SQL 用户类型问题

Question

我使用SQL query 来定义表中用户的角色。例如：-

1 -- 超级管理员

2 -- 管理员

3 -- 用户

在gridview中，我想将文本显示为Super Admin，Admins，但我仍然得到0，1和2。

请帮忙

代码：-

SELECT (
        CASE WHEN usertype =1 THEN 'Admin' 
              WHEN usertype=0 THEN 'Super Admin' 
              WHEN usertype=2 THEN 'User' END ) aS usertype 
FROM tbl_User

Gridview aspx 代码：-

<asp:GridView ID="grdUser" AllowPaging="true" AutoGenerateColumns="False"
            OnDataBound="grdUser_DataBound" OnRowDeleting="grdUser_RowDeleting"
            OnPreRender="PreRenderGrid" runat="server" Width="100%"
            border="1" DataKeyNames="Id" PageSize="2"
            OnPageIndexChanging="grdUser_PageIndexChanging"
            EnableSortingAndPagingCallbacks="false"
            CssClass="pagi" OnRowCommand="grdUser_RowCommand">
            <Columns>
                <asp:BoundField DataField="username" HeaderText="UserName" 
                         ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td">
                    <HeaderStyle CssClass="k-grid td"></HeaderStyle>
                    <ItemStyle Width="30px"></ItemStyle>
                </asp:BoundField>
                <asp:BoundField DataField="usertype" HeaderText="UserType" 
                           ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td">
                    <HeaderStyle CssClass="k-grid td"></HeaderStyle>
                    <ItemStyle Width="30px"></ItemStyle>
                </asp:BoundField>                    
            </Columns>
 </asp:GridView>

Answer 1

在 Grid 事件 RowDatabound 下，您必须处理此问题，否则您的 SQL 查询将返回 RoleDescription 以及 roleID，然后将其绑定到 Grid 上

对于 RowDataBound 事件：-

protected void ctrlGrid_ItemDataBound(object sender, GridItemEventArgs e)
  {
     //add three case like this
    if (dataBoundItem["usertype"].Text == "1")
     Label lblUserType = (dataBoundItem["UserType"].FindControl("lblUserType") as Label);
     lblUserType.Text = "Admin";

 }

编辑：-

根据您的sql查询，我必须说更改您的别名并添加单引号

SELECT Id,username,email,usertype,active, 
CASE WHEN usertype ='1' THEN 'Admin' 
WHEN usertype='0' THEN 'Super Admin' 
WHEN usertype='2' THEN 'User' END ) AS usertypeDescription 
from tbl_User ORDER By Id DESC

然后改变

 <asp:BoundField DataField="usertypeDescription" HeaderText="UserType" 
                       ItemStyle-Width="30" HeaderStyle-CssClass="k-grid td">
    <HeaderStyle CssClass="k-grid td"></HeaderStyle>
       <ItemStyle Width="30px"></ItemStyle>
 </asp:BoundField>