError="True" 
                 ValidationGroup="newGrp">*</asp:RequiredFieldValidator> 
               </FooterTemplate> 
              </asp:TemplateField> 

              <asp:TemplateField HeaderText="الموقع" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <asp:Label ID="lblDistrictName" runat="server" Text='<%# Eval("District.DistrictName") %>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:DropDownList ID="ddlDistrictName" runat="server"> 
                </asp:DropDownList> 
                <asp:RequiredFieldValidator ID="valDistrictName" runat="server" ControlToValidate="ddlDistrictName" 
                 Display="Dynamic" ErrorMessage="DistrictName is required." ForeColor="Red" SetFocusOnError="True" 
                 ValidationGroup="editGrp">*</asp:RequiredFieldValidator> 
               </EditItemTemplate> 
               <FooterTemplate> 
                <asp:DropDownList ID="ddlDistrictNameNew" runat="server"> 
                </asp:DropDownList> 
                <asp:RequiredFieldValidator ID="valDistrictNameNew" runat="server" ControlToValidate="ddlDistrictNameNew" 
                 Display="Dynamic" ErrorMessage="DistrictName is required." ForeColor="Red" SetFocusOnError="True" 
                 ValidationGroup="newGrp">*</asp:RequiredFieldValidator> 
               </FooterTemplate> 
              </asp:TemplateField> 
              <asp:TemplateField HeaderText="النوع" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <asp:Label ID="lblTypes" runat="server" Text='<%# Bind("Type.TypeName")%>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:DropDownList ID="ddlTypes" runat="server"> 
                </asp:DropDownList> 
                <asp:RequiredFieldValidator ID="valTypes" runat="server" ControlToValidate="ddlTypes" 
                 Display="Dynamic" ErrorMessage="Types is required." ForeColor="Red" SetFocusOnError="True" 
                 ValidationGroup="editGrp">*</asp:RequiredFieldValidator> 
               </EditItemTemplate> 
               <FooterTemplate> 
                <asp:DropDownList ID="ddlTypesNew" runat="server"> 
                </asp:DropDownList> 
                <asp:RequiredFieldValidator ID="valTypesNew" runat="server" ControlToValidate="ddlTypesNew" 
                 Display="Dynamic" ErrorMessage="Types is required." ForeColor="Red" SetFocusOnError="True" 
                 ValidationGroup="newGrp">*</asp:RequiredFieldValidator> 
               </FooterTemplate> 
              </asp:TemplateField> 
              <asp:TemplateField HeaderText="المساحات" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <asp:Label ID="lblAreas" runat="server" Text='<%# Eval("Areas")%>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:TextBox ID="txtAreas" runat="server" Text='<%# Eval("Areas") %>'></asp:TextBox> 
               </EditItemTemplate> 
              </asp:TemplateField> 
              <asp:TemplateField HeaderText="نظام السداد" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <asp:Label ID="lblPaymentSystem" runat="server" Text='<%# Eval("PaymentSystem")%>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:TextBox ID="txtPaymentSystem" runat="server" Text='<%# Eval("PaymentSystem") %>'></asp:TextBox> 
               </EditItemTemplate> 
              </asp:TemplateField> 
              <asp:TemplateField HeaderText="تاريخ الاستلام" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <asp:Label ID="lblReceivedDate" runat="server" Text='<%# Eval("ReceivedDate", "{0:d}")%>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:TextBox ID="txtEditDate" Text='<%# Eval("ReceivedDate", "{0:d}")%>' runat="server"></asp:TextBox> 
                <asp:ImageButton runat="server" ID="imgPopup" ImageUrl="~/images/-calendar.png" ImageAlign="Bottom" /> 
                <ajaxToolkit:CalendarExtender PopupButtonID="imgPopup" ID="CalendarExtender1" runat="server" TargetControlID="txtEditDate" 
                 Format="MM/dd/yyyy" Enabled="true" /> 
               </EditItemTemplate> 
               <FooterTemplate> 
                <asp:TextBox ID="txtAddDate" runat="server"></asp:TextBox> 
                <asp:ImageButton runat="server" ID="imgPopup" ImageUrl="~/images/-calendar.png" ImageAlign="Bottom" /> 
                <ajaxToolkit:CalendarExtender ID="CalendarExtender2" runat="server" PopupPosition="BottomRight" 
                 TargetControlID="txtAddDate" PopupButtonID="imgPopup" Enabled="true" Format="dd/MM/yyyy" /> 
               </FooterTemplate> 
              </asp:TemplateField> 
              <asp:TemplateField HeaderText="تصنيف العقار" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <asp:Label ID="lblClassification" runat="server" Text='<%# Eval("PropertyClassification")%>'></asp:Label> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:TextBox ID="txtClassification" runat="server" Text='<%# Eval("PropertyClassification") %>'></asp:TextBox> 
               </EditItemTemplate> 
              </asp:TemplateField> 
              <asp:TemplateField HeaderText="صورة المشروع" ItemStyle-Width="150"> 
               <ItemTemplate> 
                <img src='ProjectsImages/<%# Eval("ProjectImage") %>' style="width: 135px; height: 85px;" /> 
               </ItemTemplate> 
               <EditItemTemplate> 
                <asp:FileUpload ID="UploadPhoto" runat="server" /> 
               </EditItemTemplate> 
              </asp:TemplateField> 
             </Columns> 
            </asp:GridView>

背後

if (e.Row.RowType == DataControlRowType.DataRow) 
{ 
     string id = e.Row.Cells[0].Text; // Get the id to be deleted 
             //cast the ShowDeleteButton link to linkbutton 
     LinkButton lb = (LinkButton)e.Row.Cells[9].Controls[2]; 
     if (lb != null) 
     { 
      //attach the JavaScript function with the ID as the paramter 
      lb.Attributes.Add("onclick", "return ConfirmOnDelete('" + id + "');"); 
     } 

     ddlDistrictName = e.Row.FindControl("ddlDistrictName") as DropDownList; 
     ddlPurposeName = e.Row.FindControl("ddlPurposeName") as DropDownList; 
     ddlTypes = e.Row.FindControl("ddlTypes") as DropDownList; 
}

任何幫助代碼表示讚賞。

來源

2017-01-03 hashim

開始使用項目模板作爲控制按鈕，您將擁有更多選項。

<asp:TemplateField ShowHeader="False"> 
    <ItemTemplate> 
     <asp:ImageButton ID="DeleteItem" runat="server" ImageUrl="~/delete.png" CommandName="Delete" OnClientClick="return confirm('Are you sure you want to delete this item?');" AlternateText="Delete" /> 
    </ItemTemplate> 
</asp:TemplateField>

請注意使用CommandName，在本例中爲Delete。您也可以使用Edit,Update和Cancel。基本上與CommandField

中的項目相同

來源

2017-01-03 08:04:08 VDWWD

顯示確認消息-ON-GridView控件，deleting.aspx

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