having difficulty reducing the height of gridview in a form

<div style="height: 100px">
                  <asp:GridView ID="GridView1" runat="server" AllowPaging="True"
                      AllowSorting="True" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"
                      Height="10px" onselectedindexchanged="GridView1_SelectedIndexChanged1"
                      PageSize="8" Width="754px">
                      <Columns>
                          <asp:CommandField ShowSelectButton="True" />
                          <asp:BoundField DataField="IDNO" HeaderText="IDNO" SortExpression="IDNO" />
                          <asp:BoundField DataField="ID_CODE" HeaderText="ID_CODE"
                              SortExpression="ID_CODE" />
                          <asp:BoundField DataField="CUSTOMER" HeaderText="CUSTOMER"
                              SortExpression="CUSTOMER" />
                          <asp:BoundField DataField="APPRS_NO" HeaderText="APPRS_NO"
                              SortExpression="APPRS_NO" />
                          <asp:BoundField DataField="INT_NO" HeaderText="INT_NO"
                              SortExpression="INT_NO" />
                          <asp:BoundField DataField="INT_NAME" HeaderText="INT_NAME"
                              SortExpression="INT_NAME" />
                      </Columns>
                  </asp:GridView>
                  <asp:SqlDataSource ID="SqlDataSource1" runat="server"
                      ConnectionString="<%$ ConnectionStrings:Credit_AppConnectionString12 %>"
                      SelectCommand="SELECT [IDNO], [ID_CODE], [CUSTOMER], [APPRS_NO], [INT_NO], [INT_NAME] FROM [LOANS] ORDER BY [IDNO]">
                  </asp:SqlDataSource>
              </div>