Below code is used to check the image size in asp.net programmatically. This we need when we are try too upload a file which should have the configurable size.
Many Asp.net application which upload the file in server should have limitation in terms of size and this code will check the size of the file in terms of Height and width.
Lets see the code in C#
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing.Imaging;
using System.Drawing;
public partial class imgsize : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btn_Click(object sender, EventArgs e)
{
if (flurl.HasFile) {
string fname = flurl.PostedFile.FileName;
System.Drawing.Image img1 = default(System.Drawing.Image);
img1 = System.Drawing.Image.FromFile(fname);
int width = Convert.ToInt32(img1.Width);
int height = Convert.ToInt32(img1.Height);
if (width <= 170 && height <= 100) {
lblerror.Text = "Image size is allowed";
}
else {
lblerror.Text = "Image size is not allowed";
}
}
}
}
And in VB.Neth the code example
Imports System
Imports System.Data
Imports System.Configuration
Imports System.Collections
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls
Imports System.Drawing.Imaging
Imports System.Drawing
Public Partial Class imgsize
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
End Sub
Protected Sub btn_Click(ByVal sender As Object, ByVal e As EventArgs)
If flurl.HasFile Then
Dim fname As String = flurl.PostedFile.FileName
Dim img1 As System.Drawing.Image
img1 = System.Drawing.Image.FromFile(fname)
Dim width As Integer = Convert.ToInt32(img1.Width)
Dim height As Integer = Convert.ToInt32(img1.Height)
If width <= 170 AndAlso height <= 100 Then
lblerror.Text = "Image size is allowed"
Else
lblerror.Text = "Image size is not allowed"
End If
End If
End Sub
End Class