使用单个事件处理程序处理来自网格的多个删除事件 asp.net

Question

我有两个包含删除按钮的网格，我正在使用 RadAjaxManager，它将触发从客户端到服务器端的 ajax 请求 Onajax包含事件处理程序的请求，该事件处理程序将调用我的删除事件如下：

<telerik:RadAjaxManager ID="RadAjaxManager2" runat="server" meta:resourcekey="RadAjaxManager1Resource1" OnAjaxRequest="RadAjaxManager2_AjaxRequest">
                <AjaxSettings>
                    <telerik:AjaxSetting AjaxControlID="RadAjaxManager2">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="Grid1" />
                            <telerik:AjaxUpdatedControl ControlID="Grid2" />
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                </AjaxSettings>
            </telerik:RadAjaxManager>

 <telerik:RadGrid ID="Grid1" runat="server">
  ---
  ---
  <telerik:GridTemplateColumn HeaderText="Action" UniqueName="Action" HeaderStyle-Width="130px">
                                        <ItemTemplate>
                                     <asp:ImageButton runat="server" ID="Remove1" Text="Delete" OnClientClick='<%# Eval("Id", "javascript:return DeleteData(\"{0}\");") %>' />
                                        </ItemTemplate>
                                    </telerik:GridTemplateColumn>

 <telerik:RadGrid ID="Grid2" runat="server">
  ---
  ---
  <telerik:GridTemplateColumn HeaderText="Action" UniqueName="Action" >
                                        <ItemTemplate>
                                     <asp:ImageButton runat="server" ID="Remove2" Text="Delete" OnClientClick='<%# Eval("Id", "javascript:return DeleteData(\"{0}\");") %>' />
                                        </ItemTemplate>
                                    </telerik:GridTemplateColumn>



 function DeleteData(Id) {
   var ajaxManager = null;
   var action = 'Remove';
   ajaxManager = $find("ctl00_cphMain_RadAjaxManager2");
   var arg = action + "," + Id; //Remove,1(1 indicates id of record to remove from grid)
   ajaxManager.ajaxRequest(arg);This line will fire below method.
  }



public event EventHandler RemoveEvent;
protected void RadAjaxManager2_AjaxRequest(object sender, AjaxRequestEventArgs e)
        {
            var argument = (e.Argument);
            var stringArray = argument.Split(",".ToCharArray());//[0]="Remove",[1]=1
            if (stringArray[0] == "Remove")
            {
                RemoveEvent(stringArray[1], null);
            }
        }

在此之后它会这样调用：

protected void Page_Load(object sender, EventArgs e)
        {
            this.RemoveEvent += Remove1_Click;
            this.RemoveEvent += Remove2_Click;
            if (!IsPostBack)
            {
            }
         }

protected void Remove1_Click(object sender, object obj)
        {
        }
protected void Remove2_Click(object sender, object obj)
        {
        }

这里的问题是这两个事件都在调用，但我只想在单击 Remove1 和 Remove2 按钮时调用单个删除事件。

Answer 1

您只需使用 RadGrid_ItemCommand 并使用 del 按钮传递命令参数，并更改命令名称以删除她的示例代码

<telerik:GridTemplateColumn HeaderText="Actions">
                                        <ItemTemplate>
                                            <asp:ImageButton ID="Button3" Style="width: 14px" Height="14px" ImageUrl="~/Images/Erase.png" runat="server" Text="Delete1" OnClientClick="return confirm('Are you sure you want to delete this item?');" CommandName="Delete1" CommandArgument='<%# Eval("Pid") %>' />
                                            &nbsp &nbsp
 <asp:ImageButton ID="Button3" Style="width: 14px" Height="14px" ImageUrl="~/Images/Erase.png" runat="server" Text="Delete2" OnClientClick="return confirm('Are you sure you want to delete this item?');" CommandName="Delete2" CommandArgument='<%# Eval("Pid") %>' />

                                        </ItemTemplate>
                                    </telerik:GridTemplateColumn>



    protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)
{
    if (e.CommandName == "Delete1")
    {

    }
if (e.CommandName == "Delete2")
    {

    }

}

Answer 2

您不需要订阅 code-behind 中的事件，即不需要 this.RemoveEvent+=。而是编写一个名为 RemoveRecord(buttonId, recordId) 的方法。我已经以 step-by-step 的方式解释了这种方法，如下所示。

首先更改 OnClientClick 的标记。请注意，我们会将要删除的记录的 ID 以及被单击按钮的 server-side id 传递给 JavaScript 函数 DeleteData.

OnClientClick='<%# Eval("Id", "DeleteData('{0}', 'Remove1'); return false;") %>'   

OnClientClick='<%# Eval("Id", "DeleteData('{0}', 'Remove2'); return false;") %>'

更改JavaScript Delete 方法。请注意，我们现在正在传递 server-side 按钮 ID，因此在 code-behind 中我们可以轻松知道单击了哪个按钮。

function DeleteData(Id, buttonId) {
  var ajaxManager = null;
  ajaxManager = $find("<%=RadAjaxManager2.ClientID%>");
  var arg = buttonId + "," + Id; //Remove1,1 (1 indicates id of record to remove from grid)
  ajaxManager.ajaxRequest(arg);//This line will fire below method.
}

在隐藏代码中，包含一个 RemoveRecord 方法，无需像在原始代码中那样创建事件处理程序。因此，您应该从原始代码中删除以下方法：Remove1_Click 和 Remove2_Click，并删除 Page_Load 中订阅点击事件的代码。

protected void RadAjaxManager2_AjaxRequest(object sender, AjaxRequestEventArgs e)
{
 var stringArray = e.Argument.Split(",".ToCharArray());//[0]="Remove1" or "Remove2",[1]=id of record to delete
 RemoveRecord( stringArray[0], stringArray[1]);
}

//the method below will delete data
private void RemoveRecord( buttonId, recordId) 
{
 if(buttonId== "Remove1")
  {
    //code to delete record with id of recordId
  } 
 else if ( buttonId == "Remove2")
  {
    //code to delete record with id of recordId
  }
}

另一种方法

如果你必须在parent页面中有RadAjaxManager2_AjaxRequest并在child页面中删除方法，则在标题中提到的适当位置添加以下代码。 但请注意，上述方法中提到的标记更改和JavaScript功能更改也适用于此方法。

在Parent页面中（就在class之外）

public class RemoveEventArgs : EventArgs
{
public RemoveEventArgs ( string buttonId, string recordId)
{
   this.ButtonId = buttonId;
   this.RecordId = recordId;
}
    public string ButtonId {get;set;}
    public string RecordId {get;set;}
}

此外，在同一 parent 页面中，将方法 RadAjaxManager2_AjaxRequest 更改为下面给出的内容。

在Parent页面中（更改此现有方法）

 protected void RadAjaxManager2_AjaxRequest(object sender, AjaxRequestEventArgs e)
 {
            var stringArray = e.Argument.Split(",".ToCharArray());//[0]="Remove1",[1]=1 OR [0]="Remove2", [1] = 212
            if (stringArray[0] == "Remove1"  || stringArray[0] == "Remove2")
            {
                 if(RemoveEvent!=null) 
                 {
                   RemoveEvent(this, new RemoveEventArgs(stringArray[0], stringArray[1]));
                 }
            }
 }

在 Child 页面中（更改现有方法）

protected void Remove1_Click(object sender, RemoveEventArgs obj)
  {
    if( obj!=null && obj.ButtonId == "Remove1") 
    {
      string recordId = obj.RecordId;
      //write your code for deleting


    }
  }
protected void Remove2_Click(object sender, RemoveEventArgs obj)
 {
  if( obj!=null && obj.ButtonId == "Remove2") 
    {
      string recordId = obj.RecordId;
      //write your code for deleting


    }
 }

使用单个事件处理程序处理来自网格的多个删除事件 asp.net

Handle multiple delete events from grid with single events handlers asp.net

c#

asp.net

telerik-grid

eventhandler

radajaxmanager