I would like a gridview to show a checkbox as true if there is data in a field

Can someone show me the code to making an ASPX.NET feild to be set to true open loading the data in C#.  I need to check for a feild to be populated then set this to true.  It keeps showing my template field in error.

if (License1 != string.Empty || License1 != null)
        {
           // I change the Item gridview name...
            CBAddLA1.Checked = true;



        }
        else
        {
            CBAddLA1.Checked = false;
        }

When I load the grid I would like to change the check mark to true if there is data in the field.  Otherwise, I want it to be false.  There seems to be no way to grab turn the checkbox on or off before binding the grid.

 <asp:TemplateField HeaderText="Advanced Clinical">
                    <EditItemTemplate>
                        <asp:CheckBox ID="CBAddLA1" runat="server" text='<%# Bind("LicenseAssociation1Default") %>' />
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:CheckBox ID="CBAddLA1" runat="server" 
                            Enabled="false" />
                    </ItemTemplate>
                    <ControlStyle CssClass="standard-text" Width="100px" />
                    <FooterStyle CssClass="standard-text" />
                    <HeaderStyle BackColor="#996633" CssClass="standard-text" ForeColor="White" 
                        HorizontalAlign="Left" />
                    <ItemStyle CssClass="standard-text" />
                </asp:TemplateField>

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