make a table open up on form load

Hi guys,


I have a form1 that checks the log in username with the password. That works fine.

Now the username Items are in a dropdownlist and represent tables. Now I need to open on form 2 that particular table that has been selected in form1.

(DropDownList1.SelectedItem.Value ) is the name of the table to be called .

Eg if the item selected on the dropdownlist was Table1 and that was validated with the password then on Form2 , Table2 will open up in a DataGrid.

Can someone give me some help cos its my first ADO.NEt project . Thanks loads

Hi
A little sample code , you need to modify your connection string and sql query. Add a sqlconnection, a SqlDataAdapter1 and and datagrid on a form

Code:

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Private Sub form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
dim contring as string = "data source=YourServer;initial catalog=YourDataBase;persist security info=False;user id=YourUser;password=YourUserPassaword;workstation id=" & System.Environment.MachineName & ";packet size=32767;application name=YourAppName"
dim ds as new dataset
        Me.SqlConnection1.ConnectionString = constring
        Me.SqlConnection1.Open()
        Me.SqlDataAdapter1.SelectCommand.Connection = Me.SqlConnection1
        Me.SqlDataAdapter1.SelectCommand.CommandType = CommandType.Text
        Me.SqlDataAdapter1.SelectCommand.CommandText = "select * from YourTable order by YourField1 desc"
        Me.SqlDataAdapter1.Fill(ds, "YourTable")

        Me.DataGrid1.DataSource = ds.Tables("YourTable")
        Me.DataGrid1.ReadOnly = True
        Me.SqlConnection1.close
end sub

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Regards
Jorge

hi Asgorath,


Will try it out, and come back if I m stuck cos I dont have much experience as yet. Thanks loads for your help!

Hi Asogarth & Guys,

Can you check out some syntax mistakes pls cos I dont fully understood what I should do. I tried to insert my fields and table but its a mess I guess. Anyways I have loads to errors dealing with not declared. Can u help me out pls :)

Code:

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Protected WithEvents Label2 As System.Web.UI.WebControls.Label
    Protected WithEvents Button3 As System.Web.UI.WebControls.Button
    Protected WithEvents Button2 As System.Web.UI.WebControls.Button
    Protected WithEvents Button1 As System.Web.UI.WebControls.Button
    Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
    Protected WithEvents OleDbConnection1 As System.Data.OleDb.OleDbConnection
    Protected WithEvents OleDbSelectCommand1 As System.Data.OleDb.OleDbCommand
    Protected WithEvents OleDbInsertCommand1 As System.Data.OleDb.OleDbCommand
    Protected WithEvents OleDbUpdateCommand1 As System.Data.OleDb.OleDbCommand
    Protected WithEvents OleDbDeleteCommand1 As System.Data.OleDb.OleDbCommand
    Protected WithEvents OleDbDataAdapter1 As System.Data.OleDb.OleDbDataAdapter
    Dim MyConnection As String = "provider=Microsoft.Jet.OLEDB.4.0;data source= C:\Inetpub\wwwroot\timerbutton\TechnicalSupport.mdb"
#Region " Web Form Designer Generated Code "

    'This call is required by the Web Form Designer.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.OleDbConnection1 = New System.Data.OleDb.OleDbConnection
        Me.OleDbSelectCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbInsertCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbUpdateCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbDeleteCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbDataAdapter1 = New System.Data.OleDb.OleDbDataAdapter
        '
        'OleDbDataAdapter1
        '
        Me.OleDbDataAdapter1.DeleteCommand = Me.OleDbDeleteCommand1
        Me.OleDbDataAdapter1.InsertCommand = Me.OleDbInsertCommand1
        Me.OleDbDataAdapter1.SelectCommand = Me.OleDbSelectCommand1
        Me.OleDbDataAdapter1.UpdateCommand = Me.OleDbUpdateCommand1

    End Sub
    Protected WithEvents lblMessage As System.Web.UI.WebControls.Label
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label

    'NOTE: The following placeholder declaration is required by the Web Form Designer.
    'Do not delete or move it.
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: This method call is required by the Web Form Designer
        'Do not modify it using the code editor.
        InitializeComponent()
    End Sub

#End Region

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
        Dim Connection1 As New OleDbConnection

        Dim SqlDataAdapter1 As New OleDbDataAdapter1
        Dim ds As New DataSet
        Dim str As String = Request.QueryString("dropdownlist1")
        Me.Connection1.ConnectionString = MyConnection

        Me.Connection1.Open()
        Me.SqlDataAdapter1.SelectCommand.Connection = Me.Connection1
        Me.SqlDataAdapter1.SelectCommand.CommandType = CommandType.Text
        Me.SqlDataAdapter1.SelectCommand.CommandText = "select * from School1 order by UserName WHERE UserName = '" & str

        Me.DataGrid1.DataSource = ds.Tables("str")
        Me.DataGrid1.ReadOnly = True
        Me.MylConnection.close()

        'DropDownList1.DataSource = dsSchool1.Tables("Security").DefaultView
        'DropDownList1.DataTextField = "username"
        'DropDownList1.DataValueField = "id"

        Label1.Text = str

   
End Class

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