Monday, March 31, 2014

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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Sunday, March 30, 2014

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




































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

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Thursday, March 27, 2014

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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Sunday, March 23, 2014

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










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

Code for searching data from database using Visual Basic

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Saturday, March 22, 2014

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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Thursday, March 20, 2014

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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Monday, March 17, 2014

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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Sunday, March 16, 2014

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























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

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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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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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Tuesday, March 11, 2014

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










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

Using The WebBrowser Control As A Document Viewer

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Creating A Web Browser In VB.Net - VB.NET Tutorials


Saturday, March 8, 2014

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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