Có 20+ tài liệu thuộc chủ đề "ASP.NET Web developer's Guide"
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instance for SharePoint 2010 96 layer testing 206. static capacity requirement for SharePoint 199 stealth install 8, 10. for resource documentation building 118–122 for SharePoint install 225–227. technologies, required for SharePoint 2010 94 templates 204. posting to SharePoint One-Stop Shop 107 for project manager for SharePoint administrator 92 for SharePoint architect 91–92 for SharePoint One-Stop Shop 93 for SharePoint teams...
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Microsoft ® ADO.NET 4 Step by Step. Part I Getting to Know ADO.NET. Introducing ADO.NET 4. Binding Data with ADO.NET. Part I Getting to Know ADO.NET 1 Introducing ADO .NET 4. What Is ADO.NET. Why ADO.NET. Major Components of ADO.NET. Extensions to ADO.NET. Chapter 1 Quick Reference. Chapter 2 Quick Reference. Chapter 3 Quick Reference. Chapter 4 Quick Reference. Chapter...
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Chapter 9 Quick Reference. Chapter 10 Quick Reference. Chapter 11 Quick Reference. Chapter 12 Quick Reference. Part III Entity Framework. 13 Introducing the Entity Framework. Understanding the Entity Framework. Defining the Entity Framework’s Terms. Understanding the Entity Framework’s Layers. Using the Entity Framework. Chapter 13 Quick Reference. Using the Entity Data Model Wizard. Working with the Mapping Details Panel. Chapter...
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Most of the chapters in this book include exercises that let you interactively try out new material learned in the main text. When a list of files appears, locate and download the ADO.NET 4 SBS Examples.zip file.. Open the ADO.NET 4 SBS Examples.zip file that you downloaded from the book’s web site.. In the Object Explorer panel, right-click on the...
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ADO.NET Entity Framework, LINQ, Other Components. FIGURE 1-1 Key ADO.NET elements.. At the data-shaped heart of the library is the DataTable. Each table defines DataColumn items, each representing the individual data values that appear in the table’s records. One DataRow entry exists for each record of data stored within a table, providing access to the distinct columnar data values. ADO.NET...
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Follow the steps in the Connection Wizard.. Remove a data source from a project Select the .xsd file in the Solution Explorer.. Building Tables of Data. Understand the ADO.NET classes used to create tables. The focus of all data in ADO.NET is the table—or more correctly, the DataTable. This class, located at System.Data.DataTable, defines a single table in which strongly...
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Open the source code view for the TableDetails form. Just below the comment, “Add the columns to the display list,” add the following statements to access individual columns of the DataTable:. foreach (DataColumn oneColumn in ActiveTable.Columns) this.AllColumns.Items.Add(oneColumn);. if (this.AllColumns.Items.Count. this.AllColumns.Items.Add("No columns available");. Just below the comment, “Extract the column details,” add the following statements to access members of the DataColumn:....
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Explain how ADO.NET differentiates between pending and final data values. Adding columns to a DataTable is an essential step in managing data in ADO.NET, but the columns themselves contain no data. To store actual data values in an ADO.NET table, you must use the DataRow class. Although you will be able to run the application after each exercise, the expected...
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To remove all rows from a table at once, use the DataTable.Rows object’s Clear method.. someTable.Rows.Clear();. someTable.Rows.Clear(). The features shown previously for adding, modifying, and removing data records within a DataTable all take immediate action on the content of the table. When you use the Add method to add a new row, it’s included immediately. Any field-level changes made within...
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56 Microsoft ADO .NET 4 Step by Step. When you attempt to provide invalid data—incorrect data types, violations of business rules, duplicate account names—the program provides the appropriate error messages.. This chapter discussed the DataRow class, the final destination of all data in ADO.NET. With one instance created per data record, the DataRow class manages each individual columnar field. When...
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66 Microsoft ADO .NET 4 Step by Step. Note This exercise uses the “Chapter 4 VB” sample project and continues the previous exercise in this chapter.. Locate the Try...Catch statement just after the “Apply the filter and sorting list” com- ment. In the Try block, add the following statement:. This line performs the actual row selection, returning the optionally sorted...
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Many-to-Many In this third and most complex type of link, one record in the first table is associated with zero or more records in the second table, and each record in the second table can also be associated with zero or more records in the first table.. Fortunately, all three of these model relationships share a common physical implementation concept:...
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86 Microsoft ADO .NET 4 Step by Step. Select the first row in the Flights field, the one with ID 759. Although the first row in the Flights field has been removed, its child records in the Legs field remain. Note This exercise uses the “Chapter 5 VB” sample project and continues the previous exercise in this chapter.. Just after...
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As with single-table aggregation, the expression can reference any valid column in the child table, including other expression columns. Consider the following code, which calculates each customer’s total orders and stores the result in an expression column in the customer (parent) table:. customers.Columns.Add("ID", typeof(int));. customers.Columns.Add("Name", typeof(string));. customers.Rows.Add(new Object Coho Winery"});. customers.Rows.Add(new Object Fourth Coffee"});. expression column adds sales tax to...
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106 Microsoft ADO .NET 4 Step by Step. This chapter introduced two ADO.NET features that enhance its core functionality: aggre- gates and data views. Containing no data, the DataView includes an indexed reference to each row in the linked DataTable. Changes made to the view are reflected in the table, and vice versa. Create a string containing the expression Avg(xxx),...
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116 Microsoft ADO .NET 4 Step by Step. Open the “Chapter 7 VB” project from the installed samples folder. This routine produces the XML content from a sample DataSet containing two tables: Customer and Order.. Just after the “Set the XML namespace” comment, add the following statements:. This code sets the namespace and prefix values for both of the sample...
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The .NET Framework also includes string builders for OLE DB (System.Data.OleDb.OleDb ConnectionStringBuilder) and ODBC (System.Data.Odbc.OdbcConnectionStringBuilder) con- nections. Because they are standard text strings, how or where you store the connection strings used in your applications is up to you. The Data Source Connection Wizard, demonstrated in Chapter 1, offers to store its generated connection string in your application’s settings file.....
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Data definition statements Commands that modify tables and other structures that support the data content. ADO.NET lets you process any of these statement types through instances of the System.. Data.SqlClient.SqlCommand class. This class encapsulates one or more SQL statements and includes methods that request processing of the statement(s) on a SQL Server connection, optionally returning query results.. Note In the...
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SQL Server supports returning multiple record sets in a single query. When retrieving multiple record sets, the returned SqlDataReader initially refers to the first set of records. The SQL Server provider does not support nested sets.. This class centralizes much of the database func- tionality for the sample application. Locate the GetConnectionString function, a routine that uses a SqlConnectionStringBuilder to...
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SqlCommand salaryUpdate = new SqlCommand(sqlText, linkToDB);. Dim salaryUpdate = New SqlCommand(sqlText, linkToDB). The SqlCommand class includes a Parameters collection to which you add the specific re- placement values for each placeholder. You wrap up each parameter in an instance of SqlParameter, setting its properties as needed, and adding it to the SqlCommand.Parameters collection. When you execute the command, ADO.NET passes...