Binding Url to Gridview - asp.net

Question

I want to bind the url to GridView but I don't know how.
For example when I type the http://localhost:12345/example.aspx?FirstName=John in the url it will give me the result in GridView that shows only with the FirstName "John".
Here's my curent code:
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
Dim dt As New DataTable
' Stablish ODBC Connection
Dim con As New OdbcConnection("DRIVER={SQL Server};Server=WJNJPHR8TCX8P\SQLEXPRESS;Database=Fabrics;Integrated Security=True;")
' Query Command
Dim cmd As New OdbcCommand("SELECT * FROM [Client] WHERE [FirstName] = ?", con)
con.Open()
' Gets the path (Example.aspx)
Dim path As String = HttpContext.Current.Request.Url.AbsolutePath
' Gets the host (localhost)
Dim host As String = HttpContext.Current.Request.Url.Host
' Gets the whole url (localhost:24124/Example.aspx)
Dim url As String = HttpContext.Current.Request.Url.AbsoluteUri
' Parse the query string variables into a NameValueCollection
Dim qscoll As NameValueCollection = HttpUtility.ParseQueryString(url)
' Iterate through the collection and shows the result in MsgBox
Dim sb As New StringBuilder()
For Each s As String In qscoll.AllKeys
sb.Append(s & " = " & qscoll(s) & vbCrLf)
Next s
MsgBox(sb.ToString)
' Gets all keys and values in query string and shows it on MsgBox
For Each key As String In HttpContext.Current.Request.QueryString.AllKeys
MsgBox("Key: " + key + " Value: " + Request.QueryString(key))
Next key
Dim FName As String = Request.QueryString("FirstName")
Dim par1 As New OdbcParameter
par1.OdbcType = OdbcType.NVarChar
par1.Value = FName
par1.ParameterName = "#FirtName"
cmd.Parameters.Add(par1)
'Shows the result in Data Grid
dt.Load(cmd.ExecuteReader()) '==> Error: Invalid use of default parameter
GridView1.DataSource = dt
GridView1.DataBind()
End Sub
Any help will do!

Answer 1

You can access your query string directly with
Dim firstName as string = Request.QueryString("firstName")
Then you must pass it as a parameter of the query before executing it
Dim par1 As New OdbcParameter
par1.DbType = DbType.String
par1.Value = firstName
par1.ParameterName = "#FirstName"
cmd.Parameters(1) = par1
Hope it helps

Answer 2

Answered my question!
Here's my code:
For Each key As String In HttpContext.Current.Request.QueryString.AllKeys
Dim FName As String = Request.QueryString("FirstName")
Dim par1 As New OdbcParameter With {
.OdbcType = OdbcType.NVarChar,
.Value = FName,
.ParameterName = "#FirstName"
}
cmd.Parameters.Add(par1)
MsgBox("Key: " + key + " Value: " + Request.QueryString(key))
dt.Load(cmd.ExecuteReader())
GridView1.DataSource = dt
GridView1.DataBind()
Next key
#isol Thanks for your help! :)