On the page load event of my webpage i fill the list of with the contents of the structure
Structure MainStruct
Dim Ans1 As String
Dim Ans2 As String
End Structure
Dim Build As New List(Of MainStruct)
The problem i that on post-back the contents of the list-of get lost.So, how can i preserve the contents of the list-of in ASP.NET?
I have an xml file as shown below. In that the MailBody has contents stored in tabular form. In that table I have a column 'Description' which needs to preserve line breaks and paragraph format if user input is in paragraphs.
At present that column displays data as one whole paragraph even if user enters data with line breaks by Enter key.
[Code]....
I have a dropdown list with a piece of code that is run when the value is changed:
<select name="SList" onchange="javascript:setTimeout('__doPostBack('SList','')', 0)" id="SList">
Everything works fine when manually done. As an option is selected, the onchange code is called.
The problem begins when I try to change the selected value using a piece of Javscript. I want to be able to automatically change the selected option using JS, whilst still having the onchange code called, exactly as if done manually.
I try calling this:
form.SList.value = "33";
The right option is selected, but the onchange code does not get called. So then I try doing this:
form.SList.value = "33";
javascript:setTimeout('__doPostBack('SList','')', 0);
The right value is not selected and nothing happens.
FYI, the code is done in ASP.NET and Javascript.
What can I run to change the selected option whilst still calling the onchange code?
Here is what is in my code-behind:
List<Event> events = new List<Event>();
protected void Page_Load(object sender, EventArgs e)
{
}
protected void AddEvent_Click(object sender, EventArgs e)
{
Event ev = new Event();
ev.Name = txtName.Text;
events.Add(ev);
}
I want to add an item to the list every time the Add button is clicked, but the list is reset after every postback. How can I keep the data in the list between postbacks?
how can DropDownList attributes be persisted accross page Postbacks?
Example:
DropdownList1.AutoPostBack = True
DropdownList1.items(0).Attributes.Add("Attribute1","somevalue")
On Postback the attribute is no longer available (ie. attributes.count=0).
I tried persisting using the code below, but was unsuccessful:
Before PostBack: ViewState.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = ViewState("DDL")
This generated the error: DropDownlist is not marked as serializable.
I than tried:
Before PostBack: Session.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = Session("DDL")
This did not err but attributes were still not available.
When programming web pages with VB, what is the easiest way to view the contents in a list (to confirm some code is working)?
A textbox on the page?
I have been told 'they' want to be able to see the documents on Drive:H
Is this doable from within a web application project?
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now my problem is that i need to preserve the order of the list items after postback.
the code is as shown below:
controller code:
public ActionResult Create()
{
CreateFormModel model = new CreateFormModel();
return View(model);
}
[code]....
I wrote the following code to preserve the values of a dynamic array
but the 2nd time around I get the 'ReDim' can only change the rightmost dimension.
Here is the code ...how should I modify it? Initial lead_count value is 0
[Code]....
I want to preserve the dynamically created control when postback occurs .
protected void Page_Load(object sender, EventArgs e)
{
} It can be achieved by calling CreateTable() in Page_Load. Is there any alternative way to preserve the control
[code]....
I really have a big problem(stuck) with two dropdownlists inside a detailsview.I have 4 detailsview : DdlRt,DdlRt2,ddlMobv1,ddlMobv2. Basically what happens here is that DdlRt2 gets populated when DdlRt is selected and ddlMobv2 gets populated when a specific value from ddlMobv1 is selected.
In code posted above the detailsview has a "Update" command and the problem is when the update command is executed the data is successfully posted to the db BUT! THE VALUES from DdlRt2 and ddlMobv2 dissapear! And I can't insert any more Items. The only Item that stays in these two dropdownlists is the default "Select Department" item which is't set in codebehind but is set in .aspx.....I can't figure what I'm doing wrong here It must be something with databinding & events.
So my question is "Why can't I insert any more items to these two dropdownlists after the "Update" command on the DetailsView is set or how can I preserve the values that are already in"?
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataSourceID="odsRegister"
DefaultMode="Edit" Height="50px" Width="125px" > [code]....
I have a multiline textbox whose .Text property get saved in an SQL 2008 DB. When I submit the textbox, I loose the returns. How do I handle this?
I've used Enviroment.Newline() to do some html conversion stuff, but I've never ran into this specific problem.
Edit: Nevermind, it was working just fine, but I was replacing " " incorrectly. Stupid mistake. I have to convert the " " to <p> tags. I've done this before, but if anybody wants to answer, I'll mark their answer as correct.
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Page.ClientScript.RegisterClientScriptInclude("myKey",
"https://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6.2&s=1")
This results in the following HTML:
<script
src="https://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6.2&s=1"
type="text/javascript"></script>
But what I really want is:
<script
src="https://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6.2&s=1"
type="text/javascript"></script>
I have an application with different sections. Each section is accessed through a domain. Example:
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I am trying to figure out how to preserve the values of the controls on this page (just the user-submitted commission value and the sales region (eastern is 10% and western is 20%)).
The code is as follows:
<form id='frmShowCommSingleDocKeepState' action='afShowCommSingleDocKeepState.aspx' method='get' >
<div>
<%
Dim strSale As String
Dim dblSale As Double
Dim strRegion As String
Dim dblComm As Double
Dim E As Double = 0.1
Dim W As Double = 0.2........
I have a form, mostly consisting DDL's. I constructed this form using a Master page with about 10 different pages attached. Each page consists of roughly 10 to 20 DDL's. My goal now is to navigate from one page to the next and back with out loosing the selected values in each of my DDL's on each page. I have thought about assigning each to a Session but that would really bog things down considering the amount of Data i would be storing. I would love to go the easiest route but my mission here is most efficient.
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Function CSV2DataTable(ByVal filename As String, ByVal sepChar As String) As DataTable
Dim reader As System.IO.StreamReader
Dim table As New DataTable
Dim colAdded As Boolean = False
Try
''# open a reader for the input file, and read line by line
reader = New System.IO.StreamReader(filename)
Do While reader.Peek() >= 0
''# read a line and split it into tokens, divided by the specified
''# separators
Dim tokens As String() = System.Text.RegularExpressions.Regex.Split _
(reader.ReadLine(), sepChar)
''# add the columns if this is the first line
If Not colAdded Then
For Each token As String In tokens
table.Columns.Add(token)
Next
colAdded = True
Else
''# create a new empty row
Dim row As DataRow = table.NewRow()
''# fill the new row with the token extracted from the current
''# line
For i As Integer = 0 To table.Columns.Count - 1
row(i) = tokens(i)
Next
''# add the row to the DataTable
table.Rows.Add(row)
End If
Loop
Return table
Finally
If Not reader Is Nothing Then reader.Close()
End Try
End Function