ASP.NET FAQ - GDI+

Here is an article from ftp online: Modify Image Data

Here is an article from ftp online: Automate Text Graphics Creation

Here is an article from ftp online: Chart a Course With ASP.NET Graphics

Try giving the proper file path for the image. Also make sure you have proper permissions on that file.

VB.NET

...
Dim sFormat As New StringFormat()
sFormat.Alignment = StringAlignment.Far
...
g.DrawString('Syncfusion', New Font('Arial', 16, FontStyle.Italic), SystemBrushes.WindowText, New PointF(2, 2), sFormat)
......

C#

...
StringFormat sFormat = new StringFormat() ;
sFormat.Alignment = StringAlignment.Far;
...
g.DrawString('Syncfusion', new Font('Arial', 16, FontStyle.Italic), SystemBrushes.WindowText, new PointF(2, 2), sFormat) ;
......

...
dim sFormat As New StringFormat()  
sFormat.FormatFlags = StringFormatFlags.DirectionVertical  
...
g.DrawString('Syncfusion', new Font('Arial',16,FontStyle.Italic or FontStyle.Bold ),SystemBrushes.WindowText, new PointF(2,2) , sFormat )  

...
StringFormat sFormat = new StringFormat()  ;
sFormat.FormatFlags = StringFormatFlags.DirectionVertical  ;
...
g.DrawString('Syncfusion', new Font('Arial',16,FontStyle.Italic|FontStyle.Bold ),SystemBrushes.WindowText, new PointF(2,2) ,sFormat)  ;
...

VB.NET

if (Img.RawFormat.Equals(System.Drawing.Imaging.ImageFormat.Jpeg)) then
     	Response.ContentType = 'image/jpeg'
Else 
..
End if

C#

if (Img.RawFormat.Equals(System.Drawing.Imaging.ImageFormat.Jpeg)) 
{
    	Response.ContentType = 'image/jpeg'
}
else 
{
..
}

Use WebClient to request it and save it to disk, open the local copy.

Try
VB.NET

Label1.BackColor = System.Drawing.Color.FromName('Green')

C#

Label1.BackColor = System.Drawing.Color.FromName('Green');

Try

VB.NET

objGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias

C#

objGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;

VB.NET

Dim img As System.Drawing.Image
Dim strFilename As String = Server.MapPath('curves1.jpg')
img = System.Drawing.Image.FromFile(strFilename)
Dim b = New System.Drawing.Bitmap(img.Width, img.Height, PixelFormat.Format24bppRgb)
Dim g As Graphics = Graphics.FromImage(b)
img.RotateFlip(System.Drawing.RotateFlipType.Rotate270FlipXY)
g.DrawImage(img, New Point(0, 0))
Response.ContentType = 'image/jpeg'
b.Save(Response.OutputStream, ImageFormat.Jpeg)

C#

System.Drawing.Image img ;   
string strFilename = Server.MapPath('curves1.jpg')  ;
img = System.Drawing.Image.FromFile(strFilename) ; 
Bitmap b = new System.Drawing.Bitmap(img.Width, img.Height, PixelFormat.Format24bppRgb)  ;
Graphics  g    = Graphics.FromImage(b)  ;
img.RotateFlip(System.Drawing.RotateFlipType.Rotate270FlipXY)  ;
g.DrawImage(img,new Point(0,0))  ;
Response.ContentType='image/jpeg'  ;
b.Save(Response.OutputStream, ImageFormat.Jpeg)  ;

VB.NET

Dim objBitmap As New Bitmap(500, 500)
Dim objGraphics As Graphics = Graphics.FromImage(objBitmap)
objGraphics.Clear(Color.White)
objGraphics.FillRectangle(New SolidBrush(Color.Purple), 0, 0, 400, 10)
objBitmap.Save(Response.OutputStream, ImageFormat.Jpeg)

C#

Bitmap objBitmap = new Bitmap(500, 500);
Graphics objGraphics = Graphics.FromImage(objBitmap); 
objGraphics.Clear(Color.White);
objGraphics.FillRectangle(new SolidBrush(Color.Purple  ), 0, 0, 400, 10);
objBitmap.Save(Response.OutputStream, ImageFormat.Jpeg);

VB.NET

 ’Function
Public Function showImage(empid As Int32) As Byte()
   Dim myconnection As New SqlConnection('Server=localhost;uid=sa;password=;database=northwind;')
   Dim mycommand As New SqlCommand('Select Employeeid, FirstName,Photo from Employees where employeeid =' + empid.ToString(), myconnection)
   myconnection.Open()
   Dim dr As SqlDataReader = mycommand.ExecuteReader()
   dr.Read()
   Dim imgbyte As Byte() = CType(dr('Photo'), Byte())
   Return imgbyte
End Function ’showImage 

’In Page_Load
Dim data As Byte() = showImage(2)
Dim offset As Int32 = 78
Dim mstream As New System.IO.MemoryStream()
mstream.Write(data,offset,data.Length -offset)
Dim bmp As New System.Drawing.Bitmap(mstream)
bmp.Save(Server.MapPath('sample.jpeg'), System.Drawing.Imaging.ImageFormat.Jpeg)
mstream.Close()
Image1.ImageUrl = Server.MapPath('sample.jpeg')

C#

//Function
public byte []  showImage(Int32 empid)  
{
	SqlConnection  myconnection  = new SqlConnection ('Server=localhost;uid=sa;password=;database=northwind;');
	SqlCommand mycommand = new SqlCommand ('Select Employeeid, FirstName,Photo from Employees where employeeid =' + empid, myconnection);
	myconnection.Open ();
	SqlDataReader  dr= mycommand.ExecuteReader();
	dr.Read();
	byte[]  imgbyte =(byte[]) dr['Photo']; 
	return imgbyte;
		
}
//In Page_Load
byte[] data  = showImage (2);
Int32  offset  =78;
System.IO.MemoryStream mstream = new System.IO.MemoryStream  ();
mstream.Write(data, offset, data.Length - offset);
System.Drawing.Bitmap bmp= new System.Drawing.Bitmap(mstream);
bmp.Save(Server.MapPath ('sample.jpeg'), System.Drawing.Imaging.ImageFormat.Jpeg );
mstream.Close();
Image1.ImageUrl = Server.MapPath('sample.jpeg');

VB.NET

dim fntFont as Font = new Font('Arial',16,FontStyle.Italic|FontStyle.Bold )

C#

Font fntFont =new Font('Arial',16,FontStyle.Italic|FontStyle.Bold ) ;

For more details refer FontStyle Enumeration

Give the proper path of the file. Check your permissions on the server where you are trying to write/read the files