how to insert value into table using c#

For adding control in table you can do somthing like this In HTML

<table id="test"  runat="server">

and in code behind>.For Example i am adding text box in table

TextBox text = new TextBox();
          test.Controls.Add(text);

And just for adding item in dropdown you can do somthing like this

''' adds a row to a drop down menu. In old code line no  62 to 78
   '''
   ''' <param name="dropDown"></param>
   ''' <param name="text"></param>
   ''' <param name="value"></param>
   ''' <remarks></remarks>
   Sub addDropDownItem(ByVal dropDown As DropDownList, ByVal text As String, ByVal value As String)
       Dim dropDownItem As New ListItem
       dropDownItem.Text = text.ToString()
       dropDownItem.Value = value.ToString()
       dropDown.Items.Add(dropDownItem)
       dropDown.DataBind()
   End Sub

http://msdn.microsoft.com/en-us/library/dw70f090.aspx[^]

Try
MSDN-[How to: Insert New Records into a Database][^]