I am working on an asp.net page. In which I am using a grid view. I want to be able to change the width of the bound fields. I am using
 `ControlStyle-Width="100px"` and `itemstyle-width` but I unable to change width of bound field. Can anyone tell me how this could be done?

```
  <asp:BoundField DataField="ptDob" HeaderText="PatientDob" HeaderStyle-HorizontalAlign="Left" SortExpression="ptDob" ControlStyle-Width="2500px"  />
                <asp:BoundField DataField="memid" HeaderText="MemberId" HeaderStyle-HorizontalAlign="Left"  ControlStyle-Width="100px"
                    SortExpression="memid" />
                <asp:BoundField DataField="memssn" HeaderText="MembeSsn" HeaderStyle-HorizontalAlign="Left"  ItemStyle-Width="100px"
                    SortExpression="memssn" />
                <asp:BoundField DataField="billType" HeaderText="BillType" HeaderStyle-HorizontalAlign="Left"  ItemStyle-Width="100px"
                    SortExpression="billType" />
                <asp:BoundField DataField="insuranceName" HeaderText="insuranceName" HeaderStyle-HorizontalAlign="Left"  ItemStyle-Width="100px"
                    SortExpression="insuranceName" />
                <asp:BoundField DataField="taxId" HeaderText="TaxId" HeaderStyle-HorizontalAlign="Left"  ItemStyle-Width="100px"
                    SortExpression="taxId" />
                <asp:BoundField DataField="attendingProvider" HeaderText="AttendingProvider" HeaderStyle-HorizontalAlign="Left"  ItemStyle-Width="100px"
                    SortExpression="attendingProvider" />
                <asp:BoundField DataField="parStatus" HeaderText="parStatus" HeaderStyle-HorizontalAlign="Left"  ItemStyle-Width="100px"
                    SortExpression="parStatus" />
                <asp:BoundField DataField="admittedDate" HeaderText="AdmittedDate" HeaderStyle-HorizontalAlign="Left"
                    SortExpression="admittedDate" />
                <asp:BoundField DataField="billedAmount" HeaderText="BilledAmount" HeaderStyle-HorizontalAlign="Left"

```