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| | Total Hits: 121 | Today: 0 | Author: Microsoft Corporation | Rating:  |
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You can use ADO.NET DataTable objects to delete rows and mark them as "Deleted." This article demonstrates how to retrieve the values of a row whose DataRowState enumeration is set to DataRowState.Deleted.You can use the DataRowVersion.Original enumeration value to retrieve the values of a row that has the DataRowState.Deleted enumeration value. You must use DataRowVersion.Original because the values of a deleted row are not available for the current state (DataRowVersion.Current).... |
| | Total Hits: 105 | Today: 0 | Author: Microsoft Corporation | Rating:  |
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The Find method queries the primary key column of the DataTable, and locates the record that exactly matches the value that is passed in the search criteria. If the DataTable does not have a primary key, a MissingPrimaryKeyException is raised. The Find method has the following limitations:
• The Find method is not case sensitive.
• You cannot use Wildcard characters in the Find method. For example, when you use the following code, you may not find all the rows starting with Ch. Instead, yo... |
| | Total Hits: 47 | Today: 0 | Author: Microsoft Corporation | Rating: |
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This article demonstrates how to use an OLE DB Universal Data Link (.udl) file to specify the connection string that an ADO.NET OleDbConnection object uses to establish a database connection. OLE DB Universal Data Link (.udl) files provide a convenient way to create and verify an ActiveX Data Objects (ADO) connection string that is used to connect to an OLE DB data source. The connection string information is persisted in a specific format to a file with the .udl extension. You can reference a .... |
| | Total Hits: 124 | Today: 0 | Author: George Poth | Rating: |
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When you ask in forums which edition of Microsoft Visual Basic .NET you should buy, most experienced programmers will tell you to go for anything but the standard edition. Why? Well, they say that you can't make .dll's and all the good pro stuff with the standard edition. I got news for you: you can make your .dll's with the standard edition. In fact, you can use the Class Library, Windows Control Library, Web Control Library, yep, and even Windows Service.... |
| | Total Hits: 88 | Today: 0 | Author: Microsoft Corporation | Rating: |
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This article demonstrates how to marshal an object by reference to a remote server. When you marshal an object by reference, the runtime creates a transparent proxy so that the server can make calls back to the object on the client. The only thing that is sent to the server is the proxy. The proxy marshals the call backs to the client. This article is broken into three parts: The server object, the server application, and the client application.... |
| | Total Hits: 115 | Today: 0 | Author: Microsoft | Rating: |
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This article demonstrates how to automate Excel to create a command bar that contains buttons, drop-down list boxes, combo boxes, and pop-up menus.... |
| | Total Hits: 100 | Today: 0 | Author: MuhammadAdeel. | Rating:  |
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This article is for programmers who have been programming using different languages for many years and now want to develop their applications using Microsoft .NET without rewriting their existing code logic. In this article, I have explained how a C++ (unmanaged) class can be reused in Microsoft .NET without any modifications.... |
| | Total Hits: 660 | Today: 0 | Author: Microsoft | Rating: |
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I set out to write this article about Visual Basic® 2005, but that left too many things to choose from. I could wander through the entire feature list, giving you a bit of information on cool IDE features like Edit and Continue, IntelliSense® Code Snippets, or the Exception Assistant; skim over the advanced language enhancements like generics, partial classes, and unsigned types; and barely touch on all the cool Microsoft® .NET Framework enhancements around Windows® Forms, data binding, ClickOnc... |
| | Total Hits: 222 | Today: 0 | Author: Microsoft | Rating: |
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Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will no... |
| | Total Hits: 405 | Today: 0 | Author: Jon Person | Rating: |
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In part one of this article, I described how to write an interpreter for raw GPS NMEA data. The article included source code in VB.NET which harnessed the power of GPS satellites to determine the current location, synchronize the computer clock to atomic time, and point to a satellite on a cloudy day. The interpreter also works with hand-held devices and supports international developers. Yet, the interpreter was really not suitable for commercial use because it did not monitor precision. Withou... |
| | Total Hits: 1622 | Today: 0 | | Rating: |
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The step-by-step procedure in this article demonstrates how to provide file drag-and-drop functionality in a Visual Basic .NET application. A ListBox control is used as the destination of the file drag-and-drop procedure.
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| | Total Hits: 520 | Today: 0 | | Rating: |
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This article describes how to use Visual Basic .NET to return a strongly-typed array from the ToArray(type) method. This article applies to Visual Basic .NET if you set Option Strict On. If you set Option Strict Off, Visual Basic allows the implicit cast that is described in the article.... |
| | Total Hits: 488 | Today: 0 | | Rating: |
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This article describes how to use Visual Basic .NET to create a custom configuration section handler for ASP.NET.... |
| | Total Hits: 412 | Today: 0 | | Rating: |
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This article illustrates how to create a simple, remote server that another application can access. The application that accesses this server can be located on the same computer, on a different computer, or on a different network. The remote server is broken into two parts: the server object and the server application. The server object is the object with which the client communicates, and the server application is used to register the server object with the Remoting runtime.... |
| | Total Hits: 523 | Today: 0 | | Rating: |
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This article demonstrates how to use the DialogResult property in Windows Forms. You can use the DialogResult property to create dialog boxes in Windows applications.
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| | Total Hits: 1299 | Today: 0 | | Rating: |
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An automation controller, such as Microsoft Visual Basic, can automate Microsoft Internet Explorer to send data by using the POST method to an HTTP server (such as Microsoft Internet Information Services [IIS]). This article explains how to automate Internet Explorer to perform a POST of form data from a Visual Basic .NET application. Although the examples illustrate automation of the whole Internet Explorer application, the same techniques can be applied to the Web Browser ActiveX control when ... |
| | Total Hits: 1680 | Today: 0 | | Rating: |
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This step-by-step article explains how to create a simple Visual Basic 6.0 application, and then upgrade the application to Visual Basic .NET by using the Visual Basic Upgrade Wizard in Visual Studio .NET.
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| | Total Hits: 945 | Today: 0 | | Rating: |
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The System.Security.Cryptography classes in the Microsoft .NET Framework make it easy to compute a hash value for your source data. This article shows how to obtain a hash value and how to compare two hash values to check whether they are identical.... |
| | Total Hits: 1377 | Today: 0 | | Rating:  |
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This article describes how to use ActiveX Data Objects (ADO) .NET to connect to a database and run a command (such as UPDATE, INSERT and DELETE) by using a Visual Basic .NET console application.... |
| | Total Hits: 669 | Today: 0 | | Rating: |
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The .NET Framework exposes classes that allow you to programmatically access the Visual Basic .NET language compiler. This might also be useful if you want to write your own code-compiling utilities. This article provides sample code that allows you to compile code from a text source. The application allows you to either just build the executable or build the executable and run it. Any errors that occur during the compilation process are displayed on the form.... |
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