VB.Net/Database ADO.net/Database Utility
GUI based SQL command executer
<source lang="vbnet"> Imports System Imports System.Data Imports System.Windows.Forms Imports System.Data.SqlClient public class MainClass
Shared Sub Main() Dim form1 As Form = New Form1 Application.Run(form1) End Sub
End Class
Public Class Form1
Inherits System.Windows.Forms.Form
- Region " Windows Form Designer generated code "
Public Sub New() MyBase.New() "This call is required by the Windows Form Designer. InitializeComponent() "Add any initialization after the InitializeComponent() call End Sub "Form overrides dispose to clean up the component list. Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.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. Friend WithEvents Label1 As System.Windows.Forms.Label Friend WithEvents Label2 As System.Windows.Forms.Label Friend WithEvents SqlConnection1 As System.Data.SqlClient.SqlConnection Friend WithEvents SqlStatement As System.Windows.Forms.TextBox Friend WithEvents ResultBox As System.Windows.Forms.TextBox Friend WithEvents ExecuteButton As System.Windows.Forms.Button <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.SqlStatement = New System.Windows.Forms.TextBox Me.ExecuteButton = New System.Windows.Forms.Button Me.ResultBox = New System.Windows.Forms.TextBox Me.Label1 = New System.Windows.Forms.Label Me.Label2 = New System.Windows.Forms.Label Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection Me.SuspendLayout() " "SqlStatement " Me.SqlStatement.Location = New System.Drawing.Point(16, 32) Me.SqlStatement.Multiline = True Me.SqlStatement.Name = "SqlStatement" Me.SqlStatement.Size = New System.Drawing.Size(464, 96) Me.SqlStatement.TabIndex = 0 Me.SqlStatement.Text = "" " "ExecuteButton " Me.ExecuteButton.Location = New System.Drawing.Point(211, 136) Me.ExecuteButton.Name = "ExecuteButton" Me.ExecuteButton.TabIndex = 1 Me.ExecuteButton.Text = "Go" " "ResultBox " Me.ResultBox.Location = New System.Drawing.Point(16, 200) Me.ResultBox.Multiline = True Me.ResultBox.Name = "ResultBox" Me.ResultBox.Size = New System.Drawing.Size(464, 104) Me.ResultBox.TabIndex = 2 Me.ResultBox.Text = "" " "Label1 " Me.Label1.Location = New System.Drawing.Point(104, 8) Me.Label1.Name = "Label1" Me.Label1.Size = New System.Drawing.Size(288, 23) Me.Label1.TabIndex = 3 Me.Label1.Text = "Type a SQL Statement below and press Go to execute it" " "Label2 " Me.Label2.Location = New System.Drawing.Point(136, 176) Me.Label2.Name = "Label2" Me.Label2.Size = New System.Drawing.Size(224, 23) Me.Label2.TabIndex = 4 Me.Label2.Text = "The results of your command are as follows" " "SqlConnection1 " Me.SqlConnection1.ConnectionString = "server=(local)\SQLEXPRESS;" & _ "integrated security=sspi;" & _ "database=MyDatabase" "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(496, 317) Me.Controls.Add(Me.Label2) Me.Controls.Add(Me.Label1) Me.Controls.Add(Me.ResultBox) Me.Controls.Add(Me.ExecuteButton) Me.Controls.Add(Me.SqlStatement) Me.Name = "Form1" Me.Text = "Form1" Me.ResumeLayout(False) End Sub
- End Region
Private Sub ExecuteButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ExecuteButton.Click " Get SQL Query from textbox Dim sql As String = SqlStatement.Text " Create Command object Dim NewCommand As New SqlCommand(sql, SqlConnection1) Try " Open Connection SqlConnection1.Open() " Execute Command NewCommand.ExecuteNonQuery() " Display Result Message ResultBox.Text = "SQL executed successfuly" Catch ex As Exception " Display error message ResultBox.Text = ex.ToString() Finally SqlConnection1.Close() End Try End Sub
End Class
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Query Processor: Execute SQL command and display result in Grid
<source lang="vbnet"> Imports System Imports System.Data Imports System.Windows.Forms Imports System.Data.SqlClient public class MainClass
Shared Sub Main() Dim form1 As Form = New Form1 Application.Run(form1) End Sub
End Class
Public Class Form1
Inherits System.Windows.Forms.Form
- Region " Windows Form Designer generated code "
Public Sub New() MyBase.New() "This call is required by the Windows Form Designer. InitializeComponent() "Add any initialization after the InitializeComponent() call End Sub "Form overrides dispose to clean up the component list. Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.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. Friend WithEvents Label1 As System.Windows.Forms.Label Friend WithEvents Label2 As System.Windows.Forms.Label Friend WithEvents SqlConnection1 As System.Data.SqlClient.SqlConnection Friend WithEvents ExecuteButton As System.Windows.Forms.Button Friend WithEvents SqlStatement As System.Windows.Forms.TextBox Friend WithEvents ResultBox As System.Windows.Forms.ListView <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.Label1 = New System.Windows.Forms.Label Me.Label2 = New System.Windows.Forms.Label Me.ExecuteButton = New System.Windows.Forms.Button Me.SqlStatement = New System.Windows.Forms.TextBox Me.ResultBox = New System.Windows.Forms.ListView Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection Me.SuspendLayout() " "Label1 " Me.Label1.Location = New System.Drawing.Point(112, 8) Me.Label1.Name = "Label1" Me.Label1.Size = New System.Drawing.Size(272, 23) Me.Label1.TabIndex = 0 Me.Label1.Text = "Type a SQL Query below and press Go to execute it" " "Label2 " Me.Label2.Location = New System.Drawing.Point(136, 192) Me.Label2.Name = "Label2" Me.Label2.Size = New System.Drawing.Size(224, 16) Me.Label2.TabIndex = 1 Me.Label2.Text = "The data matching your query is as follows" " "ExecuteButton " Me.ExecuteButton.Location = New System.Drawing.Point(200, 152) Me.ExecuteButton.Name = "ExecuteButton" Me.ExecuteButton.TabIndex = 2 Me.ExecuteButton.Text = "Go" " "SqlStatement " Me.SqlStatement.Location = New System.Drawing.Point(16, 32) Me.SqlStatement.Multiline = True Me.SqlStatement.Name = "SqlStatement" Me.SqlStatement.Size = New System.Drawing.Size(464, 104) Me.SqlStatement.TabIndex = 3 Me.SqlStatement.Text = "" " "ResultBox " Me.ResultBox.GridLines = True Me.ResultBox.Location = New System.Drawing.Point(16, 216) Me.ResultBox.Name = "ResultBox" Me.ResultBox.Size = New System.Drawing.Size(464, 152) Me.ResultBox.TabIndex = 4 Me.ResultBox.View = System.Windows.Forms.View.Details " "SqlConnection1 " Me.SqlConnection1.ConnectionString = "server=(local)\SQLEXPRESS;" & _ "integrated security=sspi;" & _ "database=MyDatabase" " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(496, 373) Me.Controls.Add(Me.ResultBox) Me.Controls.Add(Me.SqlStatement) Me.Controls.Add(Me.ExecuteButton) Me.Controls.Add(Me.Label2) Me.Controls.Add(Me.Label1) Me.Name = "Form1" Me.Text = "QueryProcessor" Me.ResumeLayout(False) End Sub
- End Region
Private Sub ExecuteButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ExecuteButton.Click " Clear list view column headers and items ResultBox.Columns.Clear() ResultBox.Items.Clear() " Get SQL Query from textbox Dim sql As String = SqlStatement.Text " Create Command object Dim NewQuery As New SqlCommand(sql, SqlConnection1) Try " Open Connection SqlConnection1.Open() " Execute Command and Get Data Dim NewReader As SqlDataReader = NewQuery.ExecuteReader() " Get column names for list view from data reader For i As Integer = 0 To NewReader.FieldCount - 1 Dim header As New ColumnHeader header.Text = NewReader.GetName(i) ResultBox.Columns.Add(header) Next " Get rows of data and show in list view While NewReader.Read() " Create list view item Dim NewItem As New ListViewItem " Specify text and subitems of list view NewItem.Text = NewReader.GetValue(0).ToString() For i As Integer = 1 To NewReader.FieldCount - 1 NewItem.SubItems.Add(NewReader.GetValue(i).ToString()) Next " Add item to list view items collection ResultBox.Items.Add(NewItem) End While " Close data reader NewReader.Close() Catch ex As SqlException " Create and error column header Dim ErrorHeader As New ColumnHeader ErrorHeader.Text = "SQL Error" ResultBox.Columns.Add(ErrorHeader) " Add Error List Item Dim ErrorItem As New ListViewItem(ex.Message) ResultBox.Items.Add(ErrorItem) Catch ex As Exception " Create and error column header Dim ErrorHeader As New ColumnHeader ErrorHeader.Text = "Error" ResultBox.Columns.Add(ErrorHeader) " Add Error List Item Dim ErrorItem As New ListViewItem("An error has occurred") ResultBox.Items.Add(ErrorItem) Finally SqlConnection1.Close() End Try End Sub
End Class
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