Skip to main content

How to convert Html page to a Image using WebBrowser in Asp.net


Thumbnail Image:
public class Thumbnail
{
    public string Url { get; set; }
    public Bitmap ThumbnailImage { get; set; }
    public int Width { get; set; }
    public int Height { get; set; }
    public int BrowserWidth { get; set; }
    public int BrowserHeight { get; set; }

    public Thumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
    {
        this.Url = Url;
        this.BrowserWidth = BrowserWidth;
        this.BrowserHeight = BrowserHeight;
        this.Height = ThumbnailHeight;
        this.Width = ThumbnailWidth;
    }
    public Bitmap GenerateThumbnail()
    {
        Thread thread = new Thread(new ThreadStart(GenerateThumbnailInteral));
        thread.SetApartmentState(ApartmentState.STA);
        thread.Start();
        thread.Join();
        return ThumbnailImage;
    }
    private void GenerateThumbnailInteral()
    {
        WebBrowser webBrowser = new WebBrowser();
        webBrowser.ScrollBarsEnabled = false;
        webBrowser.Navigate(this.Url);
        webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
        while (webBrowser.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents();
        webBrowser.Dispose();
    }
    private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {
        WebBrowser webBrowser = (WebBrowser)sender;
        webBrowser.ClientSize = new Size(this.BrowserWidth, this.BrowserHeight);
        webBrowser.ScrollBarsEnabled = false;
        this.ThumbnailImage = new Bitmap(webBrowser.Bounds.Width, webBrowser.Bounds.Height);
        webBrowser.BringToFront();
        webBrowser.DrawToBitmap(ThumbnailImage, webBrowser.Bounds);
        this.ThumbnailImage = (Bitmap)ThumbnailImage.GetThumbnailImage(Width, Height, null, IntPtr.Zero);
    }
}
Test Page:
<%@ Page Language="C#" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <script runat="server">
        protected void CreateThumbnailImage(object sender, EventArgs e)
        {
            string url = string.Format("http://{0}", txtWebsiteAddress.Text);
            int width = Int32.Parse(txtWidth.Text);
            int height = Int32.Parse(txtHeight.Text);
            Thumbnail thumbnail = new Thumbnail(url, 800, 600, width, height);
            Bitmap image = thumbnail.GenerateThumbnail();
            image.Save(Server.MapPath("~") + "/Thumbnail.bmp");
            imgThumbnailImage.ImageUrl = "~/Thumbnail.bmp";
            imgThumbnailImage.Visible = true;
        }    
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="txtWebsiteAddress" runat="server" Text="www.google.com" />
        <asp:Button ID="btnCreateThumbnailImage" runat="server" Text="Create Thumbnail Image" OnClick="CreateThumbnailImage" /></td>
        <asp:TextBox ID="txtWidth" runat="server" Text="200" />
        <asp:TextBox ID="txtHeight" runat="server" Text="200" />
        <asp:Image ID="imgThumbnailImage" runat="server" Visible="false" />
    </div>
    </form>
</body>
</html>
Labels:

Comments

Post a Comment

Popular posts from this blog

How to write Unit Tests in .net

Unit tests are automated tests that verify the behavior code like methods and functions. Writing unit tests is crucial to clean coding, as they help ensure your code works as intended and catches bugs early in the development process. I can share some tips for writing effective unit tests: Write tests for all public methods Every public method in your code should have a corresponding unit test. This helps ensure that your code behaves correctly and catches any unexpected behavior early. public class Calculator { public int Add(int a, int b) { return a + b; } } [TestClass] public class CalculatorTests { [TestMethod] public void Add_ShouldReturnCorrectSum() { // Arrange Calculator calculator = new Calculator(); int a = 1; int b = 2; // Act int result = calculator.Add(a, b); // Assert Assert.AreEqual(3, result); } } Test boundary conditions  Make sure to test boundary conditions, such a...
Post a Comment
Read more

What to choose between .NET Core and .NET?

 .NET Framework is a better choice if you: you don't have enough time time to learn new technology. Need a stable environment to work in. Have nearer release schedules. you are already working on an existing app and extending its functionality. If already have an existing team with .NET expertise and building production-ready software. Do not want to deal with continuous upgrades and changes. Building Windows client applications using Windows Forms or WPF .NET Core is a better choice if you: IF you wanted to deploy your app on Windows, Linux, and Mac operating systems. Are not afraid of learning new things. Are not afraid of breaking and fixing things since .NET Core is not fully matured yet. When you are learning .NET. work on open source.
Post a Comment
Read more