Visual Basic .NET Tutorial 45 - How To Use DataGridView (Remove rows)

Private Sub REMOVE_ROW_Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        If DataGridView1.SelectedRows.Count > 0 Then
            For i As Integer = DataGridView1.SelectedRows.Count - 1 To 0 Step -1
                DataGridView1.Rows.RemoveAt(DataGridView1.SelectedRows(i).Index)

            Next
        Else
            MessageBox.Show("No rows to select")
        End If

    End Sub

--------------------------------------------

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Visual Basic .NET Tutorial 44 - How To Use DataGridView (Adding rows)

-----------------------------------------

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MySQL VB.NET Tutorial 19 : How to use DateTimePicker and save date in D...

MySQL VB.NET Tutorial 16 : How to Link Chart /Graph with Database

Private Sub LOAD_CHART_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LOAD_CHART.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"
        Dim READER As MySqlDataReader
        Try
            MysqlConn.Open()
            Dim Query As String
            Query = "select *  from database.edata"
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader
            While READER.Read
                Chart1.Series("NAME_VS_AGE").Points.AddXY(READER.GetString("name"), READER.GetInt32("age"))

            End While
            MysqlConn.Close()
        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()
        End Try
    End Sub

---------------------------------------

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Private Sub Search_txt_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Search_txt.TextChanged

        Dim DV As New DataView(dbDataSet)
        DV.RowFilter = String.Format("name Like '%{0}%'", Search_txt.Text)
        DataGridView1.DataSource = DV

    End Sub

--------------------------------------------------

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MySQL VB.NET Tutorial 9 : How to Link Combobox with Database values

Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"
        Dim READER As MySqlDataReader
        Try
            MysqlConn.Open()
            Dim Query As String
            Query = "select *  from database.edata"
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader
            While READER.Read
                Dim sName = READER.GetString("name")
                ComboBox1.Items.Add(sName)

            End While
            MysqlConn.Close()
        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()
        End Try

    End Sub

--------------------------------------------------------

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MySQL VB.NET Tutorial 8 : Deleting selected data from database

Private Sub Button_Delete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"
        Dim READER As MySqlDataReader


        Try
            MysqlConn.Open()
            Dim Query As String
            Query ="Delete from database.edata where eid='" & TextBox_Eid.text &"'"
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader

            MessageBox.Show("Data Deleted")
            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try
    End Sub

----------------------------------------------------

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MySQL VB.NET Tutorial 8 : Deleting selected data from database

Private Sub Button_Delete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"
        Dim READER As MySqlDataReader


        Try
            MysqlConn.Open()
            Dim Query As String
            Query ="Delete from database.edata where eid='" & TextBox_Eid.text &"'"
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader

            MessageBox.Show("Data Deleted")
            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try
    End Sub

----------------------------------------------------

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MySQL VB.NET Tutorial 6 : Insert/Save data to database

Imports MySql.Data.MySqlClient
Public Class Form2
    Dim MysqlConn As MySqlConnection
    Dim COMMAND As MySqlCommand
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Form1.Show()
        Me.Hide()

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"
        Dim READER As MySqlDataReader


        Try
            MysqlConn.Open()
            Dim Query As String
            Query = "insert into database.edata (eid,name,surname,age) values ('" & TextBox_Eid.Text & "','" & TextBox_Name.Text & "','" & TextBox_SName.Text & "','" & TextBox_Age.Text & "')"
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader

            MessageBox.Show("Data Saved")
            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try
    End Sub
End Class

------------------------------------------------------------------

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-------------------------------------------------

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---------------------------------------------------

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MySQL VB.NET Tutorial 3 : Create Login Form with MySql and VB.NET (Part 2)

Imports MySql.Data.MySqlClient

Public Class Form1
    Dim MysqlConn As MySqlConnection
    Dim COMMAND As MySqlCommand




    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"

        Try
            MysqlConn.Open()
            MessageBox.Show("Connection Successful")
            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try

    End Sub

    Private Sub Login_Btn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Login_Btn.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"
        Dim READER As MySqlDataReader


        Try
            MysqlConn.Open()
            Dim Query As String
            Query = "select * from database.edata where user_name='" & TextBox_UN.Text & "' and password='" & TextBox_Pass.Text & "' "
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader
            Dim count As Integer
            count = 0
            While READER.Read
                count = count + 1

            End While

            If count = 1 Then
                MessageBox.Show("Username and password are correct")
            ElseIf count > 1 Then
                MessageBox.Show("Username and password are Duplicate")
            Else
                MessageBox.Show("Username and password are not correct")

            End If


            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try
    End Sub
End Class

MySQL VB.NET Tutorial 2 : Create Login Form with MySql and VB.NET (Part 1)

Imports MySql.Data.MySqlClient

Public Class Form1
    Dim MysqlConn As MySqlConnection
    Dim COMMAND As MySqlCommand




    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"

        Try
            MysqlConn.Open()
            MessageBox.Show("Connection Successful")
            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try

    End Sub

    Private Sub Login_Btn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Login_Btn.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"
        Dim READER As MySqlDataReader


        Try
            MysqlConn.Open()
            Dim Query As String
            Query = "select * from database.edata where user_name='" & TextBox_UN.Text & "' and password='" & TextBox_Pass.Text & "' "
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader
            Dim count As Integer
            count = 0
            While READER.Read
                count = count + 1

            End While

            If count = 1 Then
                MessageBox.Show("Username and password are correct")
            ElseIf count > 1 Then
                MessageBox.Show("Username and password are Duplicate")
            Else
                MessageBox.Show("Username and password are not correct")

            End If


            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try
    End Sub
End Class

--------------------------------------------------------

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Imports MySql.Data.MySqlClient

Public Class Form1
    Dim MysqlConn As MySqlConnection

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString =
       "server=localhost;userid=root;password=root;database=database"

        Try
            MysqlConn.Open()
            MessageBox.Show("Connection Successful")
            MysqlConn.Close()

        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        Finally
            MysqlConn.Dispose()

        End Try

    End Sub
End Class

-----------------------------------------------------------------

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Visual Basic .NET Tutorial 41 - How to use the WebBrowser control in Vis...

Public Class Form1

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        WebBrowser1.Navigate(TextBox1.Text)

    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        WebBrowser1.GoForward()

    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        WebBrowser1.GoBack()

    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        WebBrowser1.Refresh()

    End Sub

    Private Sub WebBrowser1_Navigated(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserNavigatedEventArgs) Handles WebBrowser1.Navigated
        TextBox1.Text = WebBrowser1.Url.ToString()


    End Sub
End Class

-----------------------------------------------

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-------------------------------------------

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Public Class Form1


    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim rn As New Random
        MessageBox.Show(rn.Next(1000, 10000))

    End Sub
End Class

--------------------------------

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