15: Writing Code in InfoPath in VS .NET

Printer QR Code ISO/IEC18004 in VS .NET 15: Writing Code in InfoPath
15: Writing Code in InfoPath
QR Code 2d Barcode Printer In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
code in Listing 1529 supports the Start_Over_Clicked method by exposing our FormState data wrapped in properties for consistent data access
Drawing Barcode In .NET
Using Barcode drawer for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Listing 1528: Implementation of the Start Over Button Click Event
Create Denso QR Bar Code In C#
Using Barcode drawer for VS .NET Control to generate, create QR-Code image in VS .NET applications.
public void Start_Over_Clicked(object sender, ClickedEventArgs e) { // Every button ID called "Start_Over" calls into this handler ViewInfosSwitchView("Welcome"); // Tell the user to remove his or her digital signature if (thisSigned) { MessageBoxShow("Cannot start over because the form " + "data is signed Please go to the Digital Signatures " + "dialog and remove your signature Then click this " + "button again to continue"); return; } // Clear the main data source XPathNavigator docElem = MainDataSourceCreateNavigator()SelectSingleNode("*"); docElemReplaceSelf(StartOverOuterXml); // Clear any secondary data sources XPathNavigator subAreasRoot = DataSources["GetSubAreas"]CreateNavigator(); XPathNavigator subDocElem = subAreasRootSelectSingleNode("*"); subDocElemReplaceSelf(StartOverGetSubAreas); }
QR Code ISO/IEC18004 Encoder In Visual Studio .NET
Using Barcode creation for .NET Control to generate, create QR Code image in .NET framework applications.
NOTE
Paint Quick Response Code In VB.NET
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code 2d barcode image in .NET applications.
Using FormState to Persist Session Data
Code39 Maker In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create Code 3/9 image in ASP.NET applications.
To recall an earlier discussion in this chapter, the FormState object holds name-value pairs of any serializable types Its purpose is to maintain state in form code from the time a speci c form is opened for lling until it is closed The Loading event is well suited for initializing FormState objects
EAN128 Maker In .NET Framework
Using Barcode generator for ASP.NET Control to generate, create EAN128 image in ASP.NET applications.
Listing 1529: Persisting the Default State of XML for Main and Secondary Data Sources
Drawing Bar Code In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create bar code image in ASP.NET applications.
const string _startOverOuterXml = "startOverOuterXml"; const string _startOverGetSubAreas = "startOverGetSubAreas"; /* */ private string StartOverOuterXml { get
Encode Barcode In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Programming InfoPath in Action!
Bar Code Creation In .NET
Using Barcode creation for ASP.NET Control to generate, create bar code image in ASP.NET applications.
{ if (FormStateContains(_startOverOuterXml)) return FormState[_startOverOuterXml] as string; throw new Exception( "Form load did not load properly before Starting Over!"); } } private string StartOverGetSubAreas { get { if (FormStateContains(_startOverGetSubAreas)) return FormState[_startOverGetSubAreas] as string; throw new Exception( "Form load did not load properly before Starting Over!"); } }
Paint GS1 - 13 In .NET
Using Barcode printer for ASP.NET Control to generate, create UPC - 13 image in ASP.NET applications.
Checking for Errors and Adding a Digital Signature Now that we ve seen how the form can start over, we should learn about the click here Button control As its surrounding text hints, clicking this Button will sign this part of the form and continue But that s not all Earlier we made it a requirement that before the user can sign and switch to the next view, there must be no pending form errors within the Welcome group That means all required or invalid elds with validation errors in the Welcome view must be xed To determine whether a form error exists on an item within the Welcome group, we use the XPathNavigator IsDescendent method As you ll see in the code, we ask the Welcome node whether a speci c node is a descendent; if so, we ve found a node of interest If errors are found, we show a dialog listing the exact errors with a corresponding corrective action Figure 1527 shows the dialog (which also
Postnet 3 Of 5 Generation In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create Postnet image in ASP.NET applications.
Figure 1527: Dialog for clearly presenting to the user any form errors
Make European Article Number 13 In Java
Using Barcode creator for Java Control to generate, create EAN-13 Supplement 5 image in Java applications.
15: Writing Code in InfoPath
Making ANSI/AIM Code 128 In C#
Using Barcode generation for .NET framework Control to generate, create USS Code 128 image in Visual Studio .NET applications.
appeared earlier as Figure 1519) Generating such a detailed dialog is very easy But ultimately, to make the dialog helpful for users, you must rely on eld names that closely resemble any text labels adjacent to the corresponding controls As you look at the code snippet shown in Listing 1530, you ll see that we rst check whether the form data is signed This will be true, by the way, if the form is partially or wholly signed If signing has already occurred, we don t need to check for form errors For signing to occur in the rst place, we must have already validated that there are no errors through this same code path! Since we re also sinking and special-casing the Signing event (as you ll soon see), there s no other way for the form to get signed
Data Matrix 2d Barcode Scanner In Visual Studio .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Listing 1530: Code for the Button That Starts Validation on the Default View of the MOI Consulting Request Form
Painting UPC A In Java
Using Barcode drawer for Java Control to generate, create UPC-A image in Java applications.
public void click_here_to_sign_Clicked( object sender, ClickedEventArgs e) { if (thisSigned) { ViewInfosSwitchView("RequestDetails"); return; } // 1 Check for errors XPathNavigator root = MainDataSourceCreateNavigator(); XPathNavigator welcome = rootSelectSingleNode( "/my:Request/my:Welcome", NamespaceManager); string welcomeErrors = stringEmpty; foreach (FormError error in Errors) { // Is this error under the "Welcome" group if (welcomeIsDescendant(errorSite)) welcomeErrors += errorSiteLocalName + ": " + errorMessage + SystemEnvironmentNewLine; } // If there are errors, report them and stop if (!stringIsNullOrEmpty(welcomeErrors)) { MessageBoxShow("Please x these errors: " + SystemEnvironmentNewLine + SystemEnvironmentNewLine + welcomeErrors, "Please Fill or Fix Some Data"); return; } // Tell the Signed event it s okay to allow signing SigningAllowed = true;
Barcode Drawer In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
Programming InfoPath in Action!
Generate Bar Code In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create barcode image in .NET framework applications.
// Continue with signing foreach (SignedDataBlock sig in SignedDataBlocks) // Sign only this block if (sigXPathExpressionEndsWith("my:Welcome")) { // Calling Sign requires a full trust form sigSign(); // Was it actually signed or canceled if (sigSignaturesCount > 0) ViewInfosSwitchView("RequestDetails"); else MessageBoxShow("You must sign the form " + "before continuing Please try again"); break; } SigningAllowed = false; }
Bar Code Printer In Visual Basic .NET
Using Barcode maker for .NET Control to generate, create bar code image in .NET applications.
The code for going through errors is quite easy First, the FormErrorsCollection object is exposed by the thisErrors (or just Errors) property Since FormErrorsCollection inherits from the ICollection interface, iterating through each FormError object is performed by a foreach loop Of the properties on the FormError object, the most interesting to us are Site (yielding the XPathNavigator of the node with the error) and Message Error will always provides a nonempty short error message, while MessageDetails might be more verbose MessageDetails is often empty unless a speci c data validation constraint provides details In this sample, MessageDetails is empty for all errors except for a few that we de ned through InfoPath design mode, such as the PhoneNumber and PreferredDate elds To detect whether there are any errors to show, we start with an empty welcomeErrors string If it s still empty after looping through any form errors, the code skips over showing a dialog because there are no errors A moment ago, we said that we re sinking the Signing event to programmatically determine when signing is permitted Essentially, we want the code from Listing 1530 (but nothing else) to initiate signing the form Other ways to add a signature include clicking the Click here to sign this section link in the view as well as using the Digital Signatures dialog accessed from the Tools menu No matter how signing is instigated, the Signing event is always red, which takes over the entire signing process For our scenario
Bar Code Printer In Java
Using Barcode encoder for Java Control to generate, create barcode image in Java applications.