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

Extracting Values from PDFs in .NET Core 8 without ASP.NET

Extracting data from PDF files is a common necessity for various tasks such as data analysis, content indexing, and information retrieval. While ASP.NET Core 8 offers robust tools for PDF manipulation, there are instances where developers may prefer alternatives for flexibility or specific project requirements. In this article, we'll explore how to extract values from PDF files within the .NET Core 8 ecosystem without relying on ASP.NET, using the PdfSharpCore library. We'll provide a step-by-step guide along with examples in C# to demonstrate how to accomplish this task effectively. Understanding PdfSharpCore: PdfSharpCore is a popular .NET library for PDF document manipulation. It provides functionalities to create, modify, and extract content from PDF files. In this guide, we'll focus on utilizing PdfSharpCore to extract text from PDF documents. Installing PdfSharpCore: Before we can start using PdfSharpCore in our .NET Core application, we need to install the PdfSharpCo...
Post a Comment
Read more