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...

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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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MySQL VB.NET Tutorial 14 : Search data in database and Filter in datagri...

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 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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MySQL VB.NET Tutorial 5 : How To Open A Second Form using First Form + s...

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

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MySQL VB.NET Tutorial 4 : Password Protection using Textbox

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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

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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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MySQL VB.NET Tutorial 1 : Getting Started and Mysql database Connection

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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Visual Basic .NET Tutorial 40 - How to use DateTimePicker Control and Fo...

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Visual Basic .NET Tutorial 39 - How to make a Random Number Generator wi...

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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