In this blog post, we will see how to add custom column type to our magento admin grid.
Specifically, we will see how to add a thumbnail image column to our grid.Before reading the post, i assume your familiar with Admin Grid and Forms, and already have module setup with the Grid Working.
Now lets start with how to add a custom column, in this blog i will assume the name of my module to be Excellence_Employee. I will be showing an example on how to add an image to a grid column.
Adding Image to Grid
Open your Grid.php file and add the code in the _prepareColumns() function
This is all that is needed, if you open your grid you show see an image there. You have to adjust path/src of the image to make it show correctly. Here the $this->getColumn() function is the important function, you can access the array you pass in the Grid.php file in the getColumn() function. For example, if we write in Grid.php file