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VISUAL STUDIO 2018 GRIDVIEW HOW TO
VISUAL STUDIO 2018 GRIDVIEW UPDATE
VISUAL STUDIO 2018 GRIDVIEW CODE

Add a DropDownList control and set its ID to Categories. Start by opening the SummaryDataInFooter.aspx page in the CustomFormatting folder.

VISUAL STUDIO 2018 GRIDVIEW HOW TO

Once we've completed this first step, we'll look at how to include summary data. Step 1: Adding the Categories DropDownList and Products GridViewīefore concerning ourselves with adding summary information to the GridView's footer, let's first simply build the master/detail report. If you've not yet worked through the earlier tutorial, please do so before continuing on with this one. This tutorial, with its category to products master/detail interface, builds upon the concepts covered in the earlier Master/Detail Filtering With a DropDownList tutorial. The GridView will include a footer row that shows the average price and total number of units in stock and on order for products in that category.įigure 1: Summary Information is Displayed in the GridView's Footer Row ( Click to view full-size image) Specifically, we'll create a page that lists the categories in a drop-down list with the selected category's products displayed in a GridView.

In this tutorial we'll see how to overcome these challenges.

Injecting the summary data into the appropriate cells of the footer row.

Determining the summary data that is, how do we compute the average price or the total of the units in stock?.

Configuring the GridView to display its footer row.

This task presents us with three challenges: The GridView control can include a footer row into whose cells we can programmatically inject aggregate data. Such summary information is often displayed at the bottom of the report in a summary row. In addition to seeing each of the products' prices, units in stock, units on order, and reorder levels, a user might also be interested in aggregate information, such as the average price, the total number of units in stock, and so on. In this tutorial we'll see how to display aggregate data in this footer row. If ( information is often displayed at the bottom of the report in a summary row. Check if this is in the column we want. Private void DataGridView_CellFormatting(object sender, e) Here's an example that flags prices above or equal to $1,000.

VISUAL STUDIO 2018 GRIDVIEW UPDATE

It gives you the chance to update the cell style based on its content. CellFormatting fires just before the cell value is painted.

VISUAL STUDIO 2018 GRIDVIEW CODE

The key problem is that if the user edits the data or if your code changes the bound data source, the cell highlighting won't be updated to match.įortunately, the DataGridView provides a CellFormatting event just for this purpose. This approach will work, but it's not the best choice. Using your knowledge of the DataGridView object model, you might be tempted to iterate through the collection of cells in a specific column looking for the values you want to highlight. In both of these cases, you'll need to format the individual cell. For example, you might want to flag data in a column that is greater or less than a certain value, such as due dates that have passed on a project schedule list or negative rates of return on a sales analysis. However, sometimes you need to set the style for specific, individual cells. These styles are then used for the entire grid, entire columns, or entire rows, respectively. The first choice for formatting cells is to set styles through the higher-level DataGridView, DataGridViewColumn, and DataGridViewRow objects.