GridView automatically re-sizing itself - asp.net

Question

I have a GridView in asp that keeps re-sizing itself. Can i in some way fix the size of the GridView so it doesn't do that ? The GridView keeps shrinking itself although the data in it has the same length or is smaller
my asp code:
<asp:GridView ID="Grid" runat="server" AllowPaging="True" PageSize="18" OnPageIndexChanging="Grid_PageIndexChanging"
ForeColor="Black" GridLines="Both" Width="991px" Height="600px" RowStyle-HorizontalAlign="Center"
BackColor="White" BorderColor="#999999" BorderWidth="1px"
AutoGenerateColumns="False" style="margin-left: 9px">
<Columns>
<asp:TemplateField HeaderText="RequestID">
<ItemTemplate>
<a target = "_blank" href="www.danx/default?request=<%# Eval("request")%>"><%# Eval("request")%></a>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Barcode">
<ItemTemplate>
<a target = "_blank" href="www.danx/default?barcode=<%# Eval("barcode")%>"><%# Eval("barcode")%></a>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="adrid" HeaderText="AdrID" SortExpression="AdrID" />
<asp:BoundField DataField="name" HeaderText="Navn" SortExpression="Name" />
<asp:BoundField DataField="street" HeaderText="Vej" SortExpression="Street" />
<asp:BoundField DataField="houseno" HeaderText="Husnr"
SortExpression="HouseNo" />
<asp:BoundField DataField="postal" HeaderText="Postnr"
SortExpression="Postal" />
<asp:BoundField DataField="city" HeaderText="By" SortExpression="City" />
<asp:BoundField DataField="country" HeaderText="Land"
SortExpression="Country" />
<asp:TemplateField HeaderText="Lokation">
<ItemTemplate>
<a target = "_blank" href="https://maps.google.dk/maps?q=<%# Eval("latitude")%>,<%# Eval("longitude")%>"><%# Eval("latitudetxt")%></a>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="date" HeaderText="ReceivedDate"
SortExpression="ReceivedDate" />
</Columns>
<FooterStyle BackColor="#CCCCCC" />
<RowStyle HorizontalAlign="Center"></RowStyle>
<SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#999999" ForeColor="Blue" HorizontalAlign="Center" />
<HeaderStyle BackColor="DarkGray" Font-Bold="True" ForeColor="Black" />
<AlternatingRowStyle BackColor="LightGray" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#808080" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#383838" />
</asp:GridView>
Can you help me please?

Answer 1

Since you are using a fixed width (991px) for the gridview, the columns would shrink/adjust as their content grow larger. One thing you could do is give fixed width to those columns you don't want resized (in % or fixed). e.g.
<ItemTemplate>
<a target = "_blank" href="www.danx/default?request=<%# Eval("request")%>"><%# Eval("request")%></a>
</ItemTemplate>
You can also increase the size of the GridView to easily accomodate the columns e.g. Setting it to 100% if the container is greater 991px

Answer 2

is this maybe to do with the data in the cells being too long without spaces.. you can always use
td{word-wrap:break-word;}
or make sure you have spaces.
or even use styles for the columns, which set the widths explicitly
<asp:TemplateField HeaderText="RequestID" HeaderStyle-CssClass="setWidthClass">
<ItemTemplate>...
or even
<asp:TemplateField HeaderText="RequestID" ItemStyle-Width="100">
of course it may be nothing to do with this.