Display Image in gridview from the path which is in database

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns = "false" Font-Names = "Arial" >

<Columns>

<asp:ImageField DataImageUrlField=" imagepath " ControlStyle-Width="100" ControlStyle-Height = "100" HeaderText = "Preview Image"/>

</Columns>

</asp:GridView>

DataTable dt = new DataTable();

String strConnString = "your connectionsting";

string strQuery = "select imagepath from table1";

SqlConnection con = new SqlConnection(strConnString);

SqlCommand cmd = new SqlCommand(strQuery,con);

SqlDataAdapter sda = new SqlDataAdapter();

con.Open();

sda.SelectCommand = cmd;

sda.Fill(dt);

GridView1.DataSource = dt;

GridView1.DataBind();

con.Close();