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Pooja Malohtra
Pooja Malohtra

Total Post:47

Posted on    December-11-2014 12:30 AM

 ASP.Net C# 

 2 Reply(s)
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I got a code of convert text into image using C#. The code is given below. Now my quetion is that this function return a bitmap image. How to show it in my asp.net page. I want show the image which is returned by this function.


private Bitmap CreateBitmapImage(string sImageText)


    Bitmap objBmpImage = new Bitmap(1, 1);


    int intWidth = 0;

    int intHeight = 0;


    // Create the Font object for the image text drawing.

    Font objFont = new Font("Arial", 20, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Pixel);


    // Create a graphics object to measure the text's width and height.

    Graphics objGraphics = Graphics.FromImage(objBmpImage);


    // This is where the bitmap size is determined.

    intWidth = (int)objGraphics.MeasureString(sImageText, objFont).Width;

    intHeight = (int)objGraphics.MeasureString(sImageText, objFont).Height;


    // Create the bmpImage again with the correct size for the text and font.

    objBmpImage = new Bitmap(objBmpImage, new Size(intWidth, intHeight));


    // Add the colors to the new bitmap.

    objGraphics = Graphics.FromImage(objBmpImage);


    // Set Background color


    objGraphics.SmoothingMode = SmoothingMode.AntiAlias;

    objGraphics.TextRenderingHint = TextRenderingHint.AntiAlias;

    objGraphics.DrawString(sImageText, objFont, new SolidBrush(Color.FromArgb(102, 102, 102)), 0, 0);


    return (objBmpImage);


Tom Cruser
Tom Cruser

Total Post:28

Posted on    December-11-2014 6:33 AM

reate httphandler (like image.ashx) and use something like this code:


    public void ProcessRequest(HttpContext context)


        context.Response.ContentType = "image/png";

        var image = CreateBitmapImage("Hello world");

        var ms = new MemoryStream();

        image.Save(ms, ImageFormat.Png);




And where you need to have your image add the link < img src="image.ashx" alt="image" />


Updated [based on comments]:




    public void ProcessRequest(HttpContext context)


        context.Response.ContentType = "image/png";


        var text = context.Request.Params["text"];

        if (text == null) text = string.Empty;

        var image = CreateBitmapImage(text);


        image.Save(context.Response.OutputStream, ImageFormat.Png);


page layout:


    <asp:TextBox runat="server" ID="MyTextBox"></asp:TextBox>

    <asp:Button runat="server" OnClick="RenderImageButtonClicked" Text="Change text"/>

    <asp:Image runat="server" ID="MyTextImage" />

page event:


    protected void RenderImageButtonClicked(object sender, EventArgs e)


        MyTextImage.ImageUrl = "CreateImageText.ashx?text=" + HttpContext.Current.Server.UrlEncode(MyTextBox.Text);


Barbara Jones

Total Post:13

Posted on    December-11-2014 7:03 AM

there is an example of this with the following function


public Bitmap ConvertTextToImage(string txt, string fontname, int fontsize, Color bgcolor, Color fcolor, int width, int Height)


        Bitmap bmp = new Bitmap(width, Height);

        using (Graphics graphics = Graphics.FromImage(bmp))



            Font font = new Font(fontname, fontsize);

            graphics.FillRectangle(new SolidBrush(bgcolor), 0, 0, bmp.Width, bmp.Height);

            graphics.DrawString(txt, font, new SolidBrush(fcolor), 0, 0);







        return bmp;


and to use this function:


ConvertTextToImage(txtvalue.Text, "Bookman Old Style", 10, Color.Yellow, Color.Red, txtvalue.Width, txtvalue.Height);

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