ASP.NET Create Thumbnail Image |
ASP.NET Create Thumbnail Image ตัวอย่างนี้ผมได้เขียน ASP.NET ในการ Resize Thumbnail ทั้งโฟเดอร์
Language Code :  VB.NET || C#
Framework : 1,2,3,4
AspNetCreateThumbnail.aspx
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Imaging" %>
<%@ Import Namespace="System.IO"%>
<script runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
If Not Page.IsPostBack() Then
Me.txtFrom.Text = "Gallery/"
Me.txtTo.Text = "Resize/"
End IF
End Sub
Sub btnCreate_OnClick(sender As Object, e As EventArgs)
Dim myDirInfo As DirectoryInfo
Dim arrFileInfo As Array
Dim myFileInfo As FileInfo
Dim FileName As String
Dim NewFileName As String
Me.lblText.Text = ""
myDirInfo = New DirectoryInfo(Server.MapPath(Me.txtFrom.Text))
arrFileInfo = myDirInfo.GetFiles("*.jpg")
For Each myFileInfo In arrFileInfo
FileName = txtFrom.Text & myFileInfo.Name
NewFileName = txtTo.Text & "Thumbnail_"&myFileInfo.Name
'*** Call to function resize ***'
Call ResizeImages(FileName,NewFileName)
Me.lblText.Text = Me.lblText.Text & (FileName & "===> <a href=" & NewFileName & ">" & NewFileName &"</a><br>")
Next myFileInfo
End Sub
Sub ResizeImages(FileName,NewFileName)
Dim intWidth,intHeight As Integer
intWidth = 100 '*** Fix Width ***'
intHeight = 0 '*** If = 0 Auto Re-Cal Size ***'
Dim objGraphic As System.Drawing.Image = System.Drawing.Image.FromFile(Server.MapPath(FileName))
Dim objBitmap As Bitmap
'*** Calculate Height ***'
If intHeight > 0 Then
objBitmap = New Bitmap(objGraphic, intWidth, intHeight)
Else
If objGraphic.Width > intWidth Then
Dim ratio As Double = objGraphic.Height / objGraphic.Width
intHeight = ratio * intWidth
objBitmap = New Bitmap(objGraphic, intWidth, intHeight)
Else
objBitmap = New Bitmap(objGraphic)
End If
End If
'*** Save As ***'
objBitmap.Save(Server.MapPath(NewFileName), objGraphic.RawFormat)
'*** Close ***'
objGraphic.Dispose()
'*** Nothing ***'
objBitmap = Nothing
objGraphic = Nothing
End Sub
</script>
<html>
<head>
<title>ThaiCreate.Com ASP.NET - Images (System.Drawing)</title>
</head>
<body>
<form id="form1" runat="server">
<asp:Label id="lblForm" runat="server" Text="Path From" Width="58px"></asp:Label>
<asp:Textbox id="txtFrom" runat="server"></asp:Textbox><br />
<asp:Label id="lblTo" runat="server" Text="Path To" Width="58px"></asp:Label>
<asp:Textbox id="txtTo" runat="server"></asp:Textbox>
<input id="btnCreate" type="button" OnServerClick="btnCreate_OnClick" value="Create" runat="server" />
<hr />
<asp:Label id="lblText" runat="server"></asp:Label>
</form>
</body>
</html>
</form>
Screenshot
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Load balance : Server 02
