Hi fareed.fd7,

Will you please explain in more detail about your requirement?

hi sir,

see sir i above screen short i'm going to add new category to the selected branch code, now i need select all option in branch code dropdown list, so that i can add same category to all 3 branch codes.

and other one is supporse if i want to add new category only to the branch code 1AB and 2AB, not 3AB, that time i need check box to select two branch codes, so how can i acheive that could you help me

see sir i above screen short i'm going to add new category to the selected branch code, now i need select all option in branch code dropdown list, so that i can add same category to all 3 branch codes.

and other one is supporse if i want to add new category only to the branch code 1AB and 2AB, not 3AB, that time i need check box to select two branch codes, so how can i acheive that could you help me

Hi fareed.fd7,

Please refer the below link.

Saving and retrive multiple selected values of Bootstrap DropDownList using C# in ASP.Net