與名稱的字段或屬性「ApproveID」未選擇的數據源

Question

我嘗試添加在下拉列表批准類型值grdiview

的GridView

<asp:BoundField HeaderText="ApproveID" DataField="ApproveID"></asp:BoundField> 
      <asp:TemplateField> 
       <ItemTemplate> 


        <asp:DropDownList ID="DropDownList4" runat="server" 
        class="vpb_dropdown"> 
        </asp:DropDownList> 
       </ItemTemplate> 
      </asp:TemplateField> 

SQL

上找到

ALTER procedure [dbo].[viewdocid] 
as 
select dbo.DocumentInfo.DocID,dbo.DocumentInfo.DocName,dbo.DocumentInfo.Uploadfile,dbo.DocType.DocType,dbo.Department.DepType 
from dbo.DocumentInfo left join dbo.DocType on dbo.DocumentInfo.DocTypeID=dbo.DocType.DocTypeID left join 
dbo.Department on dbo.DocumentInfo.DepID=dbo.Department.DepID 

C＃

protected void OnRowDataBound(object sender, GridViewRowEventArgs e) 
    { 
     if (e.Row.RowType == DataControlRowType.DataRow) 
     { 
      //Find the DropDownList in the Row 
      DropDownList ddlvalue = (e.Row.FindControl("DropDownList4") as 
      DropDownList); 
      ddlvalue .DataSource = GetData("SELECT ApproveID,ApproveType FROM 
      ApproveType"); 
      ddlvalue .DataTextField = "ApproveType"; 
      ddlvalue .DataValueField = "ApproveID"; 
      ddlvalue .DataBind(); 

      //Add Default Item in the DropDownList 
      ddlvalue.Items.Insert(0, new ListItem("Please select")); 

      //Select the Country of Customer in DropDownList 
      //string country = (e.Row.FindControl("lblCountry") as Label).Text; 
      //ddlvalue.Items.FindByValue(country).Selected = true; 
     } 
    } 

我在頁面加載

  GrdFileApprove.DataSource = dd.gdocid(); 
      GrdFileApprove.DataBind(); 

地方，因爲在文件表中沒有approveid列，這是隻有在審批表中添加該代碼。 我試圖說明approve.reject和GridView控件在下拉列表未決

當我調試代碼它告訴我在頁面加載代碼錯誤..

A field or property with the name 'ApproveID' was not found on the selected data source. 

Answer 1

您綁定到網格視圖不包含列Arrpove類型。所以很明顯，你會得到錯誤的數據源。

您需要通過使用表之間的連接來獲取Approve id。

網格視圖只能容納一個結果在時間

ALTER procedure [dbo].[viewdocid] 
as 
select A.ApproveID,A.ApproveType dbo.DocumentInfo.DocID,dbo.DocumentInfo.DocName,dbo.DocumentInfo.Uploadfile,dbo.DocType.DocType,dbo.Department.DepType 
from dbo.DocumentInfo left join dbo.DocType on dbo.DocumentInfo.DocTypeID=dbo.DocType.DocTypeID left join 
dbo.Department on dbo.DocumentInfo.DepID=dbo.Department.DepID 
left join dbo.ApproveType A on dbo.DocumentInfo.DocID=A.Approvetype 

希望這有助於設定..

Answer 2

你需要有ApproveID列存在在結果集中。也就是說，包括SELECT中的列。如果是在接合表，你需要做的是這樣的：

select [JoinedTable].[Column] AS ApproveID ...