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  #1  
Old 19-02-2009
Member
 
Join Date: Aug 2008
Posts: 40
How can I bind textbox with column in SQL database?

Hi,

I want a little help to bind a textbox of my form to the field in my SQL database!

I am working with VB.NET frameworks! Any example would be helpful!
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  #2  
Old 19-02-2009
Member
 
Join Date: Apr 2008
Posts: 1,948
Re: How can I bind textbox with column in SQL database?

Is this your first project in VB.NET using data from a database?

Try this code:

At the very top of the class (above the Public Class statement, put the
following:
Imports System.Data.Odbc

Now in your subroutine, put:

Dim cn as odbcConnection = new odbcconnection(provider & path to the
database)
Dim sql as string = SELECT * FROM tablename"
Dim cmd as odbcCommand = New odbcCommand(sql,cn)
Dim da as odbcDataAdapter = New odbcDataAdapter
da.SelectCommand = cmd
dim ds as New DataSet
da.Fill(ds)

control.DataBindings.Add("Text", ds, "tablename.fieldname")

Now this will automatically set the text of each control to the value in the
database. All you then have to do is code in some kind of record
navigation.

Hope this helps,
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  #3  
Old 19-02-2009
Member
 
Join Date: Apr 2008
Posts: 2,001
Re: How can I bind textbox with column in SQL database?

You need to learn databinding concepts!

http://www.exforsys.com/tutorials/vb...a-binding.html

Hope this helps!
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  #4  
Old 19-02-2009
Member
 
Join Date: May 2008
Posts: 2,008
Re: How can I bind textbox with column in SQL database?

Try this:
Code:
Imports System
Imports System.Data
Imports System.Data.OleDb
Imports System.Data.SqlClient
Imports System.Collections
Imports System.Windows.Forms
Imports System.Resources

Public Class MainClass
    Shared Sub Main()
        Dim form1 As Form = New Form1()
        Application.Run(form1)

    End Sub
End Class



Public Class Form1
    'Form level variables
    Private strConnectionString As String = _
        "Provider=Microsoft.Jet.OLEDB.4.0;" & _
        "Data Source=Employee.mdb;"

    Private objConnection As OleDbConnection
    Private objCommand As OleDbCommand
    Private objDataAdapter As OleDbDataAdapter
    Private objDataTable As DataTable

    Private objDataReader As OleDbDataReader
    Private blnIsLoading As Boolean = True

    Private Sub Form1_Load(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles Me.Load

        'Initialize the Connection object
        objConnection = New OleDbConnection(strConnectionString)

        'Initialize the Command object
        objCommand = New OleDbCommand("SELECT ID, FirstName " & _
            "FROM Employee", objConnection)

        'Initialize the DataAdapter object and set the SelectCommand property
        objDataAdapter = New OleDbDataAdapter
        objDataAdapter.SelectCommand = objCommand

        'Initialize the DataTable object
        objDataTable = New DataTable

        'Populate the DataTable
        objDataAdapter.Fill(objDataTable)

        'Bind the DataTable to the ComboBox
        ComboBox1.DataSource = objDataTable
        ComboBox1.DisplayMember = "FirstName"
        ComboBox1.ValueMember = "ID"

        'Turn off the loading flag
        blnIsLoading = False

        'Clean up
        objDataAdapter.Dispose()
        objDataAdapter = Nothing
        objCommand.Dispose()
        objCommand = Nothing
        objConnection.Dispose()
        objConnection = Nothing
    End Sub

    Private Sub ComboBox1_SelectedValueChanged(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles ComboBox1.SelectedValueChanged

        'Exit if the combo box is being loaded
        If blnIsLoading Then
            Exit Sub
        End If

        'Initialize the Connection object and open it
        objConnection = New OleDbConnection(strConnectionString)
        objConnection.Open()

        'Initialize the Command object
        objCommand = New OleDbCommand

        'Set the objCommand object properties
        objCommand.CommandText = "StoreProcedureForEmployee"
        objCommand.CommandType = CommandType.StoredProcedure
        objCommand.Connection = objConnection

        'Add the required parameter for the query
'        objCommand.Parameters.Add("@ID", OleDbType.Guid, 16).Value = _
 '           New Guid(ComboBox1.SelectedValue.ToString)
        objCommand.Parameters.Add("@ID", OleDbType.TinyInt, 8).Value = CInt(ComboBox1.SelectedValue.ToString)

        'Execute the Query
        objDataReader = objCommand.ExecuteReader()

        'If we have data then display the project description
        If objDataReader.HasRows Then
            objDataReader.Read()
            TextBox1.Text = objDataReader.Item("LastName")
        End If

        'Close the DataReader and Connection
        objDataReader.Close()
        objConnection.Close()

        'Clean up
        objDataReader = Nothing
        objCommand.Dispose()
        objCommand = Nothing
        objConnection.Dispose()
        objConnection = Nothing
    End Sub
End Class



<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'ComboBox1
        '
        Me.ComboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList
        Me.ComboBox1.FormattingEnabled = True
        Me.ComboBox1.Location = New System.Drawing.Point(76, 13)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(205, 21)
        Me.ComboBox1.TabIndex = 3
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(13, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(41, 13)
        Me.Label1.TabIndex = 2
        Me.Label1.Text = "Projects"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(76, 44)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(204, 20)
        Me.TextBox1.TabIndex = 5
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(13, 47)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(56, 13)
        Me.Label2.TabIndex = 4
        Me.Label2.Text = "Last Name"
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(292, 76)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.ComboBox1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label

End Class
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