Question

I am sending a text México D.F. from javascript to C# but i am getting M??xico D.F..
My C# code is below.

public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
{
     System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
     string PostbackData = enc.GetString(context.Request.BinaryRead(context.Request.TotalBytes));
}

PostbackData contains México D.F. text as M??xico D.F..
How can i resolve it. Please help me.

Answer 1

You shouldn’t use ASCII, as there is no such symbol é there, so use Encoding.UTF8 instead:

using System.Text;

public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
{
     //System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding();
     string postbackData = Encoding.UTF8.GetString(context.Request.BinaryRead(context.Request.TotalBytes));
}

Edit, as John Skeet mentioned: You can use Encoding from your request rather than try to guess it – sometimes even UTF-8 is not enough, so better approach is:

using System.Text;

public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
{
     //System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding();
     string postbackData = context.Request.ContentEncoding.GetString(context.Request.BinaryRead(context.Request.TotalBytes));
}