网格视图:使用commanArgument传递多个值 [英] grid view : Pass more than one value with commanArgument

问题描述

我要做的就是，当我单击链接按钮时，将两个值传递给后面的代码.

ASPX代码:

 <   asp:GridView     ID   ="   ="span>    runat   =" 服务器"  OnPageIndexChanging    EmpgridView_PageIndexChanging"  DataKeyNames   ="  > ; 
<  列 > 
<   asp:TemplateField     HeaderText   ="   ItemStyle-Horizo​​ntalAlign     HeaderStyle-Font-Underline   ="  > 
<   ItemTemplate  > 
<   asp:LinkBut​​ton     ID   ="   runat   服务器" 文本  <％ #Eval(" )％>'  CommandArgument   ='  <％#Eval(  Comp_Id")+  ;" + Eval(  MS_User_Id")％ >'    OnClick   ="  Emp_Name_Click" / > 
<  /ItemTemplate  > 
<  /asp:TemplateField  > 
 <  /列 > 
<  /asp:GridView  >  

 受保护的 子 Emp_Name_Click( ByVal 发​​件人 As  对象， ByVal  e  As  EventArgs)
        Dim  b  As  LinkBut​​ton =  DirectCast (发送方，LinkBut​​ton)

        Dim 参数 As   String  = b.CommandArgument
        Dim  args  As  字符串()=参数.Split("  c)

        Dim  Comp_id  As  string = args( 0  )
        Dim  Ms_User_Id  As  字符串 = args( 1 )
结束 子

错误:从字符串;"转换键入"Double"无效. "CommandArgument =''<％#Eval(" Comp_Id)+";"+ Eval(" MS_User_Id)％>''""


我试图在CommandArgument上传递两个值，但是当我单击它时，会出现上述错误.

解决方案

您可以将行索引作为命令参数传递并获取行后面代码中的rowcommand事件中的数字，并访问整个GridViewRow.查看您的代码，您需要在gridview中添加一些额外的列，例如name，comp_id，ms_user_id，如果您不希望其可见，则只需隐藏这些列即可.

 <   asp:templatefield    标题文字  ="    控件 样式 -宽度  ="  可见  ="     xmlns:asp   =" #unknown" <   itemtemplate  > 
 <   asp:button     id   ="   runat   服务器" 文本  编辑行" 命令参数  =" <％#((GridViewRow)Container).RowIndex％> ;" 命令名   AddLine" / > 
 <  /itemtemplate  > 
 <  控件 样式   宽度  ="  100％" <  样式 > 
 <  /asp:templatefield  >  

在rowcommand事件中的代码背后

 如果(例如，CommandName == <" )
{
      int  index =  Int32  .Parse(e.CommandArgument.ToString());
     GridViewRow行= grdViewJobDetail.Rows [index];
     字符串 empName = row.Cells [ 0 ].Text.Trim();
}

看这个< asp:GridView id = " DataKeyNames = " Comp_Id，MS_User_Id"

 GridView1.DataKeys(RowIndex).Values(" );

GridView1.DataKeys(RowIndex).Values(" ); 

您可以按照solution1获取rowindex.我已经投票了.您可以使用此解决方案来获取rowindex，而不是使用行索引，可以像我描述的那样通过datakey获取值

All I Want to do is , when i click on link button pass two values to code behind.

ASPX CODE:

<asp:GridView ID="DataviewEmployee" runat="server" OnPageIndexChanging="EmpgridView_PageIndexChanging" DataKeyNames="Comp_Id, MS_User_Id,Name ">
<Columns>
<asp:TemplateField HeaderText="Employee Name" ItemStyle-HorizontalAlign="left" HeaderStyle-Font-Underline="true">
<ItemTemplate>
<asp:LinkButton ID="Emp_Name" runat="server" Text='<%#Eval("Name")%>' CommandArgument='<%# Eval("Comp_Id") + ";"  + Eval("MS_User_Id") %>' OnClick="Emp_Name_Click" />
</ItemTemplate>
</asp:TemplateField>
 </Columns>
</asp:GridView>

Protected Sub Emp_Name_Click(ByVal sender As Object, ByVal e As EventArgs)
       Dim b As LinkButton = DirectCast(sender, LinkButton)

       Dim arguments As String = b.CommandArgument
       Dim args As String() = arguments.Split(";"c)

       Dim Comp_id As string= args(0)
       Dim Ms_User_Id As String = args(1)
End Sub

ERROR: Conversion from string ";" to type ''Double'' is not valid. "CommandArgument=''<%# Eval("Comp_Id") + ";" + Eval("MS_User_Id") %>''"


I am trying to pass two value on CommandArgument , but when i click on it give above error.

解决方案

You can pass row index as the command argument and get the row number in rowcommand event in codebehind and access the whole GridViewRow. Looking at your code you need to add few extra colums to your gridview like name,comp_id,ms_user_id and if you don''t want it to be visible just hide those columns.

<asp:templatefield headertext="Edit" controlstyle-width="100%" visible="false" xmlns:asp="#unknown">
 <itemtemplate>
 <asp:button id="btnEdit" runat="server" text="Edit Line" commandargument="<%#((GridViewRow)Container).RowIndex%>" commandname="AddLine" />
 </itemtemplate>
 <controlstyle width="100%"></controlstyle>
 </asp:templatefield>

In your codebehind in rowcommand event

 if(e.CommandName=="AddLine")
{
     int index = Int32.Parse(e.CommandArgument.ToString());
     GridViewRow row = grdViewJobDetail.Rows[index];
     string empName = row.Cells[0].Text.Trim();
}

look this CodeProject Frequently Asked Questions Series 1: The ASP.NET GridView[^]

u can use datakey for this purpose for this you have to get rowindex to get value of datakey. and you have also used datakey.

<asp:GridView
        id="GridView1"  DataKeyNames="Comp_Id,MS_User_Id"

GridView1.DataKeys(RowIndex).Values("Comp_Id");

GridView1.DataKeys(RowIndex).Values("MS_User_Id");

u can get rowindex as per solution1. and i have upvote it. u can use this solution to get rowindex than using row index u can get value by datakey as i describe

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