17: Advanced Forms Ser vice s in Visual Studio .NET

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17: Advanced Forms Ser vice s
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Figure 1724: Diagnostic Logging administration page
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ULS sends its tracing data directly to text les under the %CommonProgramFiles%\Microsoft Of ce Servers\Web Server Extensions\12\LOGS directory You can change this logs directory by setting the Path value under the Trace Log settings shown in Figure 1724 On occasion (and under speci c conditions that are beyond the scope of this text), ULS creates a new log Furthermore, it removes old logs after some time If you are trying to nd tracing data from a speci c time frame, it helps to sort by and look at the last modi ed dates and times of the log les Once you nd the log le of interest, try opening it in your favorite text editor If you choose a large log le (say, 1MB or larger), just be prepared to wait several minutes for it to open!
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Too Much Verbosity Can Hurt
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Use caution when increasing the verbosity of trace logs Having more categories that trace with higher verbosity generates larger log les more quickly Higher verbosities degrade server performance, so it s best to use this technique modestly for investigating problems
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Once you have the log data in front of you, you ll notice that it s very extensive There are nine columns of data with all sorts of details underneath You can look at the time stamps, product, category, and severity for each log entry It might drive an average person insane, but it is possible to work through! To better sort, lter, and get the data you need, it s easiest to import the data into a spreadsheet program such as Excel This is particularly important considering that there isn t a guarantee by ULS that the order of rows descends by date and time In fact, it s quite easy to assume they re in order This slight mistake can cost you dearly, especially when performing root cause analysis that depends on the chronological ordering of log entries While it s nice to know that you can dig deeply into verbose server logs to narrow down problems, it s de nitely not something you ll be using (or want to use) very often Your rst defense to prevent issues will be preventive maintenance Try lling out your server s forms occasionally to ensure that things such as data connections and form code still work as they were designed Plus, it s wise to monitor the Windows event log for errors and warnings If the errors or warnings in the Windows logs don t give you enough information to resolve the problem, the next step is to increase the verbosity of the event log or move to the trace logs
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When invoking a form in the browser, Forms Services is con gured to recognize only URLs that come from the site In other words, a form may be properly invoked only by using the SharePoint site URL Even though it may appear to work, using localhost from the server itself is not supported If you re familiar with SharePoint, you may already know that access paths other than the site URL are not automatically supported
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17: Advanced Forms Ser vice s
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Similar to SharePoint, any alternate access mapping (AAM) URLs must be declared via the Central Administration site So, if you wanted to be able to access your server via an IP address instead of http://myServer, for example, it would need to be registered with SharePoint
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If you receive an error while trying to access a browser form using an alternate URL, you likely need to add that URL to the SharePoint alternate access mappings de nition
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To register an alternate URL with SharePoint that is recognized by Forms Services, start by visiting the Central Administration site s Operations tab Then click on the Alternate access mappings link under the Global Con guration section You can de ne three different types of AAMs: incoming, outgoing, and external URL mappings The most common reason to use an AAM is for Network Address Translation (NAT) or port forwarding, for example This type of AAM requires alternate incoming and outgoing URLs that map the WFE servers to a translated address on the outside and vice versa You can nd more information on AAM on Of ce Online (as referenced in the Appendix)
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Filling Out a Form on a SharePoint Page So far, we ve been lling out browser-enabled form templates in the FormServeraspx page This is the default rendering page used by Forms Services every time a form is lled out in the browser While we re limited to displaying a form by using this page (for now), we re not constrained by where we can show a form Thanks to SharePoint s Page Viewer Web Part, it s possible to ll out a form within the context of any customizable SharePoint page The Page Viewer Web Part simply lets you choose a URL for the control to navigate to By carefully choosing a URL to the FormServeraspx page, you can ll out a form within this Web part! To add the Page Viewer Web Part to your SharePoint page, you rst need to have a design role If you have the appropriate permission, you ll
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