有關的DataSourceID和DataSource

查詢兩個表是有有關的DataSourceID和DataSource

EmpInf 
    EmpId, 
    EmpName, 
    Salary, 
    DepartNumber. 

Dept 
    DeptNo, 
    Deptname,

我有一個作爲

<asp:LinqDataSource ID="LinqDataSource1" runat="server" EntityTypeName="" 
    ContextTypeName="FilterControl.DataClasses1DataContext" EnableDelete="True" 
    EnableInsert="True" EnableUpdate="True" OrderBy="DeptName" 
    TableName="Dept1s" Select="new (DeptNo, DeptName)"> 
</asp:LinqDataSource>

一個listview

<asp:ListView ID="ListView1" runat="server" DataSourceID="LinqDataSource1" 
    style="z-index: 1; left: 10px; top: 34px; position: absolute; height: 63px; width: 293px" 
    > 
    <AlternatingItemTemplate> 
     <tr style=""> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptNo" Mode="ReadOnly" /> 
      </td> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptName" Mode="ReadOnly" /> 
      </td> 
     </tr> 
    </AlternatingItemTemplate> 
    <EditItemTemplate> 
     <tr style=""> 
      <td> 
       <asp:Button ID="UpdateButton" runat="server" CommandName="Update" 
        Text="Update" /> 
       <asp:Button ID="CancelButton" runat="server" CommandName="Cancel" 
        Text="Cancel" /> 
      </td> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptNo" Mode="Edit" /> 
      </td> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptName" Mode="Edit" /> 
      </td> 
     </tr> 
    </EditItemTemplate> 
    <EmptyDataTemplate> 
     <table runat="server" style=""> 
      <tr> 
       <td> 
        No data was returned.</td> 
      </tr> 
     </table> 
    </EmptyDataTemplate> 
    <InsertItemTemplate> 
     <tr style=""> 
      <td> 
       <asp:Button ID="InsertButton" runat="server" CommandName="Insert" Text="Insert" 
        ValidationGroup="Insert" /> 
       <asp:Button ID="CancelButton" runat="server" CommandName="Cancel" 
        Text="Clear" /> 
      </td> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptNo" Mode="Insert" 
        ValidationGroup="Insert" /> 
      </td> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptName" Mode="Insert" 
        ValidationGroup="Insert" /> 
      </td> 
     </tr> 
    </InsertItemTemplate> 
    <ItemTemplate> 
     <tr style=""> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptNo" Mode="ReadOnly" /> 
      </td> 
      <td> 
       <asp:DynamicControl runat="server" DataField="DeptName" Mode="ReadOnly" /> 
      </td> 
     </tr> 
    </ItemTemplate>

linqdatasource control等，並試圖實現這個listview thorugh動態數據並使用了dynamic data manager control

<asp:DynamicDataManager ID="DynamicDataManager1" runat="server" > 
<DataControls> 
<asp:DataControlReference ControlID="ListView1" /> 
</DataControls> 
</asp:DynamicDataManager>

我已經採取了dropdownlist，勢必EmpInf.Empname，當我從下拉列表中選擇partcular員工姓名我要綁定的部門名稱。

在運行期間，後端

FilterControl.DataClasses1DataContext obj = new DataClasses1DataContext(); 
     protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e) 
     { 



      var a = from r in obj.EmpInfs 
        join s in obj.Dept1s on r.DeptNumber equals s.DeptNo 
        where r.EmpName == DropDownList1.SelectedValue 
        select s.DeptName; 



      ListView1.DataSource = a; 
      ListView1.DataBind(); 



     }

，它拋出一個異常，這說明要麼使用DataSourceID="LinqDataSource1" or use the datasource a the back end. remove one of them.，而這樣做的過程中什麼都不會返回。我該如何讓這個運行，需要建議。感謝您的幫助。以解決

來源

2012-07-04 Abhishek gupta

寫入listview.DatasourceId=null解決。請告訴我。 –

的一種方式是從ListView控件除去的DataSourceID和在Page_Load中綁定數據

protected void Page_Load(object sender, EventArgs e) 
{ 

    if(!Page.IsPostBack) 
    { 
     //Bind datasource to ListView here 
    } 
}

一切應該工作現在

來源

2012-07-04 10:20:18 codingbiz

@ tcoder它工作先生謝謝。 –

FilterControl.DataClasses1DataContext OBJ =新DataClasses1DataContext（）; 保護無效DropDownList1_SelectedIndexChanged1（對象發件人，EventArgs的） {

 var a = from r in obj.EmpInfs 
       join s in obj.Dept1s on r.DeptNumber equals s.DeptNo 
       where r.EmpName == DropDownList1.SelectedValue 
       select s; 


     listview1.DatasourceId=null; 
     ListView1.DataSource = a; 
     ListView1.DataBind(); 



    }

它也可以是通過如果有任何不被理解在上面的代碼

來源

2012-07-04 11:12:05

有關的DataSourceID和DataSource

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