Converting from Image to Base64 returns Error

Question

I am trying to convert an image into a base64 String so i can save in a column in my database. Now i see this method

public string ImageToBase64(Image image,System.Drawing.Imaging.ImageFormat format)
{
    using (MemoryStream ms = new MemoryStream())
    {
        // Convert Image to byte[]
        image.Save(ms, format);
        byte[] imageBytes = ms.ToArray();

        // Convert byte[] to Base64 String
        string base64String = Convert.ToBase64String(imageBytes);
        return base64String;
    }
}

And it gives me an Error in ASP.NET saying it does not contain the definition for Save , asks if i am missing an Assembly reference. And when i call it in the main method like this

string base64ImageString = ImageToBase64(img, System.Drawing.Imaging.ImageFormat.Jpeg);

of which the main code looks like this now :

        sigObj.SetImageFileFormat(0);
        sigObj.SetImageXSize(500);
        sigObj.SetImageYSize(150);
        sigObj.SetImagePenWidth(8);
        sigObj.SetJustifyX(5);
        sigObj.SetJustifyY(5);
        sigObj.SetJustifyMode(5);
        System.Drawing.Image img = sigObj.GetSigImage();
        base64ImageString = ImageToBase64(img, System.Drawing.Imaging.ImageFormat.Jpeg);

It gives me another funny error there which looks like this

Cannot convert from System.Drawing.Image to System.Web.UI.Web.Controls.Image

Please what exactly am I doing wrong. I am doing this on ASP.NET webform

Answer 1

The declaration of your method is getting clashed with System.Drawing.Image and System.Web.UI.Controls. Use it like

public string ImageToBase64(System.Drawing.Image image,System.Drawing.Imaging.ImageFormat format)