In this example, I am going to retrieve values from categories table of Northwind database. Drag a Grid View into the Web Form and assign Data Key Names property with the primary key column i.e. In the gdview_Row Editing and gdview_Row Deleting event, we have used the below code to retrieve categoryid from datakey of Grid View, int catid = int.
before that i want just using Find control and casting and then retrieving all lot code. If values are same they could notify user to change the value(give new cell value).
Here we can update Name, Emp_Code and Emp_Age fields depending on the Id field of the "EMPLOYEE" table.
Create SQL Connection We need a connection with a Microsoft SQL Server database so we can access data and perform an operation on it.
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However, when I set that column to 'visible=false', I'm unable to retrieve the value. When debugging, I can see 'row' is populated, and has cell values available, but I'm guessing the cells aren't named and can only be referred to by index number.
So we need to create a Stored Procedure on which we pass all parameters that are updateable along with the primary key value, in other words the row data's key value that is being updated.
We use the Row Updating event of Grid View to update the record in the database table.
However, when I click on 'Update' on a row (after clicking'edit' and making a change), I'm not able to find or see the oldvalues or newvalues in Grid View1_Row Updating. Zip Grep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.
Now we define a method for opening a connection with the relation database and returns a SQL connection object depending on the connection string that is passed as a parameter of the Sql Connection class constructor.
Delete a Record We can delete a record from the database table by clicking on the delete button that is in the Delete column of the Grid View.
I'm adding the ID column to the datagrid as well, but there is no need for the end user to actually see the id, I just need it for updating. If not, then set the Data Key to ID [in the Source code] and this code should only retrieve the value, not edit or update it [unless you specify the Text Box thing]: ) However, nothing is returned into those variables.
In this article we will look at how to update or delete a record in a database table using a Grid View control.We define a connection in the web.config file and give a name to the connection string.