在网格视图数据绑定后使用条件更改列值

Question

我正在使用 join 在 Gridview 中显示来自三个表的数据。但是我想使用条件更改字段。

我将"状态"保留为"1"和"0"。对于"1"，我想显示"已选择"，对于"0"，我想显示"已拒绝"。

下面是我的代码：

void databind()
{
    string CS = ConfigurationManager.ConnectionStrings["myConnectionString"].ConnectionString;
    using (SqlConnection con = new SqlConnection(CS))
    {
        con.Open();
        SqlCommand cmd = new SqlCommand("select a.applicant_id as 'Applicant ID',a.applicant_name as 'Name',a.status as 'Status',b.staff_Name as 'Reviewed by',c.course_name as 'Course' from tblApplicant a left outer join tblStaff b on a.staff_id=b.staff_id left outer join tblCourse c on a.course_id=c.course_id", con);
        SqlDataReader dr = cmd.ExecuteReader();
        GridView1.DataSource = dr;
        GridView1.DataBind();
    }
}

Answer 1

将此

行与case when子句一起使用

 SqlCommand cmd = new SqlCommand("select a.applicant_id as 'Applicant ID',a.applicant_name as 'Name',case when a.status=0 then 'Rejected' else 'Selected' end as 'Status',b.staff_Name as 'Reviewed by',c.course_name as 'Course' from tblApplicant a left outer join tblStaff b on a.staff_id=b.staff_id left outer join tblCourse c on a.course_id=c.course_id", con);