c# - 将 SqlDataSource 转换为 DataTable 和 DataView

Question

我有以下 SqlDataSource，我想将它转换为 DataView 并从中读取一列:

SELECT     
    dbo.Divisions.DivisionShortcut, 
    COUNT(DISTINCT dbo.UserQuiz.Username) AS [Number of Participants]
FROM         
    dbo.Divisions 
INNER JOIN
    dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode 
INNER JOIN
    dbo.UserQuiz ON dbo.employee.Username = dbo.UserQuiz.Username 
INNER JOIN
    dbo.Quiz ON dbo.UserQuiz.QuizID = dbo.Quiz.QuizID
WHERE     
    (dbo.Quiz.QuizID = @QuizID)
GROUP BY 
    dbo.Divisions.DivisionShortcut

此 SqlDataSource 让用户输入测验的编号，然后它将检索该测验的参与者总数。我想将此 SqlDataSource 转换为 DataTable 并从中读取一列。

那么怎么做呢？

Answer 1

假设您有一个名为 SqlDataSource1 的 SqlDataSource

DataSourceSelectArguments args = new DataSourceSelectArguments();
DataView view = (DataView)SqlDataSource1.Select(args);
DataTable dt = view.ToTable();

现在您可以轻松地从此 dt(DataTable) 中读取列，例如

int columnNumber = 0;
for(int i=0;i<dt.Rows.Count;i++)
{
    MessageBox.Show(dt.Rows[i][columnNumber].ToString());
}

Reference