关于DataList 中的UpdateCommand 和CancelCommand 事件不执行的问题

xinganna 2007-11-07 11:42:52
protected override void InitializeSkin(System.Web.UI.Control skin)
{
dlManageRanks = (DataList)skin.FindControl("dlManageRanks");

this.dlManageRanks.EditCommand += new DataListCommandEventHandler(dlManageRanks_EditCommand);
this.dlManageRanks.CancelCommand += new DataListCommandEventHandler(dlManageRanks_CancelCommand);
this.dlManageRanks.DeleteCommand += new DataListCommandEventHandler(dlManageRanks_DeleteCommand);
this.dlManageRanks.UpdateCommand += new DataListCommandEventHandler(dlManageRanks_UpdateCommand);
this.dlManageRanks.ItemCommand += new DataListCommandEventHandler(dlManageRanks_ItemCommand);

// Put user code to initialize the page here
this.dlManageRanks.DataSource = Ranks.GetRanks();

//if (!Page.IsPostBack)
dlManageRanks.DataBind();
}
private void dlManageRanks_CancelCommand(object source, DataListCommandEventArgs e)
{
this.dlManageRanks.EditItemIndex = -1;
dlManageRanks.DataBind();
}

private void dlManageRanks_UpdateCommand(object source, DataListCommandEventArgs e)
{
TextBox txtRankName = (TextBox)e.Item.FindControl("txtRankName");
TextBox txtRankCountMin = (TextBox)e.Item.FindControl("txtRankMinPost");
TextBox txtRankCountMax = (TextBox)e.Item.FindControl("txtRankMaxPost");
TextBox txtRankIconUrl = (TextBox)e.Item.FindControl("txtRankIconUrl");

if (txtRankName == null
|| txtRankCountMin == null
|| txtRankCountMax == null
|| txtRankIconUrl == null)
return;

AspNetForums.Components.Rank r = (Rank)((ArrayList)dlManageRanks.DataSource)[e.Item.ItemIndex];

r.RankName = txtRankName.Text;
r.PostingCountMinimum = Int32.Parse(txtRankCountMin.Text);
r.PostingCountMaximum = Int32.Parse(txtRankCountMax.Text);
r.RankIconUrl = txtRankIconUrl.Text;

Ranks.UpdateRank(r);

dlManageRanks.EditItemIndex = -1;
dlManageRanks.DataBind();
}
......dlManageRanks_ItemCommand dlManageRanks_EditCommand dlManageRanks_DeleteCommand都能正常执行,可就是UpdateCommand 和CancelCommand 事件不执行,为什么?急!!!谢谢大家
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zjn090114122 2010-12-30
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跪求啊~~，我也是同样的问题。
symbol441 2007-11-09
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呵呵,问题解决了就好,说实话你这个问题我还真是纳闷呢,只有部分事件不能触发.
xinganna 2007-11-09
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问题解决了,是EditCommand状态丢了,我强制打开就好了,哈,谢谢大家了,结贴了
symbol441 2007-11-08
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private   void   dlManageRanks_ItemCommand(object   source,   DataListCommandEventArgs   e) 

                { 

                        if(e.CommandName   ==   "Create ") 

                                CreateCommand(source,   e); 

                        if(e.CommandName   ==   "update ") 

                                this.Updatecommand(source,   e); 

                        if(e.CommandName   ==   "cancel ") 

                        { 

                                this.dlManageRanks.EditItemIndex   =   -1; 

                                dlManageRanks.DataBind(); 

                        } 

                }
xinganna 2007-11-07
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我是05的程序,跟踪调试了，dlManageRanks_ItemCommand dlManageRanks_EditCommand dlManageRanks_DeleteCommand都能正常执行,可就是UpdateCommand 和CancelCommand 事件不执行,点击"更新"后走加载
protected override void InitializeSkin(System.Web.UI.Control skin)
{
dlManageRanks = (DataList)skin.FindControl( "dlManageRanks ");

this.dlManageRanks.EditCommand += new DataListCommandEventHandler(dlManageRanks_EditCommand);
this.dlManageRanks.CancelCommand += new DataListCommandEventHandler(dlManageRanks_CancelCommand);
this.dlManageRanks.DeleteCommand += new DataListCommandEventHandler(dlManageRanks_DeleteCommand);
this.dlManageRanks.UpdateCommand += new DataListCommandEventHandler(dlManageRanks_UpdateCommand);
this.dlManageRanks.ItemCommand += new DataListCommandEventHandler(dlManageRanks_ItemCommand);

// Put user code to initialize the page here
this.dlManageRanks.DataSource = Ranks.GetRanks();

//if (!Page.IsPostBack)
dlManageRanks.DataBind();
}
然后直接跳出!结束了
kings2015 2007-11-07
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跟踪调试一下 你这是03的吧
xinganna 2007-11-07
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恳请高人指点!!!
本人急等,在线等,解决立刻给分~~~~~~
xinganna 2007-11-07
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我当然知道没触发,要怎么解决?
bumm 2007-11-07
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没有触发
xinganna 2007-11-07
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后台CS文件,同志们在帮忙看看啊,为什么(编辑 删除操作可以触发itemCommand事件) (更新 取消操作总是不触发itemCommand事件)



    public class ManageRanks : SkinnedForumWebControl

    {

        protected string skinFileName = "/Admin/skin-ManageRanks.ascx";

        protected AspNetForums.Components.SiteSettings settings;



        protected string selectedName = string.Empty;

        DataList dlManageRanks;





        public ManageRanks()

        {

            if (SkinFilename == null)

                SkinFilename = skinFileName;

        }



        protected override void InitializeSkin(System.Web.UI.Control skin)

        {

            dlManageRanks = (DataList)skin.FindControl("dlManageRanks");



            this.dlManageRanks.EditCommand += new DataListCommandEventHandler(dlManageRanks_EditCommand);

            this.dlManageRanks.CancelCommand += new DataListCommandEventHandler(dlManageRanks_CancelCommand);

            this.dlManageRanks.DeleteCommand += new DataListCommandEventHandler(dlManageRanks_DeleteCommand);

            this.dlManageRanks.UpdateCommand += new DataListCommandEventHandler(dlManageRanks_UpdateCommand);

            this.dlManageRanks.ItemCommand += new DataListCommandEventHandler(dlManageRanks_ItemCommand);



            // Put user code to initialize the page here

            this.dlManageRanks.DataSource = Ranks.GetRanks();



            //if (!Page.IsPostBack)

                dlManageRanks.DataBind();

        }



        private void dlManageRanks_EditCommand(object source, DataListCommandEventArgs e)

        {

            this.dlManageRanks.EditItemIndex = e.Item.ItemIndex;

            dlManageRanks.DataBind();

        }



        private void dlManageRanks_CancelCommand(object source, DataListCommandEventArgs e)

        {

            this.dlManageRanks.EditItemIndex = -1;

            dlManageRanks.DataBind();

        }



        private void dlManageRanks_DeleteCommand(object source, DataListCommandEventArgs e)

        {

            Rank rank = (Rank)((ArrayList)dlManageRanks.DataSource)[e.Item.ItemIndex];



            Ranks.DeleteRank(rank);



            dlManageRanks.EditItemIndex = -1;

            //dlManageRanks.DataBind();

            Reload();

        }



        private void dlManageRanks_UpdateCommand(object source, DataListCommandEventArgs e)

        {

            TextBox txtRankName = (TextBox)e.Item.FindControl("txtRankName");

            TextBox txtRankCountMin = (TextBox)e.Item.FindControl("txtRankMinPost");

            TextBox txtRankCountMax = (TextBox)e.Item.FindControl("txtRankMaxPost");

            TextBox txtRankIconUrl = (TextBox)e.Item.FindControl("txtRankIconUrl");



            if (txtRankName == null

            || txtRankCountMin == null

            || txtRankCountMax == null

            || txtRankIconUrl == null)

                return;



            AspNetForums.Components.Rank r = (Rank)((ArrayList)dlManageRanks.DataSource)[e.Item.ItemIndex];



            r.RankName = txtRankName.Text;

            r.PostingCountMinimum = Int32.Parse(txtRankCountMin.Text);

            r.PostingCountMaximum = Int32.Parse(txtRankCountMax.Text);

            r.RankIconUrl = txtRankIconUrl.Text;



            Ranks.UpdateRank(r);



            dlManageRanks.EditItemIndex = -1;

            dlManageRanks.DataBind();

        }



        private void dlManageRanks_ItemCommand(object source, DataListCommandEventArgs e)

        {

            if (e.CommandName == "Create")

                CreateCommand(source, e);



        }



        private void CreateCommand(object source, DataListCommandEventArgs e)

        {

            TextBox txtRankName = (TextBox)e.Item.FindControl("txtNewRankName");

            TextBox txtRankCountMin = (TextBox)e.Item.FindControl("txtNewRankMinPost");

            TextBox txtRankCountMax = (TextBox)e.Item.FindControl("txtNewRankMaxPost");

            TextBox txtRankIconUrl = (TextBox)e.Item.FindControl("txtNewRankIconUrl");



            if (txtRankName == null

                || txtRankCountMin == null

                || txtRankCountMax == null

                || txtRankIconUrl == null)

                return;



            Rank rank = new Rank(0, txtRankName.Text, Int32.Parse(txtRankCountMin.Text), Int32.Parse(txtRankCountMax.Text), txtRankIconUrl.Text);



            Ranks.CreateRank(rank);



            //DataBind();

            Reload();

        }

        private void Reload()

        {

            HttpContext.Current.Response.Redirect(Globals.GetSiteUrls().AdminManageRanks, true);

        }

    }
xinganna 2007-11-07
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前台写成了用户控件Ranks.ascx


<span class="forumName">

    <% = ResourceManager.GetString("Rank_Title")%>

</span>

<br>

<span class="forumThread">

    <% = ResourceManager.GetString("Rank_SubTitle")%>

</span>

<br>

<br>

<asp:DataList ID="dlManageRanks" runat="server" Width="100%" Height="100%">

    <HeaderTemplate>

        <table id="tblManageRanks" class="tableBorder" cellspacing="1" cellpadding="3" border="0">

            <tr>

                <td class="column" width="75px">

                    <% = ResourceManager.GetString("ID") %>

                </td>

                <td class="column" width="65px">

                    <% = ResourceManager.GetString("Name")%>

                </td>

                <td class="column" width="80px">

                    <% = ResourceManager.GetString("Rank_MinPosts")%>

                </td>

                <td class="column" width="80px">

                    <% = ResourceManager.GetString("Rank_MaxPosts")%>

                </td>

                <td class="column" width="100px">

                    <% = ResourceManager.GetString("Rank_IconUrl")%>

                </td>

                <td class="column" width="130px" nowrap>

                    <% = ResourceManager.GetString("Actions")%>

                </td>

            </tr>

    </HeaderTemplate>

    <FooterTemplate>

        <tr>

            <td class="f">

                <% = ResourceManager.GetString("ID")%>

            </td>

            <td class="fh">

                <asp:TextBox runat="server" ID="txtNewRankName" Columns="10"></asp:TextBox></td>

            <td class="fh">

                <asp:TextBox runat="server" ID="txtNewRankMinPost" Columns="10"></asp:TextBox></td>

            <td class="fh">

                <asp:TextBox runat="server" ID="txtNewRankMaxPost" Columns="10"></asp:TextBox></td>

            <td class="fh">

                <asp:TextBox runat="server" ID="txtNewRankIconUrl" Columns="40"></asp:TextBox></td>

            <td class="fh">

                <asp:Button ID="CreateSmiley" CommandName="Create" Width="60" Text='<%# ResourceManager.GetString("Create")%>'

                    runat="server"></asp:Button>

            </td>

        </tr>

        </TABLE>

    </FooterTemplate>

    <ItemTemplate>

        <tr>

            <td class="f">

                <%# DataBinder.Eval(Container.DataItem, "RankId") %>

            </td>

            <td class="fh">

                <%# DataBinder.Eval(Container.DataItem, "RankName") %>

            </td>

            <td class="fh">

                <%# DataBinder.Eval(Container.DataItem, "PostingCountMinimum") %>

            </td>

            <td class="fh">

                <%# DataBinder.Eval(Container.DataItem, "PostingCountMaximum") %>

            </td>

            <td class="fh">

                <asp:Image runat="server" AlternateText='<%# DataBinder.Eval(Container.DataItem, "RankIconUrl") %>'

                    ImageUrl='<%# Globals.GetSkinPath() + "/images/" + DataBinder.Eval(Container.DataItem, "RankIconUrl") %>'

                    ID="Image1" />

            </td>

            <td class="fh">

                <asp:Button ID="EditRank" CommandName="Edit" runat="server" Width="60" Text='<%# ResourceManager.GetString("Edit")%>'>

                </asp:Button>

                <asp:Button ID="DeleteRank" CommandName="Delete" runat="server" Width="60" Text='<%# ResourceManager.GetString("Delete")%>'>

                </asp:Button>

            </td>

        </tr>

    </ItemTemplate>

    <EditItemTemplate>

        <tr>

            <td class="f">

                <%# DataBinder.Eval(Container.DataItem, "RankId") %>

            </td>

            <td class="fh">

                <asp:TextBox ID="txtRankName" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "RankName") %>'>

                </asp:TextBox></td>

            <td class="fh">

                <asp:TextBox ID="txtRankMinPost" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "PostingCountMinimum") %>'>

                </asp:TextBox></td>

            <td class="fh">

                <asp:TextBox ID="txtRankMaxPost" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "PostingCountMaximum") %>'>

                </asp:TextBox></td>

            <td class="fh">

                <asp:TextBox ID="txtRankIconUrl" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "RankIconUrl") %>'>

                </asp:TextBox></td>

            <td class="fh">

                <asp:Button ID="UpdateRank" Text='<%# ResourceManager.GetString("Update")%>' runat="server"

                    CommandName="update" Width="60"></asp:Button>

                <asp:Button ID="CancelRank" Text='<%# ResourceManager.GetString("Cancel")%>' runat="server"

                    CommandName="cancel" Width="60"></asp:Button></td>

        </tr>

    </EditItemTemplate>

</asp:DataList>
he_yang9999 2007-11-07
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盗版的换控件吧！~
symbol441 2007-11-07
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楼主参考一下








 private void bind()

    { 

        db sdb = new db();

        DataList1.DataSource = sdb.dt("select top 10 * from authors");

        DataList1.DataKeyField = "au_id";

        DataList1.DataBind();

        

    }

    protected void DataList1_EditCommand(object source, DataListCommandEventArgs e)

    {

        DataList1.EditItemIndex = e.Item.ItemIndex;

        bind();

    }

    protected void DataList1_CancelCommand(object source, DataListCommandEventArgs e)

    {

        DataList1.EditItemIndex = -1;

        bind();

    }

    protected void DataList1_DeleteCommand(object source, DataListCommandEventArgs e)

    {

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

        db sdb = new db();

        string query="delete from authors where au_id='"+id+"'";

        if (sdb.sql(query) > 0)

        {

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

            DataList1.EditItemIndex = -1;

            bind();

        }

    }

    protected void DataList1_UpdateCommand(object source, DataListCommandEventArgs e)

    {

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

        string fname = ((TextBox)e.Item.FindControl("TextBox2")).Text;

        string city = ((TextBox)e.Item.FindControl("TextBox3")).Text;

        db sdb = new db();

        string query="update authors set au_fname='"+fname+"',city='"+city+"' where au_id='"+id+"'";

        if (sdb.sql(query) > 0)

        {

            DataList1.EditItemIndex = -1;

            bind();

        }

      }
symbol441 2007-11-07
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楼主参考一下


<asp:DataList ID="DataList1" runat="server" BackColor="White" BorderColor="#999999"

            BorderStyle="None" BorderWidth="1px" CellPadding="3" DataKeyField="au_id" GridLines="Vertical"

            HorizontalAlign="Center" OnCancelCommand="DataList1_CancelCommand" OnDeleteCommand="DataList1_DeleteCommand"

            OnEditCommand="DataList1_EditCommand" OnUpdateCommand="DataList1_UpdateCommand"

            RepeatColumns="5" RepeatDirection="Horizontal">

            <FooterStyle BackColor="#CCCCCC" ForeColor="Black" />

            <SelectedItemStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />

            <ItemTemplate>

                au_id:

                <asp:Label ID="au_idLabel" runat="server" Text='<%# Eval("au_id") %>'></asp:Label><br />

                au_fname:

                <asp:Label ID="au_fnameLabel" runat="server" Text='<%# Eval("au_fname") %>'></asp:Label><br />

                city:

                <asp:Label ID="cityLabel" runat="server" Text='<%# Eval("city") %>'></asp:Label><br />

                <br />

                <asp:LinkButton ID="LinkButton1" runat="server" CommandName="edit">修改</asp:LinkButton> 

                <asp:LinkButton ID="LinkButton2" runat="server" CommandName="delete">删除</asp:LinkButton>

            </ItemTemplate>

            <EditItemTemplate>

                au_id: 

                <asp:Label ID="Label1" runat="server" Text='<%# Eval("au_id") %>'></asp:Label><br />

                au_fname: 

                <asp:TextBox ID="TextBox2" runat="server" Text='<%# Eval("au_fname") %>'></asp:TextBox><br />

                city:

                <asp:TextBox ID="TextBox3" runat="server" Text='<%# Eval("city") %>'></asp:TextBox><br />

                <br />

                <asp:LinkButton ID="LinkButton3" runat="server" CommandName="update">保存</asp:LinkButton> 

                <asp:LinkButton ID="LinkButton4" runat="server" CommandName="cancel">取消</asp:LinkButton>

            </EditItemTemplate>

            <AlternatingItemStyle BackColor="Gainsboro" />

            <ItemStyle BackColor="#EEEEEE" ForeColor="Black" />

            <HeaderTemplate>

            </HeaderTemplate>

            <HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" />

            <FooterTemplate>

            </FooterTemplate>

        </asp:DataList>
xinganna 2007-11-07
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自己顶一下,这贴不能沉底呀~~~~~~高手们帮忙啊~~~~~
xinganna 2007-11-07
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我的程序的问题可能没跟大家说清楚,一开始加载是个列表,最后两列是按钮
1 小李 男 23 编辑 删除
**********************************当点击"编辑"各列变为文本眶,(编辑 删除操作可以触发itemCommand事件)
2 小王 女 24 更新 取消
*********************************当点击"更新 "时,存如数据库,(更新 取消操作总是不触发itemCommand事件)
我已经将程序修改为
private void dlManageRanks_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "Create")
CreateCommand(source, e);
else if (e.CommandName == "update")
this.Updatecommand(source, e);
else if (e.CommandName == "cancel")
{
this.dlManageRanks.EditItemIndex = -1;
dlManageRanks.DataBind();
}
}
不知道是那里的原因!!!!问题出在那里?
symbol441 2007-11-07
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打错,是半年前..
symbol441 2007-11-07
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在半夜前我也遇到了楼主同样的问题,后来查询了很多资料
最后得到的答案就是UpdateCommand 和CancelCommand 事件,根本就是DataList事件的鸡肋摆设
害的我忙活了,半天,最后把事件全部写在了
protected void dList_ItemCommand(object source, DataListCommandEventArgs e)
{

}
中来实现功能的,通过e.CommandName在itemCommand中来进行处理
eg,根据e.CommandName=="Cancel"来写相应的取消事件代码
希望这可以给楼主一些帮助哈..

lishijie910123 2007-11-07
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路过，
顶一下
DataList控件详细用法(一)
使用DataList控件 本章内容： 1、理解事件冒泡 2、使用模板 3、在DataList中显示数据 4、在DataList中创建多列 5、捕获DataList控件中产生的事件 6、选择DataList中的项 7、使用DataList控件中的Data
asp 为 datalist 添加 增删改 事件
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DataList控件的使用
DataList控件的使用 使用DataList控件 <br />本章内容： <br />Ø 1、理解事件冒泡 <br />Ø 2、使用模板 <br />Ø 3、在DataList中显示数据 <br />Ø 4、在DataList中创建多列 ...
Datalist控件的详细用法(一)
使用DataList控件  本章内容：   1、理解事件冒泡   2、使用模板   3、在DataList中显示数据 ...5、捕获DataList控件中产生的事件   6、选择DataList中的项   7、使用DataList控件中的DataKe
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