ASP.NET批量删除的问题 ····求解

批量删除的那个按钮不起作用，请帮忙看一下是怎么回事？
aspx代码

 <script type="text/javascript">

        function CheckAll(Obj) {

             var AllObj = document.all;

             if (Obj.checked)//全选

             {

                 for (var i = 0; i < AllObj.length; i++) {

                     if (AllObj[i].type == "checkbox") {

                         AllObj[i].checked = true;

                     }

                }

             }

            else//反选

            {

                 for (var i = 0; i < AllObj.length; i++) {

                     if (AllObj[i].type == "checkbox") {

                         AllObj[i].checked = false;

                    }

                }

             }

        }

     

     </script>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:DataList ID="DataList1" runat="server" Width="355px" 

            onitemcommand="DataList1_ItemCommand" DataKeyField="id"> 

            <HeaderTemplate>

                <asp:CheckBox ID="CheckBox2" runat="server" onclick="return CheckAll(this)" />

                <asp:Label ID="Label3" Width="70px" runat="server" Text="ID"></asp:Label>

                <asp:Label ID="Label4" Width="170px" runat="server" Text="imageUrl"></asp:Label>

                <asp:Label ID="Label5"  runat="server" Text="handle"></asp:Label>

            </HeaderTemplate>

            <ItemTemplate>

                <asp:CheckBox ID="CheckBox1" runat="server" />

                <asp:Label ID="Label1" Width="70px" runat="server" Text='<%# Eval( "id") %>'></asp:Label>

                <asp:Label ID="Label2" Width="170px" runat="server" Text='<%# Eval("imageUrl") %>'></asp:Label>

                <asp:Button ID="Button1" runat="server" CommandName="singleDelete" Text="delete" />

            </ItemTemplate>

             <FooterTemplate>

                <asp:Button ID="Button2" runat="server"  CommandName="mutlDelete" Text="deleteAll" />

            </FooterTemplate>

        </asp:DataList>

    </div>

    </form>

</body>

aspx.cs代码

引用

public partial class _234DeleteData : System.Web.UI.Page

    {

        ShowImageBll showImageBll = new BLL.ShowImageBll();

       

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                BindDataList();

            }

        }



        private void BindDataList()

        {

            DataSet ds = showImageBll.GetList();

            DataList1.DataSource = ds;

            DataList1.DataBind();

        }

        protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)

        {

          switch (e.CommandName)

            {

                case "singleDelete":

                    int id = int.Parse(DataList1.DataKeys[e.Item.ItemIndex].ToString());

                    if (showImageBll.GetList()!=null)

                    {

                        showImageBll.DeleteSingleList(id);

                        Response.Write("<script>alert('删除成功！')</script>");

                        BindDataList();//重新绑定数据库

                    }

                    else 

                    {

                        showImageBll.DeleteSingleList(id);

                        Response.Write("<script>alert('删除失败！')</script>");

                    }

                    break;

                case "mutlDelete":



                    DataListItemCollection dlic = DataList1.Items;//创建一个DataList列表项集合对象

                    for (int i = 0; i < dlic.Count; i++)

                    {

                        if (dlic[i].ItemType == ListItemType.AlternatingItem || dlic[i].ItemType == ListItemType.Item)

                        {

                              CheckBox cb=(CheckBox)dlic[i].FindControl("CheckBox1");

                              if (cb.Checked)

                              {

                                  int id1 = int.Parse(DataList1.DataKeys[dlic[i].ItemIndex].ToString());

                                  showImageBll.DeleteSingleList(id1);      

                              }

                        }

                    }

                    BindDataList();//重新绑定数据库

                    break;

                    

          

          }



        }

    }

--------------------编程问答-------------------- 单步调试看看是值没有取到（全选、反选），还是删除不起作用（DeleteSingleList）。 --------------------编程问答--------------------

引用楼主 abc8023 的回复:

批量删除的那个按钮不起作用，请帮忙看一下是怎么回事？
aspx代码

 <script type="text/javascript">

        function CheckAll(Obj) {

             var AllObj = document.all;

             if (Obj.checked)//全选

             {

                 for (var i = 0; i < AllObj.length; i++) {

                     if (AllObj[i].type == "checkbox") {

                         AllObj[i].checked = true;

                     }

                }

             }

            else//反选

            {

                 for (var i = 0; i < AllObj.length; i++) {

                     if (AllObj[i].type == "checkbox") {

                         AllObj[i].checked = false;

                    }

                }

             }

        }

     

     </script>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:DataList ID="DataList1" runat="server" Width="355px" 

            onitemcommand="DataList1_ItemCommand" DataKeyField="id"> 

            <HeaderTemplate>

                <asp:CheckBox ID="CheckBox2" runat="server" onclick="return CheckAll(this)" />

                <asp:Label ID="Label3" Width="70px" runat="server" Text="ID"></asp:Label>

                <asp:Label ID="Label4" Width="170px" runat="server" Text="imageUrl"></asp:Label>

                <asp:Label ID="Label5"  runat="server" Text="handle"></asp:Label>

            </HeaderTemplate>

            <ItemTemplate>

                <asp:CheckBox ID="CheckBox1" runat="server" />

                <asp:Label ID="Label1" Width="70px" runat="server" Text='<%# Eval( "id") %>'></asp:Label>

                <asp:Label ID="Label2" Width="170px" runat="server" Text='<%# Eval("imageUrl") %>'></asp:Label>

                <asp:Button ID="Button1" runat="server" CommandName="singleDelete" Text="delete" />

            </ItemTemplate>

             <FooterTemplate>

                <asp:Button ID="Button2" runat="server"  CommandName="mutlDelete" Text="deleteAll" />

            </FooterTemplate>

        </asp:DataList>

    </div>

    </form>

</body>

aspx.cs代码

引用

public partial class _234DeleteData : System.Web.UI.Page

    {

        ShowImageBll showImageBll = new BLL.ShowImageBll();

       

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                BindDataList();

            }

        }



        private void BindDataList()

        {

            DataSet ds = showImageBll.GetList();

            DataList1.DataSource = ds;

            DataList1.DataBind();

        }

        protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)

        {

          switch (e.CommandName)

            {

                case "singleDelete":

                    int id = int.Parse(DataList1.DataKeys[e.Item.ItemIndex].ToString());

                    if (showImageBll.GetList()!=null)

                    {

                        showImageBll.DeleteSingleList(id);

                        Response.Write("<script>alert('删除成功！')</script>");

                        BindDataList();//重新绑定数据库

                    }

                    else 

                    {

                        showImageBll.DeleteSingleList(id);

                        Response.Write("<script>alert('删除失败！')</script>");

                    }

                    break;

                case "mutlDelete":



                    DataListItemCollection dlic = DataList1.Items;//创建一个DataList列表项集合对象

                    for (int i = 0; i < dlic.Count; i++)

                    {

                        if (dlic[i].ItemType == ListItemType.AlternatingItem || dlic[i].ItemType == ListItemType.Item)

                        {

                              CheckBox cb=(CheckBox)dlic[i].FindControl("CheckBox1");

                              if (cb.Checked)

                              {

                                  int id1 = int.Parse(DataList1.DataKeys[dlic[i].ItemIndex].ToString());

                                  showImageBll.DeleteSingleList(id1);      

                              }

                        }

                    }

                    BindDataList();//重新绑定数据库

                    break;

                    

          

          }



        }

    }

不起作用，你放到ItemTemplate 里面测试下，另外，你批量删除逻辑有问题！

里面应该是循环的，你这样是批量不了的！ --------------------编程问答-------------------- 不知道楼主点全选的时候页面有没有全部选中？？ --------------------编程问答--------------------

引用 3 楼 itmaxin 的回复:

不知道楼主点全选的时候页面有没有全部选中？？

有啊 --------------------编程问答--------------------

引用 1 楼 guwei4037 的回复:

单步调试看看是值没有取到（全选、反选），还是删除不起作用（DeleteSingleList）。

单步调试执行到if这句就直接跳出来了，不执行if里面的



if (dlic[i].ItemType == ListItemType.AlternatingItem || dlic[i].ItemType == ListItemType.Item)

                        {

                              CheckBox cb=(CheckBox)dlic[i].FindControl("CheckBox1");

                              if (cb.Checked)

                              {

                                  int id1 = int.Parse(DataList1.DataKeys[dlic[i].ItemIndex].ToString());

                                  showImageBll.DeleteSingleList(id1);      

                              }

                        }

--------------------编程问答-------------------- dlic[i].ItemType,type不对，你看看你的是什么type。 --------------------编程问答--------------------

引用 4 楼 abc8023 的回复:

Quote: 引用 3 楼 itmaxin 的回复:

不知道楼主点全选的时候页面有没有全部选中？？
有啊

楼主删除单个可以成功吗？ --------------------编程问答--------------------



if (dlic[i].ItemType == ListItemType.AlternatingItem || dlic[i].ItemType == ListItemType.Item)

                        {

                              CheckBox cb=(CheckBox)dlic[i].FindControl("CheckBox1");

                              if (cb.Checked)

                              {

                                  int id1 = int.Parse(DataList1.DataKeys[dlic[i].ItemIndex].ToString());

                                  showImageBll.DeleteSingleList(id1);      

                              }

                        }

感觉这个外层if可以不要。 --------------------编程问答--------------------

引用 6 楼 guwei4037 的回复:

dlic[i].ItemType,type不对，你看看你的是什么type。

请教应该改成什么 --------------------编程问答--------------------

引用 2 楼 hou306010849 的回复:

Quote: 引用楼主 abc8023 的回复:

批量删除的那个按钮不起作用，请帮忙看一下是怎么回事？
aspx代码

 <script type="text/javascript">

        function CheckAll(Obj) {

             var AllObj = document.all;

             if (Obj.checked)//全选

             {

                 for (var i = 0; i < AllObj.length; i++) {

                     if (AllObj[i].type == "checkbox") {

                         AllObj[i].checked = true;

                     }

                }

             }

            else//反选

            {

                 for (var i = 0; i < AllObj.length; i++) {

                     if (AllObj[i].type == "checkbox") {

                         AllObj[i].checked = false;

                    }

                }

             }

        }

     

     </script>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:DataList ID="DataList1" runat="server" Width="355px" 

            onitemcommand="DataList1_ItemCommand" DataKeyField="id"> 

            <HeaderTemplate>

                <asp:CheckBox ID="CheckBox2" runat="server" onclick="return CheckAll(this)" />

                <asp:Label ID="Label3" Width="70px" runat="server" Text="ID"></asp:Label>

                <asp:Label ID="Label4" Width="170px" runat="server" Text="imageUrl"></asp:Label>

                <asp:Label ID="Label5"  runat="server" Text="handle"></asp:Label>

            </HeaderTemplate>

            <ItemTemplate>

                <asp:CheckBox ID="CheckBox1" runat="server" />

                <asp:Label ID="Label1" Width="70px" runat="server" Text='<%# Eval( "id") %>'></asp:Label>

                <asp:Label ID="Label2" Width="170px" runat="server" Text='<%# Eval("imageUrl") %>'></asp:Label>

                <asp:Button ID="Button1" runat="server" CommandName="singleDelete" Text="delete" />

            </ItemTemplate>

             <FooterTemplate>

                <asp:Button ID="Button2" runat="server"  CommandName="mutlDelete" Text="deleteAll" />

            </FooterTemplate>

        </asp:DataList>

    </div>

    </form>

</body>

aspx.cs代码

引用

public partial class _234DeleteData : System.Web.UI.Page

    {

        ShowImageBll showImageBll = new BLL.ShowImageBll();

       

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                BindDataList();

            }

        }



        private void BindDataList()

        {

            DataSet ds = showImageBll.GetList();

            DataList1.DataSource = ds;

            DataList1.DataBind();

        }

        protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)

        {

          switch (e.CommandName)

            {

                case "singleDelete":

                    int id = int.Parse(DataList1.DataKeys[e.Item.ItemIndex].ToString());

                    if (showImageBll.GetList()!=null)

                    {

                        showImageBll.DeleteSingleList(id);

                        Response.Write("<script>alert('删除成功！')</script>");

                        BindDataList();//重新绑定数据库

                    }

                    else 

                    {

                        showImageBll.DeleteSingleList(id);

                        Response.Write("<script>alert('删除失败！')</script>");

                    }

                    break;

                case "mutlDelete":



                    DataListItemCollection dlic = DataList1.Items;//创建一个DataList列表项集合对象

                    for (int i = 0; i < dlic.Count; i++)

                    {

                        if (dlic[i].ItemType == ListItemType.AlternatingItem || dlic[i].ItemType == ListItemType.Item)

                        {

                              CheckBox cb=(CheckBox)dlic[i].FindControl("CheckBox1");

                              if (cb.Checked)

                              {

                                  int id1 = int.Parse(DataList1.DataKeys[dlic[i].ItemIndex].ToString());

                                  showImageBll.DeleteSingleList(id1);      

                              }

                        }

                    }

                    BindDataList();//重新绑定数据库

                    break;

                    

          

          }



        }

    }

不起作用，你放到ItemTemplate 里面测试下，另外，你批量删除逻辑有问题！

里面应该是循环的，你这样是批量不了的！

逻辑没有问题吧 --------------------编程问答-------------------- 楼主先看看showImageBll.DeleteSingleList(id);这个能起作用不 --------------------编程问答--------------------

引用 11 楼 dotnetstudio 的回复:

楼主先看看showImageBll.DeleteSingleList(id);这个能起作用不

可以 --------------------编程问答-------------------- 楼主的批量删除按钮写在了页脚上，就不是ListItemType其中的类型了而是ListItemType.Footer。自然不能进入if后面的代码了。 --------------------编程问答--------------------

引用 13 楼 q274925416 的回复:

楼主的批量删除按钮写在了页脚上，就不是ListItemType其中的类型了而是ListItemType.Footer。自然不能进入if后面的代码了。

那这句应该怎么样改求指教 --------------------编程问答-------------------- 看这么多代码头就晕了。。。给楼主建议
Firefox---Firebug自己调试去。。

补充：.NET技术 ,  ASP.NET