Incorrect syntax near 'Implementation'

Question

my UI

 

"My moto click any link open pdf file in new window but i want not use query string for security purpose" 

 

 

my aspx .code

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"

GridLines="None" Width="900px" CssClass="gridview" DataKeyNames="idno"

HeaderStyle-CssClass="header" RowStyle-CssClass="rows"

onrowdatabound="GridView1_RowDataBound">

<Columns>

<asp:TemplateField HeaderStyle-Width="10px">

<ItemTemplate>

<%#Container.DataItemIndex+1 %>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="?????">

<ItemTemplate>

<asp:HyperLink ID="bnv" runat="server" ToolTip='<%# string.Format("{0}=>[{1}]",Eval("link_level3"),Eval("url")) %>' CssClass="raj " Width="100%" Target="_New" Text='<%# Eval("link_level3") %>'></asp:HyperLink>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

 

 

cs code on row databound

{

string filepath = "WriteReadData/documents/";

if (e.Row.RowType == DataControlRowType.DataRow)

{

HyperLink hl = (HyperLink)e.Row.FindControl("bnv");

if (hl != null)

{

DataRowView drv = (DataRowView)e.Row.DataItem;

Session["id"] = drv["idno"].ToString();

//string lsDataKeyValue = GridView1.DataKeys[e.Row.RowIndex].Values[0].ToString();

SqlConnection con = new SqlConnection(str);

string query = "select filename from level3 where link_level3='" + hl.Text + "' ";

SqlCommand cmd = new SqlCommand(query,con);

con.Open();

string file_name = (string)cmd.ExecuteScalar();

con.Close();

if (file_name != null)

{

hl.NavigateUrl = filepath + file_name;

}

}

}

}

 

Error generate on page load  

 

 

 

how to solves this please guid me

 

 

Thanks