form1.vb

crystal report dataset

Imports System.io
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.ComponentModel.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 Button1 As System.Windows.Forms.Button
    Friend WithEvents CrystalReportViewer1 As CrystalDecisions.Windows.Forms.CrystalReportViewer
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button
        Me.CrystalReportViewer1 = New CrystalDecisions.Windows.Forms.CrystalReportViewer
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(32, 8)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "Button1"
        '
        'CrystalReportViewer1
        '
        Me.CrystalReportViewer1.ActiveViewIndex = -1
        Me.CrystalReportViewer1.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                    Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.CrystalReportViewer1.Location = New System.Drawing.Point(8, 40)
        Me.CrystalReportViewer1.Name = "CrystalReportViewer1"
        Me.CrystalReportViewer1.ReportSource = Nothing
        Me.CrystalReportViewer1.Size = New System.Drawing.Size(680, 480)
        Me.CrystalReportViewer1.TabIndex = 1
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(704, 533)
        Me.Controls.Add(Me.CrystalReportViewer1)
        Me.Controls.Add(Me.Button1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            ' here i have define a simple datatable inwhich image will recide
            Dim dt As New DataTable
            ' object of data row
            Dim drow As DataRow
            ' add the column in table to store the image of Byte array type
            dt.Columns.Add("Image", System.Type.GetType("System.Byte[]"))
            drow = dt.NewRow
            ' define the filestream object to read the image
            Dim fs As FileStream
            ' define te binary reader to read the bytes of image
            Dim br As BinaryReader
            ' check the existance of image
            If File.Exists(AppDomain.CurrentDomain.BaseDirectory & "10157.Jpg") Then
                ' open image in file stream
                fs = New FileStream(AppDomain.CurrentDomain.BaseDirectory & "10157.Jpg", FileMode.Open)
            Else ' if phot does not exist show the nophoto.jpg file
                fs = New FileStream(AppDomain.CurrentDomain.BaseDirectory & "NoPhoto.jpg", FileMode.Open)
            End If
            ' initialise the binary reader from file streamobject
            br = New BinaryReader(fs)
            ' define the byte array of filelength
            Dim imgbyte(fs.Length) As Byte
            ' read the bytes from the binary reader
            imgbyte = br.ReadBytes(Convert.ToInt32((fs.Length)))
            drow(0) = imgbyte       ' add the image in bytearray
            dt.Rows.Add(drow)       ' add row into the datatable
            br.Close()              ' close the binary reader
            fs.Close()              ' close the file stream
            Dim rptobj As New CrystalReport1    ' object of crystal report
            rptobj.SetDataSource(dt)            ' set the datasource of crystalreport object
            CrystalReportViewer1.ReportSource = rptobj  'set the report source
        Catch ex As Exception
            ' error handling
            MsgBox("Missing 10157.jpg or nophoto.jpg in application folder")
        End Try
        ''' run the application to view image in report
    End Sub
End Class