display image in gridviewcomboboxcolumn

[Ameya]

Posted 4 hours ago (permalink)

Hello Friends,


I following field in sql database for  IMage_master 

1) Imageid (numeric(18,0))
2) Image_code (nvarchar(100))
3) fullimage (image) -- I store image with 100 kb

I am doing windows application with C# and Sql2008 as backend

I have gridviewcomboboxcolumn with name cmbimage with display member fullimage and value member as image code. Its not sowing image its just showing byte[]. i want to display image in   gridviewcomboboxcolumn  .


Please help me out , if possible with code

With Regards

Ameya Chavan

[Stefan]

Hello Ameya,

Thank you for writing.

Please refer to the following helper methods, which you can use to convert a byte[] to an image:

private Image GetImageFromData(byte[] imageData)
{
    const int OleHeaderLength = 78;
    MemoryStream memoryStream = new MemoryStream();
    if (HasOleContainerHeader(imageData))
    {
        memoryStream.Write(imageData, OleHeaderLength, imageData.Length - OleHeaderLength);
    }
    else
    {
        memoryStream.Write(imageData, 0, imageData.Length);
    }
    Bitmap bitmap = new Bitmap(memoryStream);
    return bitmap.GetThumbnailImage(55, 65, null, new IntPtr());
}

private bool HasOleContainerHeader(byte[] imageByteArray)
{
    const byte OleByte0 = 21;
    const byte OleByte1 = 28;
    return (imageByteArray[0] == OleByte0) && (imageByteArray[1] == OleByte1);
}

I hope you find this information useful.

Regards,
Stefan
the Telerik team