is it possible to add checkbox inside dropdown as i describen in attached image?i want to choose multiple value in drodown..i want to check multiple values and then filter list with checked values
You can use some jQuery plugins or jQuery UI Widget to implement your requirement. One initialize the custom control/plugin/widget typically by calling some dataInit callback of searchoptions in the corresponding column of colModel.
Another way will be to use select2 plugin with the option multiple: true. It have another interface, but it can be used to implement multiselect too.
Probably you posted in the wrong forum. jqGrid is jQuery plugin written in JavaScript. It’s open source and can be downloaded from trirand.com. There are some commercial solutions like from trirand.net for example. To understand the products good you still should have the knowledge of original JavaScript library, but you do many things in C# (or ASPX). You should read the corresponding documentation (like “Searching (Filtering) data” part of the documentation). In any way you should post your questions to the correct forum (for example here) and not in the current one.