C# 显示DataGrid列WPF C中DB表中的行数#

我一直在旋转轮子，试图使用COUNT将数据库中有多少行显示到名为“jobsont”的数据网格列中

sqlCon.Open();
            string query = "SELECT UserName, COUNT(UserName) as count FROM tblJobs WHERE JobStatus != 'Booked' Group by UserName";
            SqlCommand cmd = new SqlCommand(query, sqlCon);

            using (SqlDataAdapter adapter = new SqlDataAdapter(cmd))
            {
                DataTable dt = new DataTable();

                adapter.Fill(dt);
                tblJobsBooked.ItemsSource = dt.DefaultView;
            }
            sqlCon.Close();

数据网格列

<DataGrid.Columns>
  <DataGridTextColumn Header="User" Binding="{Binding UserName}"/>
  <DataGridTextColumn Header="Jobs Booked" Binding="{Binding JobsCount}" />
</DataGrid.Columns>

计数应按用户名计算。

更改：

string query = "SELECT UserName, COUNT(UserName) as count FROM tblJobs WHERE JobStatus != 'Booked' Group by UserName";

为此：

string query = "SELECT UserName, COUNT(UserName) as JobsCount FROM tblJobs WHERE JobStatus != 'Booked' Group by UserName";

看到区别了吗？除非名称完全匹配，否则DataGrid无法绑定。

更改：

string query = "SELECT UserName, COUNT(UserName) as count FROM tblJobs WHERE JobStatus != 'Booked' Group by UserName";

为此：

string query = "SELECT UserName, COUNT(UserName) as JobsCount FROM tblJobs WHERE JobStatus != 'Booked' Group by UserName";

---

看到区别了吗？除非名称完全匹配，否则DataGrid无法绑定。

DataGridTextColumn中的数据绑定绑定到JobsCount，而SQL语句中的列是countFace palm，完全忽略了它DataGridTextColumn中的数据绑定绑定到JobsCount，而SQL语句中的列是countFace palm，完全忽略了它