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This article will explain in detail how to use the Data Report control in VB.NET. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

How to use 1.VB.NET Data Report control

Because it is a control that comes with VB, it is relatively convenient to use. The way to use it is to first select the add Data report option under the Project menu so that the VB.NET Data Report control is selected into the application.

Most cases of using Data report use data binding mode, that is, bind this control to the data table of the database so that you can easily design the report without writing code. To use data binding, you must specify a data source, where the data source is not a data control but a data environment (Data Environment). Select the "add Data Environment" option under the "Project" menu to add the data environment to the application. The data environment has two important attributes: Connection and Command, the former connects to the specified database and the latter connects to the specified data table. Once both are set up successfully, the data environment can be used as the data source. You just need to set the DataSource property of Data report to the previous data environment object and set DataMember to the Command object of the data environment object.

2.VB.NET Data Report control interface elements

After completing the data binding of the VB.NET Data Report control, you can directly control the production and display of the report. Let's first familiarize ourselves with the display interface of the VB.NET Data Report control:

The VB.NET Data Report control consists of five areas, namely, the report header, the page header, the detail area, the page footnote and the report footnote. The report header and the report footer are used for the top and bottom of the whole report, respectively, they will appear on every page of the whole report, and some fixed text such as report name and time can be placed; the page header and page footer can only appear in the top and bottom of the current page, that is, it can only appear in the current page, not in other pages, and can place some quantities such as page numbers that change with the page. The detail area is the area used for the actual display, and it is the area we are most concerned about. We can control the actual display output of the report by placing display controls in this area. Here is how to place a text box control. In fact, you only need to set its DataMember and Datafield in the case of binding. The former is used to specify the data table and can be set as the Command object of the previous data environment object, and the latter is the specified data segment, that is, the specified field of the bound database. In this way, you don't need to write any code to realize the display of the report.

Printing function of 3.VB.NET Data Report control

For the printing of the report, you can directly use the printing function of Data report, that is, you can achieve simple report printing. However, in order to achieve more complex printing functions, it can also be carried out through program control. Here is just an implementation idea: first, we need to make a button control to display the "print settings" window, through which the user can set the relevant parameters of printing, and then use the printer object embedded in VB in the sub-module to achieve real printing, which can locate the current position of the print and control parameters such as the font of the print. So combined with the "print Settings" window, you can achieve a print function similar to that in word.

This is the end of this article on "how VB.NET uses Data Report controls". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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