How to return match data base value to label in winform

My Data table Employee. It have ID(Auto Increment), EmpID,Name...

In my winform i have text box to enter Emp Value. name will return to label when button click.

In my model I have linq my data table.
my query is.. var v= from a in dt.Emps where v.EmpID=textbox1.text select a.name;

I don't know how to pass textbox1 value to query... can you help me...?