I have a list of strings, which are generated on a imagebutton_click method. I want to be able to use this list in another webpage.
How ever im not quite sure how to go about posting it between the two pages.
I have the following code below:
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
RadGrid rg = RadGrid1;
//Get selected rows
GridItemCollection gdc = (GridItemCollection)rg.SelectedItems;
foreach (GridItem gi in gdc)
{
if (gi is GridDataItem)
{
GridDataItem gdi = (GridDataItem)gi;
if (!string.IsNullOrEmpty(gdi["Email"].Text))
{
string client = gdi["Email"].Text;
//Creating a List of Clients to be Emailed
emailList.Add(email);
}
}
//Enable the Prepare Email Page
PageView2.Selected = true;
}
protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
{
if (emailList.Count != 0)
{
for (int i = 0; i < emailList.Count; i++)
{
_to = emailList[i].ToString() + ";";
}
}
else
{
_to = emailList[1].ToString();
}
//Processing Client Email
string _from = sec.GetCurrentUserEmail("test");
string _cc = "";
string _subject = SubjectTB.Text;
string _body = EmailEditor.Content;
string _tempTo = sec.GetCurrentUserEmail("temp");
string _msg = sec.SendMail(_tempTo, _cc, _from, _subject, _body, "");
if (_msg == "success")
{
//Thank the user and record mail was delivered sucessfully
TestPanel.Visible = true;
}
}
How do I get the values of emailList to be passed through to ImageButton2_click(object sender, ImageClickEventArgs e). Currently it just passes through a null value. I gather I need to use HTML forms to do the request. Thanks.
I'm guessing that emailList is a private variable? Wouldn't you be able to add that to the LoadControlState and SaveControlState so that it'll be available for ImageButton2_Click later?
Here is an example: http://msdn.microsoft.com/en-us/library/system.web.ui.control.loadcontrolstate%28v=vs.80%29.aspx
Another possibility is hidden field, that might be the simplist way, but not as secure.
You can get a good idea about state management in ASP.Net here. For your case if button1 and button2 are in the same aspx page, Viewstate would be a good idea. If they are in diferent pages then use Session state management.
Related
For hands on experience, I am generating random numbers and compare their sums on submission, but every time, I press button, random numbers are changing, How can I stop happening this? I considered different experiments, but not able to do that.
Here is my class code for random numbers:
public class Captcha
{
int num1, num2, total;
public int N1
{
get
{
return num1;
}
}
public int N2
{
get
{
return num2;
}
}
public int Total
{
get
{
return total;
}
}
Random r = new Random();
public Captcha()
{
Random r = new Random();
num1 = r.Next(1, 11) * 10;
num2 = r.Next(1, 11);
total = num1 + num2;
}
}
Now, I am using this one on Page_Load event like this :
Captcha c = new Captcha();
protected void Page_Load(object sender, EventArgs e)
{
Label2.Text = c.N1.ToString();
Label3.Text = c.N2.ToString();
}
How can I accomplished this one?
Thanks.
Since you are creating object of Captcha outside the Page Load event, it will get re-created whenever a call to the page happens.
You might be aware that internet is state-less so whenever there is a call to the Page, a new page gets generated, and hence new Captcha object. So you need to maintain the Captcha object in some state management like view state.
Your code should be something like this.
Captcha c;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
c = new Captcha();
Label2.Text = c.N1.ToString();
Label3.Text = c.N2.ToString();
ViewState["c"] = c;
}
}
Then on button click you need to type cast the viewstate back to "c". Something like this.
//button click
c = (Captcha)ViewState["c"];
if(TextBox1.Text.Equals......)
Maybe you need to mark your Captcha class as serializable as it might throw error.
I hope this will help.
Regards,
Samar
I have a GridView and on its SelectedIndexChanged the code is fired:
protected void grdEntry_SelectedIndexChanged(object sender, EventArgs e)
{
lblAssignId.Text = grdEntry.SelectedRow.Cells[1].Text == " "
? ""
: grdEntry.SelectedRow.Cells[1].Text;
Ob.BranchId = Globals.BranchID;
Ob.AssignId = lblAssignId.Text;
DataSet dsMain = GetAssignDetails(Ob);
if (dsMain.Tables[0].Rows.Count != 0)
{
// some other code
Task.Factory.StartNew(() => FillMemberShipAndBarCode(dsMain.Tables[0].Rows[0]["CustomerCode"].ToString(), Ob.BranchId));
}
}
and the code for filling membership id is
private void FillMemberShipAndBarCode(string customerCode, string branchId)
{
var sqlCommand = new SqlCommand
{
CommandText = "sp_customermaster",
CommandType = CommandType.StoredProcedure
};
sqlCommand.Parameters.AddWithValue("#CustomerCode", customerCode);
sqlCommand.Parameters.AddWithValue("#BranchId", branchId);
sqlCommand.Parameters.AddWithValue("#Flag", 18);
var data = PrjClass.GetData(sqlCommand);
txtMemberShip.Text = data.Tables[0].Rows[0]["MembershipId"].ToString();
txtBarCode.Text = data.Tables[0].Rows[0]["Barcode"].ToString();
}
It's working fine, but is is not updating any of the textboxes. Also, I checked in watch window, the values are returned as expected (M-1213 and 634-98-4 ) and the code does reaches the point txtMemberShip.Text = data.Tables[0].Rows[0]["MembershipId"].ToString();
but the txtMemberShip just remains empty??? Can anyone tell me why is not updating the textboxes?
UPDATE
As per comments, here is the page load
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindDropDown();
BindGrid();
SetDefaultsInTextBoxes();
}
}
And I don't have any code that waits on this task.
Don't do this:
Task.Factory.StartNew(() => FillMemberShipAndBarCode(dsMain.Tables[0].Rows[0]["CustomerCode"].ToString(), Ob.BranchId));
What are you trying to achieve by doing so?
What is probably happening is your method FillMemberShipAndBarCode is probably running after ASP.NET has already sent the page back to the browser. Thus, essentially, no visible effect on the rendered HTML.
ASP.NET isn't a good place to do multi-threaded stuff.
Try just replacing the above with this:
FillMemberShipAndBarCode(dsMain.Tables[0].Rows[0]["CustomerCode"].ToString(), Ob.BranchId);
namespace Dynamic_Controls.Dropdowndynamic
{
public partial class DropdowndynamicUserControl : UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
if (ControlCount != 0)
{
Recreatecontrols();
}
}
private void Recreatecontrols()
{
// createtextboxes(ControlCount);
createtextboxes(2);
}
protected void createtextboxes(int ControlCount)
{
DynPanel.Visible = true;
for (int i = 0; i <= ControlCount; i++)
{
TextBox tb = new TextBox();
tb.Width = 150;
tb.Height = 18;
tb.TextMode = TextBoxMode.SingleLine;
tb.ID = "TextBoxID" + this.DynPanel.Controls.Count;
tb.Text = "EnterTitle" + this.DynPanel.Controls.Count;
tb.Load+=new EventHandler(tb_Load);
tb.Visible = true;
tb.EnableViewState = true;
DynPanel.Controls.Add(tb);
DynPanel.Controls.Add(new LiteralControl("<br/>"));
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
Int32 newControlCount = Int32.Parse(DropDownList1.SelectedValue);
//createtextboxes(newControlCount);
//ControlCount+=newControlCount;
createtextboxes(2);
}
protected void Button1_Click(object sender, EventArgs e)
{
readtextboxes();
}
public void readtextboxes()
{
string x = string.Empty;
for (int a = 0; a < DynPanel.Controls.Count; a++)
{
foreach (Control ctrl in DynPanel.Controls)
{
if (ctrl is TextBox)
{
x = ((TextBox)ctrl).Text;
}
x+=x+("\n");
}
Result.Text = x;
}
}
private Int32 ControlCount
{
get
{
if (ViewState["ControlCount"] == null)
{
ViewState["ControlCount"] = 0;
}
return (Int32)ViewState["ControlCount"];
}
set
{
// ViewState["ControlCount"] = value;
ViewState["ControlCount"] = 2;
}
}
private void tb_Load(object sender, EventArgs e)
{
LblInfo.Text = ((TextBox)sender).ID + "entered";
}
}
}
Are you adding these controls dynamically in Page_Load (by, I'm assuming, calling your AddRequiredControl() method)? If so, is it wrapped in a conditional which checks for IsPostBack? The likely culprit is that you're destructively re-populating the page with controls before you get to the button click handler, so all the controls would be present but empty (as in an initial load of the page).
Also, just a note, if you're storing each control in _txt in your loop, why not refer to that variable instead of re-casting on each line. The code in your loop seems to be doing a lot of work for little return.
You need to recreate any dynamically created controls on or before Page_Load or they won't contain postback data.
I'm not entirely clear what happens on DropdownList changed - are you trying to preserve anything that has been entered already based on the textboxes previously generated?
In any event (no pun intended) you need to recreate exactly the same textboxes in or before Page_Load that were there present on the postback, or there won't be data.
A typical way to do this is save something in ViewState that your code can use to figure out what to recreate - e.g. the previous value of the DropDownList. Override LoadViewState and call the creation code there in order to capture the needed value, create the textboxes, then in the DropDownList change event, remove any controls that may have been created in LoadViewState (after of course dealing with their data) and recreate them based on the new value.
edit - i can't figure out how your code works now, you have AddRequiredControl with parameters but you call it with none. Let's assume you have a function AddRequiredControls that creates all textboxes for a given DropDownList1 value, and has this signature:
void AddRequiredControls(int index)
Let's also assume you have a PlaceHolder called ControlsPlaceholder that will contain the textboxes. Here's some pseudocode:
override void LoadViewState(..) {
base.LoadViewState(..);
if (ViewState["oldDropDownIndex"]!=null) {
AddRequiredControls((int)ViewState["oldDropDownIndex"]);
}
}
override OnLoad(EventArgs e)
{
// process data from textboxes
}
void DropDownList1_SelectedIndexChanged(..) {
ControlsPlaceholder.Controls.Clear();
AddRequiredControls(DropDownList1.SelectedIndex);
ViewState["oldDropDownIndex"]=DropDownList1.SelectedIndex;
}
Back in the ASP classic days when i needed to write out the name/value pairs of forms submitted by POST i thru this loop into the page:
on error resume next
for each x in Request.Form
Response.AppendToLog x & "=" & Request(x)
next
It threw all the form fields and values into the log just as GETs are. Does IIS7 .net give me any better method? (this is for the dev/testing portion of the project i don't have any concern about the space or cycles used to accomplish this).
thx
You can create an http module to log all posts. It allows you to log outside of the pages, a single point of logging instead of having to add the logic to all pages where you want to log activity.
Here you have some of the code. You would have to avoid logging viewstate since is tons of useless information. So you have to add some logic to achieve this.
public class ActivityLogModule: IHttpModule
{
public void Init(HttpApplication application)
{
application.EndRequest += (new EventHandler(this.Application_EndRequest));
}
private void Application_EndRequest(Object source, EventArgs e)
{
HttpApplication application = (HttpApplication)source;
HttpContext context = application.Context;
if (RecordActivity(context))
{
ActivityLogger.Instance.Log(application.Context.User.Identity.Name,
application.Context.Request.Url.AbsoluteUri,
application.Context.Request.Form.ToString());
}
}
public void Dispose(){}
protected bool RecordActivity(HttpContext context)
{
if (!context.Request.RequestType.Equals("POST"))
{
return false;
}
return true;
}
}
You could have something like this:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
LogPostValues();
}
private void LogPostValues()
{
string logPath = #"C:\PostedValuesLog.txt";
StringBuilder sb = new StringBuilder();
sb.AppendFormat("Logging: {0}", Request.Path);
sb.Append("Form Values");
foreach (string key in Request.Form)
{
string val = Request.Form[key];
sb.AppendFormat("{0} = {1}<br/>", key, val);
}
sb.Append(Environment.NewLine);
sb.Append("QueryString Values");
foreach (string key in Request.QueryString)
{
string val = Request.QueryString[key];
sb.AppendFormat("{0} = {1}<br/>", key, val);
}
sb.Append(Environment.NewLine);
sb.Append(Environment.NewLine);
sb.Append(Environment.NewLine);
File.AppendAllText(logPath, sb.ToString());
}
This is a crude method though and shouldn't really be used in production code. However, as this is just for development & testing, it should suffice to track what data is being posted to your page via the querystring and form.
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.