Question

在这个程序中，我得到以下错误：

GridView1 的DataSourceID必须是IDataSource类型的控件的ID。找不到ID为SqlDataSource1的控件。

Imports MySql.Data.MySqlClient
Imports System.Data

Partial Class _Default
    Inherits System.Web.UI.Page



    Dim con As MySqlConnection = New MySqlConnection("data source=localhost;database=dbconnect;user id=root;password=search;")

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub

    Protected Sub btn_display_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btn_display.Click
        Dim connection As MySqlConnection = New MySqlConnection("data source=localhost;database=dbconnect;user id=root;password=search;")
        Dim mydataset As New DataSet()
        Dim mydataadpter As MySqlDataAdapter = New MySqlDataAdapter()


        Dim mysql As MySqlCommand = New MySqlCommand("select * from userinfo", connection)
        connection.Open()


        mydataadpter.SelectCommand = mysql
        mydataadpter.Fill(mydataset, "product")
        Try
            'GridView1.DataSource = mydataset
            GridView1.DataBind()

            GridView1.DataMember = "product"

            connection.Close()
        Catch ex As Exception

            MsgBox(ex.Message)

        End Try



    End Sub
End Class

Answer 1

问题是DataSourceID属性被设计为在ASPX页面中使用，并且您在代码中。您想要使用DataSource属性。它在您的ASPX页面中查找名为“SqlDataSource1”的控件，但没有一个。如果在ASPX页面而不是代码中创建此SqlDataSource1对象，则可以将DataSourceID设置为SqlDataSource1对象的ID

DataSourceID="SqlDataSource1"

Answer 2

从源视图（.aspx）中的GridView1控件中删除DataSourceID属性及其值（DataSourceID="SqlDataSource1"）。

如何避免错误找不到ID为“SqlDataSource1”的控件

2 个答案: