query string

Question

What is use of query string ? and how to use the query string? with Examples...

raghavendra p · Answer

hi query string is used maintain the state of application.for example we have two pages i need to transfer values from one page to another page then useful to use query string. In the firstpage: Query string code: Respone.redircet(secondpage.aspx?user='Textbox.text'); it will redirect to scecondpage.aspx and in the second page url u will get value what send u get in query string.u can send more than one value. now for accessing the value uses the following code: Request.Querystring[user].tostring(); if any queries revert back to me.

Satyapriya Nayak · Answer

Hi Rajkamal Query string is used to Pass the values or information form one page to another page. Syntax Request.QueryString(variable)[(index)|.Count] Parameters variable :- Specifies the name of the variable in the http query string to retrieve. index :- An optional parameter that enables you to retrieve one of multiple values for variable. It can be any integer value in the range 1 to Request.QueryString(variable).Count. Example In page one:- Partial Class _Default Inherits System.Web.UI.Page Protected Sub Button1_Click(ByVal sender As Object ByVal e As System.EventArgs) Handles Button1.Click 'bind the textbox values to querystring Response.Redirect(Default2.aspx?Textboxvalue= & TextBox1.Text) End Sub End Class In page two:- Partial Class Default2 Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object ByVal e As System.EventArgs) Handles Me.Load 'Get the values from Query string TextBox1.Text = Request.QueryString(Textboxvalue) End Sub End Class Thanks

Jignesh Trivedi · Answer

hi A query string is information that is appended to the end of a page URL. Example: http://localhost:300/default.aspx?id=1000 and you can retrieve it from serverside. var id = Request.QueryString[id]; Please refer http://www.codeproject.com/Articles/5876/Passing-variables-between-pages-using-QueryString hope this will help you.