asked on

Cross-Page Post Back problem

Hello,

I am simply trying to pull the information from one page to another. When I run my script I get this error:

Object reference not set to an instance of an object:
TextBox output = (TextBox)Page.PreviousPage.FindControl("companyBox");

Thats the error, the following is a portion of my code:

<%@ PreviousPageType VirtualPath="~/default.aspx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

public void submitButton_Click(object sender, EventArgs e)
{

TextBox output = (TextBox)Page.PreviousPage.FindControl("companyBox");
notesBox.Text = "Hello, " + output.Text;
}

</script>

Roopesh_7

I THINK ITS NOT POSSIBLE IN ASP.NET ... query string to get the values....

ASKER CERTIFIED SOLUTION

avanishp

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JasonWinn

ASKER

Hey Avanish,

Thank you for the reply.

I tried doing what you had but no go. First of all, it says .Value is invalid so I have been using .Text.

I am not getting any error messages, and notesBox.Text is displaying "Hello, " but it is not displaying hiddenCompany.Text's text.

any ideas? I will also include companyBox's code

statusNotifyMngment.aspx:

public void submitButton_Click(object sender, EventArgs e)
{
notesBox.Text = "Hello, " + hiddenCompany.Text;
}

protected void Page_Load(object sender, EventArgs e)
{
if (PreviousPage != null)
{
TextBox output = (TextBox)Page.PreviousPage.FindControl("companyBox");
//hidCompany hidden field to take previous page control value

hiddenCompany.Text = output.Text;
}

Default.Aspx:

<asp:TextBox ID="companyBox" runat="server" ></asp:TextBox>
<asp:Button ID="notifyButton" runat="server" Text="Notify" Width="74px" CssClass="button" PostBackUrl="~/statusNotifyMngment.aspx" />

JasonWinn

ASKER

Update:

I have changed around some things but still not working. Looking for any help possible.

My textbox is showing "Didnt work" when I run this. I am using public properties on the 1st page

Default.aspx

<script runat="server">

public String CurrentCompany
{
get
{
return companyBox.Text;
}
}

</script>

statusNotifyMngment.aspx: (page 2)

if (PreviousPage != null && PreviousPage.IsCrossPagePostBack)
{
notesBox.Text = PreviousPage.CurrentCompany.ToString();
}

else
{
// if previous Page is NULL just redirect us
notesBox.Text = "Didnt Work";

}

JasonWinn

ASKER

Small mistake, I did not mean to include ToString in the IF Statement. WIthout ToString() it still does not work