... xmlns="http://www.tempuri.org/CategoriesDS_AnnotatedNull.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com :xml- msdata" xmlns:codegen="urn:schemas-microsoft-com :xml- msprop" ... rows collection and display columns. foreach(CategoriesDS.CategoriesRow row in ds.Categories) [ Team LiB ] Recipe 2.19 Replacing Null Values in a StronglyTypedDataSet Problem When a column ... (annotatedRadioButton.Checked) { // Create the typedDataSet without null annotation. CategoriesDS_AnnotatedNull ds = new CategoriesDS_AnnotatedNull( ); // Fill the Categories table within DataSet. ...
... FindByCustomerID() method. You can check if a column value contains a null value using methods such as IsContactNameNull(), and you can set a column to null using methods such as SetContactNameNull(). You'll ... sqlConnection1.Close(); } Feel free to compile and run the example form. Modifying Data Using a StronglyTypedDataSet In Chapter 10, you saw how to create and use a stronglytyped ... You'll find a completed VS .NET example project for this section in the StronglyTypedDataSet2 directory. You can open this project in VS .NET by selecting File ➣ Open ➣ Project and opening...
... and create a DataSetfrom an XML file. Solution Use the XmlTextWriter and XmlTextReader classes. The sample code contains three event handlers: Write Button.Click Creates a DataSet containing ... FileAccess.Write); // Create an XmlTextWriter using the file stream. XmlTextWriter xtw = new XmlTextWriter(fs, Encoding.Unicode); try { // Write the XML to the file. ds.WriteXml(xtw, ... FileAccess.Read); // Create an XmlTextReader using the file stream. XmlTextReader xtr = new XmlTextReader(fs); try { // Read the schema into the DataSet. DataSet ds = new DataSet( ...
... java.sql.Struct interface, the Struct class also has the following proprietary constructor and methods, all of which can throw a SQLException: STRUCT STRUCT(StructDescriptor type, Connection conn, Object ... which can throw a SQLException: OracleConnection getConnection( ) StructDescriptor getDescriptor( ) STRUCT getSTRUCT( ) Object getValue( ) Object getValue(Dictionary map) boolean isConvertibleTo(Class ... OracleConnection getConnection( ) StructDescriptor getDescriptor( ) Datum[] getOracleAttributes( ) boolean isConvertibleTo(Class jClass) Object toJdbc( ) 15.7.5 REF Implements Ref The oracle.sql.REF...
... DataRowView object is used to return the underlying DataRow object. The typedDataSet classes—including the DataTable, DataColumn, and DataRow objects—inherit from the ADO.NET disconnected classes ... objects contain DataRowView objects. The Find( ) method of the DataView returns the index of the row matching the specified search criteria. You can use the index to get a single DataRowView from ... catch (Exception ex) { MessageBox.Show(ex.Message); } } Discussion The DataView indexer in C# or Item property in VB.NET allows access to the DataRowView objects, or Windows Form control...
... btnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogin.Click Dim wsSec As localhost.SecurityServices wsSec = New localhost.SecurityServices() If wsSec.TestUserPassword(Me.txtUser.Text, ... object (see Figure 13.14). Otherwise, a message box appears saying that you cannot see the data. 1. Open the SecurityWebServices Web Service project you created in How-To 13.2. Add the code from ... xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com :xml- msdata"> - <xs:element name="NewDataSet" msdata:IsDataSet="true">...
... tic ; B = ddom(A) ; toc tic ; B = ddomloops(A) ; toc Since not every loop can be accelerated, writing code that has no for or while loops is still important. As you become practiced ... (mxMalloc, mxFree, and mxCalloc) are much easier to use than their ANSI C counterparts. If a memory allocation request fails, the mexFunction terminates and control is passed backed to ... world\n") ; } Compile and run it by typing: mex hello .c hello If this is the first time you have compiled a C MEX-file on a PC with Microsoft Windows, you will be prompted to select a C compiler....
... xrCust(intCurrAtt) & vbCrLf Next Else strOut &= xrCust.Value & vbCrLf End If End If End While Catch excp As Exception strOut &= "Following Error Occurred: ... using the BuildCnnStr() function throughout this book. You should add this function to a module or copy it from other chapters. Here is the code for the function: Function BuildCnnStr(ByVal ... will create a Command object with the Transact-SQL SELECT statement that you want to execute. However, at the end of your SQL statement, you will add the clause FOR XML mode. The mode can be...
... Service Architectures Overview 1 Service-Oriented Architecture 2 Web Service Architectures and Service-Oriented Architecture 5 Roles in a Web Service Architecture 9 The Web Services Programming ... root directory of the compact disc, double-click Default.htm or Autorun.exe. x Developing XML Web Services Using Microsoft® Visual C# ™ .NET Beta 2 Student Materials Compact Disc Contents ... Web Services in a UDDI Registry Developing XML Web Services Using Microsoft® Visual C# ™ .NET Beta 2 ix Trainer Materials Compact Disc Contents The Trainer Materials compact disc contains...