Search records using textbox in VB.NET

In this article we will search records from database using textbox and show respective data in the datagridview in three different ways.

1.Enter the know data in the textbox and click the search button to display respective data from the datagridview.

2.Enter the first letter of the unknown data in the textbox and all data relating data to that letter will be shown in the datagridview, so that we can able to search our own data.

3.Enter the know data in the textbox and find its all related data in the datagridview

Imports System.Data

Imports System.Data.OleDb

Public Class Form1

    Dim ConnectionString As String = System.Configuration.ConfigurationSettings.AppSettings("dsn")

    Dim con As OleDbConnection = New OleDbConnection(ConnectionString)

    Dim com As OleDbCommand

    Dim oledbda As OleDbDataAdapter

    Dim ds As DataSet

    Dim dt As DataTable

    Dim str As String

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)Handles Button1.Click

        If TextBox1.Text = "" Then

            ErrorProvider1.SetError(TextBox1, "please provide name")

        Else

            Try

                con.Open()

                str = "select * from student where sname ='" & TextBox1.Text & "'"

                com = New OleDbCommand(str, con)

                oledbda = New OleDbDataAdapter(com)

                ds = New DataSet

                oledbda.Fill(ds, "student")

                con.Close()

                DataGridView1.DataSource = ds

                DataGridView1.DataMember = "student"

            Catch ex As Exception

                MsgBox(ex.Message)

            End Try

        End If

        TextBox1.Clear()

        DataGridView1.Visible = True

    End Sub

    Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) 

Handles TextBox2.TextChanged

       If TextBox2.Text = "" And TextBox2.Text.Length = 0 Then

             DataGridView1.Visible = False
        Else
            Try

               con.Open()

                str = "select * from student where sname like '" & TextBox2.Text & "%'"

                com = New OleDbCommand(str, con)

                oledbda = New OleDbDataAdapter(com)

                ds = New DataSet

                oledbda.Fill(ds, "student")

                con.Close()

                DataGridView1.DataSource = ds

                DataGridView1.DataMember = "student"

                DataGridView1.Visible = True

            Catch ex As Exception

                MsgBox(ex.Message)

            End Try

        End If

    End Sub

    Private Sub TextBox3_TextChanged(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) 

Handles TextBox3.TextChanged

        Try

            con.Open()

            str = "select * from student where sname ='" & TextBox3.Text & "'"

            com = New OleDbCommand(str, con)

            oledbda = New OleDbDataAdapter(com)

            ds = New DataSet

            oledbda.Fill(ds, "student")

            con.Close()

            DataGridView1.DataSource = ds

            DataGridView1.DataMember = "student"

            DataGridView1.Visible = True

        Catch ex As Exception

            MsgBox(ex.Message)

        End Try

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesMyBase.Load

        DataGridView1.Visible = False

    End Sub

 End Class

Output