[英]Is there a way I can get value from second row first column value in Mysql to a text box in vb.net?
我一直在努力解開這個謎團。 我的知識有限。 所以我就卡在這里了。 我需要從第二行第一列數據(需要指定行和列並獲取值)中獲取值到文本框。 即使這感覺很容易,請給出答案。 對不起,如果是。
Dim conn As SqlConnection
Dim sql As String = "UPDATE attendance.dateverification SET Count1 = CASE WHEN Today_Date <> current_date THEN Count1 + 1 ELSE Count1 END,
Count2 = CASE WHEN Today_Date = current_date THEN Count2 + 1 ELSE Count2 END,
Today_Date = current_date,
Subject_selected =@subject WHERE Subject_Name = @subject; SELECT Subject_Name, Today_Date, Count1, Count2 FROM dateverification"
Try
conn = New MySqlConnection(ConnectionString)
Dim cmd As New MySqlCommand(sql, conn)
cmd.Parameters.Add("@subject", MySqlDbType.VarString, 50).Value = TextBox3.Text
conn.Open()
Dim rdr As MySqlDataReader = cmd.ExecuteReader()
rdr.Read()
TextBox2.Text = rdr("Subject_Name").ToString()
Label1.Text = rdr("Today_Date").ToString()
Label2.Text = rdr("Count1").ToString()
Label3.Text = rdr("Count2").ToString()
Catch ex As Exception
MessageBox.Show(ex.Message)
再次調用rdr.Read()
以前進到下一條記錄。
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