mysql - 访问 mysql 数据库并将其显示在 gridview 或表中

Question

我正在尝试访问 Mysql DB 并将其显示在 .Net 的 Gridview 中 我可以让它连接到数据库，但它什么也不显示，并且数据库中有记录，这是我正在使用的代码。

Dim MysqlConn As MySqlConnection
Dim ContactsCommand As New MySqlCommand
Dim ContactsAdapter As New MySqlDataAdapter
Dim ContactsData As New DataTable
Dim SQL As String

Private Sub btnGrabData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGrabData.Click

    MysqlConn = New MySqlConnection()
    SQL = "SELECT AffID FROM toutcome"

    MysqlConn.ConnectionString = "Server=localhost;Database=merrywoodtest;UID=MerryWoodTest;PWD=H0r$hamTest;"

    Try

        MysqlConn.Open()

        ContactsCommand.Connection = MysqlConn
        ContactsCommand.CommandText = SQL

        ContactsAdapter.SelectCommand = ContactsCommand
        ContactsAdapter.Fill(ContactsData)

        DataGridView1.DataSource = ContactsData

    Catch myerror As MySqlException

        MessageBox.Show("Cannot connect to database: " & myerror.Message)

    Finally

        MysqlConn.Close()

    End Try
End Sub

Answer 1

请确保在分配数据源后调用DataGridView的DataBind()方法。

您还可以设置 ContactsCommand 对象的 Connection 属性和 ContactsAdapter 对象的 SelectCommand 属性.