EntityDataSource查询内部联接 [英] EntityDataSource query inner join

问题描述

我有3个表一个DB：

User{UserId,UserName}
Role{RoleId,RoleName}
User_Role{UserId,RoleId}

本查询：

int userIdPassByUrl = 0;
MyDbContext ctx = new MyDbContext();
var query = (from role in ctx.Role
        join userRole in ctx.User_Role on role.RoleId equals userRole.RoleId
        where userRole.UserId == userIdPassByUrl
        select new { role.RoleId, role.RoleName }).Distinct();

我需要显示在一个EntityDataSource的GridView上面查询的结果，无论是代码或设置它在设计模式

I need to show the result of the above query in a Gridview with an EntityDataSource, either code or set it in the design mode.

这是我的EntitydataSource：

this is my EntitydataSource:

<asp:EntityDataSource ID="EdsRolesByUser" runat="server" 
        ConnectionString="name=myDbEntities"
        DefaultContainerName="myDbEntities" EnableFlattening="False"
        EntitySetName="Roles" EntityTypeFilter="Role"
        Select="it.[RoleId], it.[RoleName]">
    </asp:EntityDataSource>

任何帮助，将不胜感激，谢谢。

Any help would be appreciated, thanks.

推荐答案

终于得到了它。
不得不修改EntityDataSource去除EntitySetName和EntityTypeFilter
属性，并添加在CommandText是这样的：

Finally got it. Have to modified the EntityDataSource removing the EntitySetName and EntityTypeFilter attributes, and add the CommandText like this:

CommandText="SELECT DISTINCT userRole.RoleId, role.RoleName FROM Role AS role
INNER JOIN User_Role as userRole
ON role.RoleId = userRole.RoleId
WHERE userRole.UserId = @UserIdPassbyUrl"

这链接帮助我：
的 http://msdn.microsoft.com/en-us/library/aa697427（v = VS.80）的.aspx

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