Visual Basic

Matthew MacDonald, Bill Hamilton's ADO.NET in a Nutshell PDF

By Matthew MacDonald, Bill Hamilton

ISBN-10: 0596003617

ISBN-13: 9780596003616

Written via specialists at the MicrosoftÂR .NET programming platform, ADO.NET in a Nutshell supplies every little thing .NET programmers might want to get a jump-start on ADO.NET know-how or to sharpen their talents even additional. within the culture of O'Reilly's In a Nutshell sequence, ADO.NET in a Nutshell is the main whole and concise resource of ADO.NET info to be had. ADO.NET is the suite of knowledge entry applied sciences within the .NET Framework that builders use to construct purposes providers gaining access to relational information and XML. Connecting to databases is a primary a part of so much purposes, whether or not they are net, WindowsÂR, disbursed, client/server, XML internet providers, or whatever completely diversified. yet ADO.NET is considerably various from Microsoft's past facts entry applied sciences - together with the former model of ADO - so even skilled builders have to comprehend the fundamentals of the hot disconnected version prior to they begin programming with it. present with the .NET Framework 1.1, ADO.NET in a Nutshell deals one position to appear should you need assistance with something relating to this crucial know-how, together with a connection with the ADO.NET namespaces and item version. as well as being a useful reference, this e-book offers a concise origin for programming with ADO.NET and covers various matters that programmers face while constructing internet functions or internet prone that depend upon database entry. utilizing C#, this e-book offers genuine international, sensible examples to help you positioned ADO.NET to paintings instantly.

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NET code. The most common type of parameter is an input parameter, which carries information from your application to the data source. You can use an input parameter when calling a stored procedure or when coding a parameterized query. In addition, you can use output parameters, which return information from the data source to your code, or bidirectional parameters, which transmit values in both directions. Output and bidirectional parameters are used only when you are making stored procedure calls.

Output and bidirectional parameters are used only when you are making stored procedure calls. Every Command object has an associated collection of Parameter objects (referenced by its Parameters property). The Parameter object is a provider-specific object, which means a SqlCommand uses a SqlParameter, an OleDbCommand uses an OleDbParameter, and so on. 1 Creating Parameters In order to create a Parameter object, you must specify a parameter name, and the exact data type for the information it will contain.

All these counters provide two options: a global total or a process-specific total (you simply choose the corresponding application name). Table 3-6. Connection pooling performance categories Counter Description Current # connection pools Current number of pools. Each pool contains a group of connections that can be reused for different clients. Separate pools will be created for requests with different connection strings or for connections in different transaction contexts. Current # pooled and nonpooled connections The total number of connections, including those in the pool.

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ADO.NET in a Nutshell by Matthew MacDonald, Bill Hamilton

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