First I have login form (Najava.aspx) who check the status :
if (Session["Status"].ToString() == "0")
{
Response.Redirect("Najava.aspx");
Label3.Text = "You waiting activation!";
}
With this I check if the user is not activated. I redirect again to the login form and I like in label to display text, but label don't display text after redirect?
One possibility is to set the text inside the Page_Load event of Najava.aspx. And if you need to display it only conditionally then you could pass a query string parameter when redirecting and then display the label only if this parameter is present:
if (Session["Status"].ToString() == "0")
{
Response.Redirect("Najava.aspx?waitingactivation=true");
}
and then inside the Page_Load event of Najava.aspx:
protected void Page_Load(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(Request["waitingactivation"]))
{
Label3.Text = "You waiting activation!";
}
}
Also you might consider using forms authentication.
Related
Hi i wanted to know if there is any way that i can reset my form after the data has been added successfully into the database? Like after showing some message to the client the textbox should automatically clear out.
What should I write in this block:
protected void Button1_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
Label2.ForeColor = System.Drawing.Color.DeepSkyBlue;
Label2.Text = "Master added successfully";
}
else
{
Label2.Text = "Master not added";
}
2 ways :
You can do it in server side :
TextBox.Text=string.Empty; (at PageLoad or PreRender). ( I'd choose Prerender cuz your form might use the old value...)
You can do it using javascript/jQuery :
$(function (){$("form")[0].reset()});
or this.form.reset()
1the source page has a page load method like below:
protected void Page_Load(object sender, EventArgs e)
{
TextBox1.Text = DateTime.Today.AddDays(1).ToShortDateString();
}
it will result a textbox1.text to display tomorrow's date when the source page is rendered. I have this source page cross post back to a target page, and in the target page load event i have
if (Page.PreviousPage != null && PreviousPage.IsCrossPagePostBack == true)
{
TextBox SourceTextBox1 = (TextBox)Page.PreviousPage.FindControl("TextBox1");
if (SourceTextBox1 != null)
{
Label1.Text = SourceTextBox1.Text;
}
}
the problem is if the user changes the content of textbox1, supposely, the label1 on target page should catch the user input and display it, but now it only displays whatever i set in the source page load event. I understand the self page post back life cycle, but this is cross page post back. IMO, the source page load event has nothing to do with this, but why it overrides the user input?? Any idea.
Just surround this with a if(!IsPostBack) check:
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
TextBox1.Text = DateTime.Today.AddDays(1).ToShortDateString();
}
}
Otherwise the value will be overwritten on every postback. So when you Server.Transfer it to the other page it is already changed.
I have a .aspx web page, with a html form within it, this also has two input boxes.
Whats the best way to take the input box data and pass it to a new .aspx page where it is dealt with by the request method.
Assuming that the data is not sensitive then the best method to pass it to your new page using Response.Redirect and the querystring using:
protected void MyFormSubmitButton_Click(Object sender, EventArgs e)
{
string value1 = txtValue1.Text;
string value2 = txtValue2.Text;
// create a querystring
string queryString = "x=" + value1 + "&y=" + value2;
// redirect to the encoded querystring
Response.Redirect("NewPage.aspx?" + Server.URLEncode(queryString));
}
This web page has a lot of information which you can use for passing the values from page to page.
http://msdn.microsoft.com/en-us/library/6c3yckfw.aspx#Y1100
Try Server.Transfer:
Terminates execution of the current
page and starts execution of a new
page by using the specified URL path
of the page. Specifies whether to
clear the QueryString and Form
collections.
If you set the preserveForm parameter
to true, the target page will be able
to access the view state of the
previous page by using the
PreviousPage property.
Your main page:
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
// ThreadAbortException occurs here.
// See http://support.microsoft.com/kb/312629 for more details.
Server.Transfer("AnotherPage.aspx", true);
}
}
"AnotherPage.aspx":
protected void Page_Load(object sender, EventArgs e)
{
if (PreviousPage != null)
{
// Accessing previous page's controls
}
}
am trying to get users to enter some details into a textbox in form1 and get the entry validated against the database. if the entry is correct, form2 loads with other texboxes including the one they made entries into. however i dont want them to make any changes to the textboxes they entered values into previously neither should they have to re-enter the values again.
how do i get the values in the textboxes to move from form1 to form2?
the code below shows what ive done with both forms but the second form dosent display the items in the textboxes when the form is loaded.
first form
protected void Button1_Click(object sender, EventArgs e)
{
string strConn;
strConn = "Provider=MIcrosoft.Jet.OLEDB.4.0;data Source=" +
Server.MapPath("App_Data/test.mdb");
OleDbConnection mDB = new OleDbConnection(strConn);
mDB.Open();
prodSnStr = pSnTextBox.Text;
purDate = Convert.ToDateTime(purDateTextBox.Text);
string dateStr = purDateTextBox.Text;
productClass aProduct = new productClass();
if (aProduct.Prods(mDB, prodSnStr, purDate))
{
Session["ProdSn"] = pSnTextBox.Text;
Session["PurDate"] = purDateTextBox.Text.ToString();
Response.Redirect("Warranty.aspx");
}
else
{
//error message
}
}
form two
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
if (Request.QueryString["ProdSn"] != "")
{
pSNoTextBox.Text = Request.QueryString["ProdSn"];
if (Request.QueryString["PurDate"] != "")
{
dateTextBox.Text = Request.QueryString["PurDate"];
}
else
{
//error message to display
}
}
else
{
//error message to display
}
}
eagaerly waiting for your responses..thanks..
In your code you are putting the values on one page into the session:
Session["ProdSn"] = pSnTextBox.Text;
Session["PurDate"] = purDateTextBox.Text.ToString();
However you are trying to read them out on the 2nd page from the Request collection:
if (Request.QueryString["ProdSn"] != "")
{
pSNoTextBox.Text = Request.QueryString["ProdSn"];
if (Request.QueryString["PurDate"] != "")
{
dateTextBox.Text = Request.QueryString["PurDate"];
}
This makes no sense. If you want to use the session, you must also get the values back out from the session object.
Personally I would look into Cross Page postbacks and Server.Transfer combined with Page.PreviousPage. Just make sure you don't set preserveForm parameter to false if using Server.Transfer.
You aren't passing your values as a query string. If you were your Response.Redirect would look like this:
Response.Redirect("Warranty.aspx?ProdSn=something&PurDate=something");
Instead since you are saving these values in a Session variable try this:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
if (Session["ProdSn"] != "")
{
pSNoTextBox.Text = Session["ProdSn"];
if (Session["PurDate"] != "")
{
dateTextBox.Text = Session["PurDate"];
}
else
{
//error message to display
}
}
else
{
//error message to display
}
}
In the button_click of the first form i entered this code
Session["ProdSn"] = pSnTextBox.Text;
Session["PurDate"] = purDateTextBox.Text.ToString();
Response.Redirect("Warranty.aspx?ProdSn=" + Server.UrlEncode(pSnTextBox.Text) +
"&PurDate=" + Server.UrlEncode(purDateTextBox.Text));
and then in the Page_load event of the second form i did this..
string value = Request["ProdSn"];
string value1 = Request["PurDate"];
pSnTextBox.Text = value;
purDateTextBox.Text = value1;
no hassle sustained....easy and perfectly working....
thank for ya'11 helping....
am very grateful
your asp.net page must post your data to second page.
just set your buttons PostBackUrl attribute.
<asp:Button ID="Button1" runat="server" Text="Button" PostBackUrl="target.aspx" />
I do not understand while you are making things complex.
When users clicks the button all data will be send to your target page.
Duplicate of Asp.Net Button Event on refresh fires again??? GUID?
hello, ive a website and when a user click a button and the page postback, if the user refresh the Page or hit F5 the button method is called again.
any one know some method to prevent page refresh with out redirect the page to the same page again ?
something like if (page.isRefresh) or something... or if exist any javascript solution is better.
this seen to works.... but when i refresh it does not postback but show the before value in the textbox
http://www.dotnetspider.com/resources/4040-IsPageRefresh-ASP-NET.aspx
private Boolean IsPageRefresh = false;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ViewState["postids"] = System.Guid.NewGuid().ToString();
Session["postid"] = ViewState["postids"].ToString();
TextBox1.Text = "Hi";
}
else
{
if (ViewState["postids"].ToString() != Session["postid"].ToString())
{
IsPageRefresh = true;
}
Session["postid"] = System.Guid.NewGuid().ToString();
ViewState["postids"] = Session["postid"];
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (!IsPageRefresh) // check that page is not refreshed by browser.
{
TextBox2.Text = TextBox1.Text + "#";
}
}
Thanks for comments and sorry for my mistake,
I found this code in:
http://www.codeproject.com/KB/aspnet/Detecting_Refresh.aspx
And this time tested ;)
private bool _refreshState;
private bool _isRefresh;
protected override void LoadViewState(object savedState)
{
object[] AllStates = (object[])savedState;
base.LoadViewState(AllStates[0]);
_refreshState = bool.Parse(AllStates[1].ToString());
_isRefresh = _refreshState == bool.Parse(Session["__ISREFRESH"].ToString());
}
protected override object SaveViewState()
{
Session["__ISREFRESH"] = _refreshState;
object[] AllStates = new object[2];
AllStates[0] = base.SaveViewState();
AllStates[1] = !(_refreshState);
return AllStates;
}
protected void btn_Click(object sender, EventArgs e)
{
if (!_isRefresh)
Response.Write(DateTime.Now.Millisecond.ToString());
}
You can test for the Page.IsPostBack property to see if the page is responding to an initial request or if it's handling a PostBack such as your button click event. Here's a bit more information: w3schools on IsPostBack
Unfortunately that's not going to solve your problem since IsPostBack will be true when the user clicks the button as well as when they refresh the page after the button action has taken place.
If you're doing a task like performing CRUD on some data, you can Response.Redirect the user back to the same page when you're done processing and get around this problem. It has the side benefit of reloading your content (assuming you added a record to the DB it would now show in the page...) and prevents the refresh problem behavior. The only caveat is they still resubmit the form by going back in their history.
Postbacks were a bad implementation choice for the Asp.net and generally are what ruin the Webforms platform for me.
This doesn't solve the problem.
First of all, storing a token in the view state is not a good idea, since it can be disabled. Use control state instead. Although, a HttpModule is a better solution.
All in all, this will not work anyway. If you open another tab/window the session will be invalid for the previous tab/window. Therefore braking it. You must somehow store a unique value each time a page is first loaded. Use that to determine where the request came from and then check the "refresh ticket". As you may see, the object for one user might get pretty big depending on the amount of requests made, where and how long you store this information.
I haven't seen any solution to this I'm afraid, as it is pretty complex.
bool IsPageRefresh ;
if (Page.IsPostBack)
{
if (ViewState["postid"].ToString() != Session["postid"].ToString())
IsPageRefresh = true;
}
Session["postid"] = System.Guid.NewGuid().ToString();
ViewState["postid"] = Session["postid"];
I tried many ways and I ended up looking for the form data sent when the postback / refresh is triggered... I found that there is a Key for any VIEWSTATE created and you can just compare those Keys like...
I put that on my custom basepage to reuse it like an Property
public bool IsPageRefresh = false;
protected void Page_Init(object sender, EventArgs e)
{
if (IsPostBack)
{
var rForm = Request.Form;
var vw = rForm["__EVENTVALIDATION"].ToString();
var svw = Session["__EVENTVALIDATION"] ?? "";
if (vw.Equals(svw)) IsPageRefresh = true;
Session["__EVENTVALIDATION"] = vw;
}
}