How to show excel report based on the entered textbox values in c#

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C#

Hai friends,

I have gridview control having title,incidentnumber,calendarcontrol with autogenerateselectbutton to true.If i click select link i am populating the selected rows values in a session and it is displaying in the "incident.aspx" page.It is having fields title,incidentnumber,calendarcontrol and button control.If i click submit button i want to show the excel report for the selected incident number from the sql table.Can anybody help me.
Below is the code.

 <table border="3" cellpadding="3" cellspacing="3" style="width:60%" align="center">
  <tr>
  <td align="right">
     <asp:Label ID="lblTitle" runat="server" Text="Title"></asp:Label>
  </td>
  <td>
  <asp:TextBox ID="txtTitle" runat="Server"  ></asp:TextBox>
  </td>
  </tr>
<tr>
                <td align="right">
                  
                    <asp:Label ID="lblIncidentNumber" runat="server" Text=" Incident Number :"></asp:Label>
                   
                </td>
                <td>
                    <asp:TextBox ID="txtIncidentNumber" runat="Server" onkeypress="return isNumberKey(event)" ></asp:TextBox>

                </td>
             
            </tr>
<tr>

<td  align="right">
                  
                  <asp:Label ID="lblStarttime" runat="server" Text=" Start time"></asp:Label>
</td>
<td>

                    
   
    
                     <asp:Calendar ID="StartCalendar" runat="server" 
                         ></asp:Calendar>
                     
                   
                     
                    
</td>
</tr>
  <asp:Button ID="Button2" runat="server" Text="Submit" 
        />

Thanks in advance