By default, the field names appear in the grid's column headers, and values are rendered in text labels.
A default format is applied to non-string values and it can be changed.
Grid View control is one of the most powerful controls in ASP. This control displays database records in typical tabular form, and provides features such as Sorting, Paging, Selection and Editing without writing a single line of code.
It also has many different types of fields (columns) such as hyperlinks, images, checkboxes etc. To String()) Dim Product ID As String = Grid View1.
To cancel the update operation, set the collections, if necessary, before the values are passed to the data source.
A common way to use these collections is to HTML-encode the values supplied by the user before they are stored in the data source.
For this tutorial I am using Microsoft famous sample database Northwind. Also make sure you are setting Grid View Data Key Fields property to the Primary Key column of the Product Table such as Product ID.
If we move our mouse on to the variables, which hold the cell values, we can see the old value instead of new updated value (Refer the debugging Screen Shot at the Top).
This example shows how to edit and update records in a Grid View in ASP. This example is helpful in situations where an administrator needs to edit several records from the database.
One note will be helpful for you, while describing Columns in Grid View if you are using a boundfield then create objects of the control using cells[index] in the rowupdateing event of Grid View, but if you are using controls itself like Label or textboxes etc then use Fincontrol("stringid").
, the data can be rendered in separate columns, in the order it occurs in the data source.
provides the means to display a group of records from the data source (for example, the first 10), and then navigates to the "page" containing the next 10 records, and so on through the data.
event is raised when a row's Update button is clicked, but before the Grid View control updates the row.
Grid View control Row Command event will give you the Product ID of the product from the Grid View Rows when user will click any of the button in the Grid View. To handle click event of the buttons in Grid View you need to handle Row Command event of the Grid View control.
Following code will show you how you can get Row Index, Product ID and Command Name of the button when user click any button in the Grid View.
Now let’s create a method for executing the Update or Insert.
Six of those paramaters basically comes from the Text Box values that were entered in the page. Invalid Cast Exception: Unable to cast object of type 'System.