Question

我在我的网站上使用vb.net。我想知道如果我有Listview Control＆amp;我想通过复选框删除所选行？我知道可以通过使用“For Each”来完成，但如何执行此操作我不知道。 pLease帮助我。

<asp:ListView ID="productsList" runat="server" DataKeyNames="">
                                        <LayoutTemplate>
                                            <table class="content-table products-table">
                                                <thead>
                                        <tr>
                                            <td class="checkbox-part">
                                                <asp:CheckBox runat="server" ID="chkAll" />
                                            </td>

                                            <td>
                                                Image
                                            </td>

                                            <td class="product-title">
                                                Name
                                            </td>

                                            <td>
                                               Item Code
                                            </td>

                                            <td>
                                                Budget
                                            </td>

                                            <td>
                                                MOQ
                                            </td>

                                            <td>
                                                Status
                                            </td>
                                        </tr>
                                    </thead>
                                                <div id="itemPlaceholderContainer" runat="server" style="">
                                                    <div runat="server" id="itemPlaceholder" />
                                                </div>
                                            </table>
                                        </LayoutTemplate>

                                        <ItemTemplate>
                                            <tbody>
                                        <tr>
                                            <td class="checkbox-part">
                                                <asp:CheckBox runat="server" ID="chk" />
                                            </td>

                                            <td>
                                                <img src='<%#"../../" + Eval("image") %>' runat="server" class="lil-thumbnail" />
                                            </td>

                                            <td class="product-title">
                                                <asp:Label ID="id" runat="server" Text='<%# Eval("ID") %>' Visible="false"></asp:Label>
                                                <asp:Label ID="productName" runat="server" Text='<%# Eval("product_name") %>'></asp:Label><br />
                                                <asp:hyperlink ID="Edit" runat="server" cssClass="editbtn icn" ToolTip="Edit Product" NavigateUrl='<%# "new-product.aspx?edit=edit" & "&" & "productID=" & Eval("ID") %>'></asp:hyperlink>

                                                <asp:LinkButton ID="Delete" runat="server" CssClass="deletebtn icn" CommandName="DeleteProduct" CommandArgument='<%# Eval("ID")%>' ToolTip="delete" OnClientClick="return confirm('Are you sure you want to delete this Item?')" CausesValidation="false"></asp:LinkButton>

                                                <asp:HyperLink ID="view" NavigateUrl="#" runat="server" CssClass="viewbtn icn" ToolTip="View Product"></asp:HyperLink>
                                            </td>

                                            <td>
                                                <asp:Label ID="sku" runat="server" Text='<%# Eval("sku") %>'></asp:Label>
                                            </td>

                                            <td>
                                                <asp:Label ID="price_range" runat="server" Text='<%# Eval("price_range") %>'></asp:Label>
                                            </td>

                                            <td>
                                                <asp:Label ID="moq" runat="server" Text='<%# Eval("moq") %>'></asp:Label>
                                            </td>

                                            <td>
                                                <asp:Label ID="status" runat="server" Text='<%# Eval("status") %>'></asp:Label>
                                            </td>
                                        </tr>
                                    </tbody>
                                        </ItemTemplate>
                                    </asp:ListView>

更新

Protected Sub deleteMultiple()
        Dim checkedItems As String = String.Empty
        For Each item As ListViewItem In productsList.Items
            Dim chk As CheckBox = DirectCast(item.FindControl("chk"), CheckBox)
            If chk Is Nothing Then
                Continue For
            End If
            'if no checkbox found, continue to foreach loop
            If chk.Checked Then
                Dim hdnId As HiddenField = DirectCast(item.FindControl("hdnId"), HiddenField)
                checkedItems += hdnId.Value + ","
            End If
        Next

        If Not String.IsNullOrEmpty(checkedItems) Then
            'checkedItems has ID of checked items which you can use to delete from database
            Dim lbl As String
            lbl = checkedItems
            Try
                Dim con As New MySqlConnection
                Dim query As New MySqlCommand
                con.ConnectionString = ConfigurationManager.ConnectionStrings("conio").ConnectionString()
                query.Connection = con
                con.Open()
                query.CommandText = "DELETE FROM products WHERE ID = @ID"
                query.Parameters.AddWithValue("@ID", lbl)
                query.ExecuteNonQuery()
                con.Close()
                Response.Redirect(Request.RawUrl)
            Catch ex As Exception
                Response.Write(ex)
            End Try
        End If
    End Sub

Answer 1

在ListView中使用隐藏字段来保存ID，如

<asp:HiddenField ID="hdnId" runat="server" Value='<%#Eval("ID") %>' />

添加OnItemCommand，如

 <asp:ListView ID="productsList" runat="server" OnItemCommand="productsList_ItemCommand" >

在代码隐藏

中

protected void productsList_ItemCommand(object sender, ListViewCommandEventArgs e)
    {
        string checkedItems = string.Empty;
        if (e.CommandName == "DeleteProduct")
        {
            foreach (ListViewItem item in productsList.Items) {
                CheckBox chk = (CheckBox)item.FindControl("chk");
                if (chk == null) continue; //if no checkbox found, continue to foreach loop

                if (chk.Checked) {
                    HiddenField hdnId = (HiddenField)item.FindControl("hdnId");
                    checkedItems += hdnId.Value + ",";
                }                    
            }
        }

        if (!string.IsNullOrEmpty(checkedItems))
        {
            //checkedItems has ID of checked items which you can use to delete from database
            lbl.Text = checkedItems;                
        }

    }

希望这能帮到你！

使用Checkbox asp.net从ListView控件中删除所选行

1 个答案: