如何使用asp.net（vb.net）將文本框中的數據保存到mysql數據庫

Question

我想將數據從textbox1和textbox2保存到數據庫，但出現此錯誤，並且錯誤未提及發生錯誤的那一行。 這是錯誤：

你調用的對象是空的。

 Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    If TextBox1.Text = "" And TextBox2.Text = "" Then Exit Sub

    Try
        conn = New MySqlConnection
        conn.ConnectionString = connstr
        conn.Open()

        strsql = "INSERT INTO supplier "
        strsql += "(SupplierName,SupplierID) VALUES "
        strsql += "(@Name, @ID);"

        cmd.Connection = conn
        cmd.CommandText = strsql
        cmd.Parameters.AddWithValue("@Name", TextBox1.Text)
        cmd.Parameters.AddWithValue("@ID", TextBox2.Text)
        cmd.ExecuteNonQuery()
        cmd.Parameters.Clear()
        cmd.Dispose()

        conn.Close()
    Catch ex As Exception
        Response.Write(ex.Message)
    End Try
End Sub

Answer 1

要獲取錯誤行，只需（臨時）刪除try / catch塊