Navigate to previous page in Asp.net

There are various ways using which you can navigate back to the previous page. To keep the example short and simple, I will be using two pages and a few buttons to demonstrate the navigation. So let us get started:

Step 1: Create an ASP.NET Project with two pages, Page1.aspx and Page2.aspx.

Step 2: On Page1.aspx, drag and drop a button control. In the click event, use this code:

protected void Button1_Click(object sender, EventArgs e)

{

Response.Redirect("Page2.aspx");

}

Step 3: On Page2.aspx, we will be dragging and dropping 3 buttons. Each button will represent a method to go back to the previous page. Let us explore them one at a time:

Method 1 – Using a static variable and UrlReferrer

URLReferrer gets the URL of the previous page that linked to the current URL. To use this property, declare a static variable called ‘prevPage’ in Page2.aspx. Drag and drop a button, button1 on Page2.aspx. On the Page_Load, use the Request.UrlReferrer to populate the prevPage variable with its value. Then on the button1 click event, use this variable to go back to the previous page as demonstrated below :

// static variable

static string prevPage = String.Empty;

protected void Page_Load(object sender, EventArgs e)

{

if( !IsPostBack )

{

prevPage = Request.UrlReferrer.ToString();

}

}

protected void Button1_Click(object sender, EventArgs e)

{

Response.Redirect(prevPage);

}

Method 2 – Using Javascript

Drag and drop another button called button2 on the Page2.aspx. In the Page_Load event, add the following lines of code :

protected void Page_Load(object sender, EventArgs e)

{

Button2.Attributes.Add("onClick", "javascript:history.back(); return false;");

}

protected void Button2_Click(object sender, EventArgs e)

{

}

 

Note : Notice the ‘return false’ snippet used in the Button2.Attributes.Add method. Well this is used to cancel the submit behaviour that occurs on the button click. Since the Click event precedes over the other events, we need to return false to cancel the submit and go back to the previous page.

 

Method 3 – Using ViewState

If you do not intend to declare a static variable, you can use viewstate to go back to the previous page by using the same UrlReferrer property that we used in Method 1. To do so, drag and drop a third button, Button3 on Page2.aspx. In the Page_Load event, use the ViewState to store the value of the Request.UrlReferrer property. Then access the same value in the click event of the third button to go back to the previous page as shown below:

protected void Page_Load(object sender, EventArgs e)

{

if( !IsPostBack )

{

ViewState["RefUrl"] = Request.UrlReferrer.ToString();

}

}

protected void Button3_Click(object sender, EventArgs e)

{

object refUrl = ViewState["RefUrl"];

if (refUrl != null)

Response.Redirect((string)refUrl);

}