Hi I have a web app which has a listbox of all the available reports for a particular user. I want to open a new page 'ReportViewerPane' when a row is clicked and pass the report name and some parameters through to the reportviewer.aspx I then need to set the ReportViewer controls .reportpath to the correct (passed through) value and set the parameters values (also passed through).
I the moment I have this in the parent page. 'PassParmString' is a textbox on the main form:
function open_win()
{
var Parms = document.getElementById('<%=PassParmString.ClientID %>');
window.open("ViewerPane.aspx?prm=" + Parms,"_blank","left=20,top=20,width=1000,height=1140,toolbar=0,resizable=1");
}
</script>
but have no idea how to access the parameter 'Parms' that I pass once I am in in the ReportViewer.aspx form.
Please help.
I'm not good at this. And really trying to understand the posts so please be patient.
Many thanks
Mac
u are passing the element, and not its value, u can do something like this :
Parms = document.getElementById('PassParmString').value;
you can get it using regular request querystring collection in your ViewerPane.aspx page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
If NOT IsPostBack
If Not String.IsNullOrEmpty(Request.QueryString("prm"))
string querystringvalue = Request.QueryString("prm").ToString()
End If
End If
End Sub
try changing your javascript to this
<script>
function open_win()
{
var Parms = document.getElementById('<%=PassParmString.ClientID %>');
window.open("ViewerPane.aspx?prm=" + Parms.value,"_blank","left=20,top=20,width=1000,height=1140,toolbar=0,resizable=1");
}
</script>
See if this helps :)
Related
I create a dropdownlist in code behind with this:
Public sub CreateDDL()
Dim ddl As New DropDownList
Dim list As ListItem = New ListItem()
list.Text = "printTemplate1"
list.value = "~/template1.aspx"
ddl.Items.Add(list)
End Sub
I don't know how to put the value to be a link.
Suggest me, thanks.
I solve my problem at this way :
Public sub CreateDDL()
Dim ddl As New DropDownList
' ############# THE MODIFICATION ########################
ddl.Attributes.Add("onchange", "template1.aspx")
' ##################################################
Dim list As ListItem = New ListItem()
list.Text = "printTemplate1"
ddl.Items.Add(list)
End Sub
I hope it will be helpful to someone
What you are looking for is quite not possible because DropDownList render themselves into native HTML select. These controls aren't really designed to do such kind of activity.
In order to make them navigate to other page you need to combine them with client side script and make them behave as per your requirement. For E.g.
$(function() {
$("#<%=ddl.ClientID%>").change(function(e) {
var selectedUrl = $(this).val();
window.location.href = selectedUrl;
});
});
Also you can make use of ResolveURL() or ResolveClientUrl() to create a relative path to the root or relative to the current page respectively and then assign them to the ddl value.
list.value = ResolveUrl("~/template1.aspx");
/*or*/
list.value = ResolveClientUrl("~/template1.aspx");
I have an application in ASP.Net Ajax. I want to open it via a browsercontrol from a winform, and I wish to access a variable (username) that the user used to log in to the webform with. On load I would like to read that username and perform the rest of my webpage code on that browsercontrol using that username.
My ASP.Net Ajax has been published to a internal web server and the browsercontrol loads that IP address.
Is there any way to achieve this at all?
EDIT:
I have discovered the javascript extension: window.external
And I can call a C# procedure from the webpage using javascript with it, which is a start, but I need to retrieve a varaible from c# - this is where the problem comes in. I have tried the
var name = function window.external.GetGlobalVariable(MyGlobalProcedure, "Cannot Get Value");
But javascript error says the method cannot be applied to the object.
Your answer should be as follows:
Public Class Form1
Dim GlobalVar As String = "Your Name"
Dim YourBrowser As New WebBrowser
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
YourBrowser.Url = New Uri("Your URL address")
AddHandler YourBrowser.DocumentCompleted, AddressOf PageLoadComplete
End Sub
'The invokescript will only work once the HTML has finished loading itself into your WebBrowser
Sub PageLoadComplete()
'Must declare the string inside an array as the invokescript only allows an object to be sent
Dim VarToSend As String() = {GlobalVar}
YourBrowser.Document.InvokeScript("yourJavascriptfunction", VarToSend)
End Sub
The javascript section should look as follows:
<script type="text/javascript" language="javascript">
function userNameSet(name) {
$(document).ready(function() {
//variable now exists inside your WebBrowser client and can be used accordingly now
alert(name);
});
}
</script>
References for answer: http://www.dotnetcurry.com/showarticle.aspx?ID=194
"Store that name in a session variable and access the session in your ajax call"
In your ASP.Net application create a hidden field (or if it's somewhere on the UI in some control that works also). Put the username or whatever information you want to share into that field.
From your WinForms program you can request that field through the WebBrowser control like this:
MessageBox.Show(WebBrowser1.Document.GetElementById("txtUsername").GetAttribute("value"))
The above assumes you have some HTML element called txtUsername with the value attribute set.
I'm currently working on coding a web page for a school project. This site is supposed to be a simple online store where people can order prints of artwork. The specific page I'm working on has a Drop Down List (ddlArt) that is bound to my database and displays a list of the different art pieces available. When the user selects one of the items, all the information on that item is pulled from the database and displayed on the page in a variety of labels and such. The only thing is that I'm getting a null reference exception error saying "Object reference not set to an instance of an object" when I go to try to run the page. I got the same error on a homework assignment earlier in the year and managed to get it fixed, but I can't remember what I did and I can't get help from school until next week, so I thought I'd try my luck on here. Here's my code:
Private selectedArt As Art
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
ddlArt.DataBind()
End If
selectedArt = Me.GetSelectedArt
lblArtID.Text = selectedArt.ArtID()
lblArtName.Text = selectedArt.ArtName()
lblCaption.Text = selectedArt.Caption()
lblDescription.Text = selectedArt.Description()
imgArt.ImageUrl = "~/images/" & selectedArt.FileName()
End Sub
Private Function GetSelectedArt() As Art
Dim artTable As DataView = CType(SqlDataSource1.Select(DataSourceSelectArguments.Empty), DataView)
artTable.RowFilter = "ArtID = '" & ddlArt.SelectedValue & "'"
Dim artRow As DataRowView = artTable(0)
Me.imgArt.ImageUrl = "~/images/" & artRow("FileName")
Dim art As New Art
art.ArtID = artRow("ArtID").ToString
art.ArtName = artRow("ArtName").ToString
art.Caption = artRow("Caption").ToString
art.Description = artRow("LongDescription").ToString
art.FileName = artRow("FileName").ToString
Return art
End Function
And here's the code for the Art class, in case anybody is interested:
Public Class Art
Public Property ArtID As Integer
Public Property ArtName As String
Public Property ArtType As String
Public Property Caption As String
Public Property FileName As String
Public Property Description As String
End Class
When I get the error, it highlights the artTable.RowFilter = "ArtID = '" & ddlArt.SelectedValue & "'" line in the GetSelectedArt function. I've tried comparing it to my corrected homework assignment that I mentioned, but I can't seem to find the problem. My VB is a little fuzzy because it's been awhile since I actually took the class. Any suggestions? Thanks a bunch!
If I understand your comment above correctly, on the initial page load there is nothing in the ddlArt, because the user must first choose an art type.
If that is correct, then your answer to my question is your answer.
For whatever reason (and without seeing at least the Select statement), artTbl is not getting instantiated, which is why you're seeing the Object reference not set to an instance of an object error.
One way to fix this (without knowledge of your SqlDataSource it's hard to give a precise answer) is to modify your Page Load method so that GetSelectedArt is only called when the user has selected an item from the drop down list. Right now GetSelectedArt is called every time the page loads.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
ddlArt.DataBind()
Else
selectedArt = Me.GetSelectedArt
lblArtID.Text = selectedArt.ArtID()
lblArtName.Text = selectedArt.ArtName()
lblCaption.Text = selectedArt.Caption()
lblDescription.Text = selectedArt.Description()
imgArt.ImageUrl = "~/images/" & selectedArt.FileName()
End If
End Sub
However, the above modification will only prevent GetSelectedArt from being called on the initial page load. If your SqlDataSource.Select command is still returning nothing, then you're still going to have this problem.
A better solution would be to call the GetSelectedArt on the ddlArt.SelectedIndexChanged event handler. This way you'll know that you have (or should have) a valid SelectedValue from ddlArt.
Also, if you don't populate the drop down until the user selects an art type from the radio button list, why are you binding the drop down list on the initial page load (and what are you binding it to)? Or is the drop down list and detail information on a different page from the radio button list?
May be .. with ArtID as integer
artTable.RowFilter = "ArtID = " & format(ddlArt.SelectedValue)
I'm writing an ASP web application with VB back-end. What I'd like to do is generate a url and display this in control on the page. For example if I have a label and a button on the form. The label is blank. When the button is clicked the following code fires:
Protected Sub btnGenerate_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnGenerate.Click
label1.Text = "Hello"
End Sub
What I'd like to have is a url that would point to my ASP Page with the words "Hello" in the label. Is this possible?
You could do the following:
{siteaddress}/aspxpage.aspx?label=hello
then in you aspx page do something like:
<asp:label runat="server" id="yourLabelId" text='<%=Request.QueryString("label")%>' />
Or in the Page_Load:
yourLabelId.Text = Request.QueryString("label")
I would recommend validating the data before just writing it into the page.
Pass the text in query string e.g. suppose relative path of the page is /pagename.aspx , you can pass the query string as per given example below:
/pagename.aspx?text=hello
in c# write following code in Page_Load event
//You don't have to check the url all the time , so just check it if page is not posting back (first time after user visits the page and ignore all other same page post backs. Label can maintain its control state (text value) after every postback, so assign it only once to increase performance
if (!IsPostBack)
{
//Check if query string is provided or not , if it is not provided take some default text, I am taking empty string as default text.
string givenText = (Request.QueryString["text"] == null)?"":Request.QueryString["text"];
label1.Text = givenText;
}
You can also create a property for text given through query string and default text.
I have been struggling with getting FormViews to work the way Microsoft expects me to for about a day and have figure a bunch of great stuff out.
I can catch e.Exception and e.ReturnValue in the ObjectDataSource.Inserting Event Handler and I can even cheat and check other properties of the Object in the ObjectDataSource.ObjectDisposing by checking the e.ObjectInstance ... and I even learned that FormView's Inserting Handler Runs AFTER the ObjectDisposing Handler so If there is a problem found I still have time to react to it and st the e.KeepInInsertMode to true on the FormView.
My problem is, it seems that the values entered by the user into the Insert form are cleared regardless.
So, How do I Prevent a FormView from clearing after it's Insert Method has fired?
(Using ASP.NET + VB)
I don't think posting my code here will really do much good and i would have to modify it to trim out confidential business logic stuff... so I'll skip it for now.
edit:
I have found a temporary and admittedly terribly cludgy solution (in case no one ever finds a REAL solution to the problem).
I have a page variable defined as:
Dim eInsertArgs As FormViewInsertedEventArgs
And then I do the following in my ItemInserted handler
If boolInsertErrorOccurred = False Then
e.KeepInInsertMode = True
eInsertArgs = e
Else
eInsertArgs = Nothing
End If
Then on each of the controls I have something like this in that controls databinding event:
If IsNothing(eInsertArgs) = False Then
Dim _sender As TextBox = sender
_sender.Text = eInsertArgs.Values("_FieldName")
End If
The effect of this is that I am setting the values BACK to the submitted values AFTER ASP.NET binds the FormView to the default (blank) Template.
Please help me find a less terrible solution. :)
You need to create your own server control which inherits from the FormView control.
Public Class MyFormView
Inherits FormView
Protected Overrides Sub OnDataSourceViewChanged(ByVal sender As Object,
ByVal e As EventArgs)
If (MyBase.CurrentMode = FormViewMode.Insert) Then
MyBase.RequiresDataBinding = False
Else
MyBase.OnDataSourceViewChanged(sender, e)
End If
End Sub
End Class
Please take a look at this page: http://www.dotnetmonster.com/Uwe/Forum.aspx/asp-net/76885/FormView-Insert