How to Programmatically Iterate DataGrid Rows in WinForms скачать в хорошем качестве

How to Programmatically Iterate DataGrid Rows in WinForms

Learn how to efficiently iterate through rows in a WinForms DataGrid to manage data updates and validation, simplifying your user interactions. --- This video is based on the question https://stackoverflow.com/q/6430/ asked by the user 'Mike' ( https://stackoverflow.com/u/785/ ) and on the answer https://stackoverflow.com/a/6435/ provided by the user 'NotMyself' ( https://stackoverflow.com/u/303/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, comments, revision history etc. For example, the original title of the Question was: How to programmatically iterate datagrid rows? Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 3.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 3.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- How to Programmatically Iterate DataGrid Rows in WinForms If you find yourself navigating the world of WinForms after years spent in the realm of web development, you may encounter a few curveballs that can slow down your progress. One common challenge developers face is how to programmatically iterate through data in a DataGrid. This post will tackle that question head-on by providing you a clear approach to access and manipulate rows and columns within your DataGrid effectively. The Challenge When working with Windows Forms application, you may often bind an ArrayList of business objects to a DataGrid. This approach presents a problem when you need to allow users to edit data and then save any changes back to the database. The fundamental question arises: how do you access and iterate through the rows of a DataGrid in order to track those modifications? Moreover, you might also want to implement real-time validation as users edit the cells. This leads to another concern: does using an ArrayList as the DataSource limit your ability to iterate through the rows? The Solution: Iterating Through DataGrid Rows Fortunately, iterating through the rows of a DataGrid is quite straightforward once you understand the necessary syntax. Below are several methods you can use to loop through the rows and perform your desired actions, such as saving changes or validating input. Method 1: Using foreach The easiest method to iterate through the DataGrid rows is by using the foreach loop. This method allows you to easily access each row without worrying about the iteration index. [[See Video to Reveal this Text or Code Snippet]] Method 2: Explicitly Specifying Row Type If you want to enhance readability or are working with specific data types, you can use a strongly typed foreach statement. [[See Video to Reveal this Text or Code Snippet]] Method 3: Traditional for Loop If you prefer using indexed access or need to manipulate the index for specific purposes, a traditional for loop can be utilized. [[See Video to Reveal this Text or Code Snippet]] Validation of Cells in Real-Time As mentioned in the original question, validating individual cells in real-time as they are edited can be an essential feature. Here's a quick overview of how you might implement live validation within a WinForms DataGrid: Event Handling: Use event handlers such as CellValueChanged or CellValidating to respond to changes immediately. Validation Logic: Within the event handler, write logic to check the validity of the input and provide feedback to the user (e.g., changing the cell color or displaying a tooltip message). Closing Thoughts Returning to WinForms after focusing on web development may present some unique challenges, but with these strategies for iterating through a DataGrid, you can effectively manage user inputs and updates. Don't hesitate to experiment and find the best approach that suits your specific application's needs: whether it’s using simple loops or event-driven logic for validation. By integrating these solutions into your project, you should find yourself navigating the intricacies of Windows Forms with much more confidence!