Question

FileUpload img = (FileUpload)UploadImg;
        Byte[] imgByte = null;
        if (img.HasFile && img.PostedFile!=null)
        {
            HttpPostedFile File = UploadImg.PostedFile;
            imgByte = new Byte[File.ContentLength];
            File.InputStream.Read(imgByte, 0, File.ContentLength);
        }    **strong text**

here i want to save an image in database . so i want to convert an image to byte array. for that i wrote the above code. but here the if condition is not executed

Answer 1

Assuming you have a file upload control on your page:

<asp:FileUpload id="UploadImg" runat="server" />
<asp:Button id="UploadButton" runat="server" Text="Upload" OnClick="UploadButton_Click" />

the following should work:

protected void UploadButton_Click(object sender, EventArgs e)
{
    if(UploadImg.HasFile)
    {
        byte[] imgByte = UploadImg.FileBytes;
        string filename = Path.GetFileName(UploadImg.FileName);
        // TODO: Save the image to the database
    }
}