Sys is not defined

I faced this problem, i did what had mentioned in the above screen shot. Its working fine for me.

how to identify the sql server edition

select serverproperty('edition')
The result will look something like:
32-bit: Enterprise Edition
64-bit: Developer Edition (64-bit)

Determine Size of a Table in SQL Server

sp_spaceused ‘Tablename’

How to read child nodes from specific xml file

you need to use here is theXLINQ. After adding the reference to System.Xml.Linq 
in your program do write the below code. 
XElement companyInfo = XElement.Parse(
                    <CORPORATE ID=""C45RT4C"" NAME=""NEW COMPANY LTD."">
                        <LOCATION ID=""P88972FC"" NAME=""EASIER"">
                            <SUBLOCATION ID=""S89872FE"" NAME=""400462""/>
                        <LOCATION ID=""PDRD2905"" NAME=""XT-454560-5"">
                            <SUBLOCATION ID=""SFDF22D7"" NAME=""202743""/>
                            <SUBLOCATION ID=""S106B993E"" NAME=""401048""/>
                            <SUBLOCATION ID=""SDEA2907"" NAME=""507152""/>
                            <SUBLOCATION ID=""123C699"" NAME=""507180""/>
                            <SUBLOCATION ID=""HTY4C896"" NAME=""507205""/>
                            <SUBLOCATION ID=""SFD580DD"" NAME=""600281""/>
                        <LOCATION ID=""PD1104ED"" NAME=""TD-454560-4"">
                            <SUBLOCATION ID=""211704EF"" NAME=""202724""/>
                            <SUBLOCATION ID=""SFD37943"" NAME=""401056""/>
                            <SUBLOCATION ID=""XDEA2A2D"" NAME=""507169""/>
            foreach (XElement subLocation in companyInfo.Elements("CORPORATE").Elements("LOCATION").Elements("SUBLOCATION"))

If condition in Repeater,Listview

while binding data in repeater i need to do a if condition in the same repeater, so i use below one.

              <div id="Div1" runat="server" visible='<%#Eval("TextA") !="" %>'> //  true or false
                      <td style="width:120px;">
                       <asp:TextBox ID="TextBox1" Text='<%#Eval("AnimalGroup") %>' Width="100" runat="server"></asp:TextBox>                                          
                        <td style="width:100px;">
                       <asp:TextBox ID="txtQno" Text='<%#Eval("QNO") %>' Width="100" runat="server"></asp:TextBox>
                      <td style="width:500px;">
                         <asp:TextBox ID="txtTextA" Text='<%#Eval("TextA") %>' Width="500" runat="server"></asp:TextBox>                                          

Its working fine..... Thanks