Miscellaneous

The .aspx pages are the only ones that support the Src attribute, and therefore it's the only file type that supports JIT compilation of separate source files.By using the Src attribute in the page directive, you can specify which file the ASP.NET engine should compile. It cannot be used with a WebService. This means that you must precompile the code behind class that is to be used as the basis for the Web Service, either manually using the Command-line compiler or by building a Visual Studio.NET Web Service Application. 4.51 How to display random images on a web page from a set of images in a directory?



VB.NET (Add reference to Microsoft Visual Basic .NET Runtime)

Dim dirInfo As New System.IO.DirectoryInfo("c:\inetpub\wwwroot\syncfusion\images") 'This is your path to the bmp's Dim fileInfo() As IO.FileInfo Dim strRandomImage As String Dim i As Integer Dim rnd As Random fileInfo = dirInfo.GetFiles("*") 'Gets an array of file info rnd = New Random Randomize() i = CInt(rnd.NextDouble * UBound(fileInfo)) ' gets a random index strRandomImage = "images/" + fileInfo(i).Name ' Returns the random string TD1.Attributes.Add("background", strRandomImage)

C#

System.IO.DirectoryInfo dirInfo =new System.IO.DirectoryInfo(@"c:\inetpub\wwwroot\SyncnewCsharp\images") ;//This is your path to the bmp's System.IO.FileInfo[] fileInfo ; string strRandomImage; int i ; Random rnd ; fileInfo = dirInfo.GetFiles("*"); //Gets an array of file info rnd = new Random(); Microsoft.VisualBasic.VBMath.Randomize (); i = Convert.ToInt32 (rnd.NextDouble() * fileInfo.GetUpperBound(0));// gets a random index strRandomImage = "Images/" + fileInfo[i].Name ;// Returns the random string TD1.Attributes.Add ("background", strRandomImage);

4.52 How can I scan a string to determine if it contains DBCS chars?