Question

我使用SQL数据库中的数据填充以下DataGrid

<asp:DataGrid ID="dgUsers" BackColor="#F7F9FD" AutoGenerateColumns="false" 
 OnItemCommand="dgItemCommand" runat="server" >
  <Columns>
     <asp:BoundColumn HeaderText="Username" DataField="Username" />
     <asp:BoundColumn HeaderText="First Name" DataField="FirstName" />
     <asp:BoundColumn HeaderText="Last Name" DataField="LastName" />
     <asp:TemplateColumn HeaderText="Details">
        <ItemTemplate>
           <asp:Button runat="server" Text="Open" CommandName="OpenDetails"
                       CommandArgument='<%# Eval("Username")%>' />
        </ItemTemplate>
     </asp:TemplateColumn>
   </Columns>
</asp:DataGrid>

我从数据库中的两个不同的表中获取信息，FirstName和LastName来自一个表，而Username来自另一个表。

    cmd = new SqlCommand("storedProcedure", conn);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.AddWithValue("Email", email);
    cmd.Parameters.AddWithValue("FirstName", first);
    cmd.Parameters.AddWithValue("LastName", last);

    DataSet ds = new DataSet();
    SqlDataAdapter da = new SqlDataAdapter();
    da.SelectCommand = cmd;
    da.Fill(ds);

    dgUsers.DataSource = ds;
    dgUsers.DataBind();

我收到的错误是在所选数据源上找不到名为'FirstName'的字段或属性。因此，它似乎正确获取用户名，但不是FirstName或LastName。我有三倍检查我没有拼写错误，我的表中的字段确实是FirstName和LastName，以及我在下面显示的存储过程。有谁看到我在这里做错了什么？提前感谢您的帮助!!

@Email varchar(MAX),
@FirstName varchar(20),
@LastName varchar(35)

AS

SELECT Username
From AgentLogin.dbo.AgentLogin
WHERE AgentNumID IN (SELECT AgentNumID FROM AgentLogin.dbo.AgentDetail WHERE
      ((CHARINDEX(@FirstName, FirstName) != 0) OR (CHARINDEX(@LastName, LastName) 
      != 0))) OR (CHARINDEX(@Email, Email) != 0)

SELECT FirstName, LastName
From AgentLogin.dbo.AgentDetail
WHERE AgentNumID IN (SELECT AgentNumID FROM AgentLogin.dbo.AgentLogin WHERE
      (CHARINDEX(@Email, Email) != 0)) OR ((CHARINDEX(@FirstName, FirstName) != 0) 
      OR (CHARINDEX(@LastName, LastName) != 0))

Answer 1

我认为你想使用内连接。

SELECT AgentLogin.Username，AgentDetail.FirstName，AgentDetail.LastName 来自订单INNER JOIN AgentLogin ON AgentDetail.AgentNumID = AgentLogin.AgentNumID

在尝试创建存储过程之前，尝试从后面的代码中调用函数中的Select。

protected DataTable getTable()
{
DataTable dt = new DataTable();
StringBuilder cmdText = new StringBuilder();
cmdText.Append("SELECT AgentLogin.Username, AgentDetail.FirstName,    AgentDetail.LastName");
        cmdText.Append("FROM Orders INNER JOIN");
        cmdText.Append("AgentLogin ON AgentDetail.AgentNumID = AgentLogin.AgentNumID ");

return dt;
}

在所选数据源上找不到具有名称的字段或属性

1 个答案: