Ado Connection Error Handling Asp
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Forums Links DISCUSSIONARCHIVES DISCUSSIONARCHIVES2 DISCUSSIONARCHIVES3 BLOG We didn't realize the site was so popular. Other Stuff How To Use On Error Resume Next Often when using asp on error ASP or Active Server Pages with VBScript you will find it necessary to check for
Asp On Error Goto
errors when you do certain things that may fail and then handle it accordingly. Things like opening a database connection or writing
Adodb.connection Errors
to a text file come to mind. Generally if an error is encountered in your .asp file, the processing of your script stops and an error message is returned to the browser. If you want to
Ado Error 2147467259
continue processing your page even if an error is encountered, include the following line at the beginning of your .asp file: <% On Error Resume Next %> That being said just ignoring errors in your code is not a very good idea. What you really want to do is handle the error in some way. The example below opens a database connection and shows you how to trap a potential error and do adodb error codes whatever you want because of it. In this case we are simply displaying the error. <% ConnectionString = "DBQ=c:\inetpub\wwwroot\mysite\data\mydatabase.mdb;Driver={Microsoft Access Driver (*.mdb)};" '*** This code checks the ConnectionString info you entered and reports back the error code if it is not ok Err.Clear On Error Resume Next Set ConnPasswords = Server.CreateObject("ADODB.Connection") ConnPasswords.Open ConnectionString If Err.Number <> 0 Then Response.Write (Err.Description& "
") Response.Write("This means there is most likely a problem with the" & vbCrLf) Response.Write("""ConnectionString"" info that you specified.
" & vbCrLf) Response.End End If On Error GoTo 0 %> We put the "On Error GoTo 0 at the end because that will essentially end the "on error resume next" That is something you want to do so any later errors in your application do not get ignored without you knowing about it. Below is another example. In this example our application logs user info in a text file when they sign in to a site. We add "On Error Resume Next" here simply so no nasty error message come up if by chance write permissions to the text file do not exist. <% Set ObjMyFile = CreateObject("Scripting.FileSystemObject") Err.Clear On Error Resume Next LogFileName = "aspprotect.log" LogFileDirectory = "c:\somedirectory" 'Open Text File.. If doesn't exist create it and append t
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resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs https://msdn.microsoft.com/en-us/library/ms677489(v=vs.85).aspx Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. ADO Programmer's Guide ActiveX Data Objects (ADO) Error Handling Error Handling ADO Errors ADO Errors ADO Errors ADO Errors ADO Error Reference Provider Errors Field-Related Error Information Recordset-Related Error on error Information Handling Errors In Other Languages Anticipating Errors TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. ADO Errors ADO errors are reported to your program as run-time errors. You can use the error-trapping mechanism of your asp on error programming language to trap and handle them. For example, in Visual Basic, use the On Error statement. In Visual J++, use a try-catch block. In Visual C++, it depends on the method you are using to access the ADO libraries. With #import, use a try-catch block. Otherwise, C++ programmers need to explicitly retrieve the error object by calling GetErrorInfo. The following Visual Basic sub procedure demonstrates trapping an ADO error: Copy ' BeginErrorHandlingVB01 Private Sub Form_Load() ' Turn on error handling On Error GoTo FormLoadError 'Open the database and the recordset for processing. ' Dim strCnn As String strCnn = "Provider=sqloledb;" & _ "Data Source=a-iresmi2000;" & _ "Initial Catalog=Northwind;Integrated Security=SSPI" ' cnn is a Public Connection Object because ' it was defined WithEvents Set cnn = New ADODB.Connection cnn.Open strCnn ' The next line of code intentionally causes ' an error by trying to open a connection ' that has already been opened. cnn.Open strCnn ' rst is a Public Recordset because it ' was defined Wi