I have the need to display a date in this format: dd/mm/yyyy. This is actually being stored in an ASP.NET textbox and being used as a control parameter for a select on the GridView. When the query is run, though, the date format should change to 'd M y' (for Oracle). It is not working. Can someone tell me what I'm doing wrong? Right now I am pushing the "new" format to a invisible label and using the label as my control param:
$(document).ready(function() {
//datepicker for query, shown traditionally but holding an Oracle-needed format
$('[id$=txtBeginDate]').datepicker({ minDate: -7 , altFormat: 'd M y' });
//get alt format
var altFormat = $('[id$=txtBeginDate]').datepicker("option", "altFormat");
//set date to be altformat
$('[id$=lblActualDate]').datepicker("option", "altFormat", 'd M y');
});
why not do the formatting on the server-side when building your Oracle query?
System.DateTime dt = DateTime.Parse(txtBeginDate.Text);
dt.ToString("dd MM yyyy")
SqlDataSource can only use server-side asp.net controls for ControlParameters. To use your jQuery datepicker, you'll have to get a little fancy.
Put a plain Parameter and then handle the SqlDataSource's Selecting event to set the value for the parameter from the Request object (with suitable validation and formatting) by hand.
Related
I am trying to filter a table using a DateBox. The problem I have is that it doesn't display the records of that day when binding value is set to #datasource.query.filters.date._equals. However, it does work when the filter is _greaterThanOrEquals, but it also includes later records.
I am using SQL tables with date field type is DATE.
It's a bug. We're looking into it.
For now please use workaround:
Remove the binding and set 2 filters in onValueEdit event with code like:
widget.datasource.query.filters.FIELD_NAME._greaterThanOrEquals = newValue;
widget.datasource.query.filters.FIELD_NAME._lessThanOrEquals = newValue ? new Date(newValue.getTime() + 24*60*60*1000) : null;
widget.datasource.load();
bind DateBox value to
#datasource.query.filters.NameOfDateFiled._equals
and don't forget reload datasource in "onValueChange" event.
Saving the values in the Lists & works fine.
abc= (ABC)(Session["xml"]);
string ctrlStr = String.Empty;
foreach (string ctl in Page.Request.Form)
{
if (ctl.Contains("something"))
{
ctrlStr = ctl.ToString();
abc.student[0].marks[j].science.something.Value = Convert.ToDecimal(Request.Form[ctrlStr]);
}
Want to retrieve the values from the saved object when I click on edit button back on the respective dynamic textboxes....
foreach (string ctl in Page.Request.Form)
{
if (ctl.Contains("studentname"))
{
ctrlStr = ctl.ToString();
(Request.Form[ctrlStr]) = abc.student[0].marks[x].science.studentname.ToString();---Gives an error stating the collection is only readonly
}
}
Request.Form — like the Request object generally — is read-only, reflecting the fact that, by the time you are responding to a request, the request itself cannot be changed. ASP.NET uses the values from the form POST to create server controls on the Page, and these allow you to control the values of the input and other form elements that are written to the Response object.
In your case, the TextBox controls are being generated dynamically, so they are not automatically bound to form values — hence your problem. You will need to keep references to the controls when they are created (or find them afterwards using the FindControl() method) and set their Text property.
(original answer follows)
The Controls collection becomes read-only at a certain point in the construction of the page. You have to do manipulation before that point. I don't remember offhand when it is, but you're safe with OnLoad through OnPreRender.
Where is your code firing from?
Update: Okay, I see what you're trying to do. This will be easiest if you're dealing with server-side controls (that is, controls generated by ASP.NET. That would look like this in your aspx (or ascx):
<asp:TextBox runat="server" ID="studentname"/>
Then you could update the value like this:
abc = (ABC)(Session["xml"]);
studentname.Text = abc.student[0].marks[j].science.something.Value.ToString();
That will set the value of the studentname text box automatically without needing to search through all of the Request.Form items. (Assuming you set j somewhere... I don't know the context for that.)
I can't tell for sure from your code, but it looks like you may just have a "plan HTML" input, which would look more like this:
<input type="text" name="studentname"/>
In that case, there is no simple way to update the value from your page's code, so I'd start by making sure that you're using server-side controls.
You can set the Request.Form values with reflection:
Request.Form.GetType().BaseType.BaseType.GetField("_readOnly", BindingFlags.NonPublic | BindingFlags.Instance)
.SetValue(Request.Form, false);
Request.Form["foo"] = "bar";
What you are trying to achieve?
The Form collection retrieves the values of form elements posted to the HTTP request body, with a form using the POST method. - http://msdn.microsoft.com/en-us/library/ms525985(v=vs.90).aspx
I've just moved to web development and need to know how i can implement below requirement using asp.net and vb.net.
I have three fields in a form which are filled by users. Based on these three values, i need to auto-populate the 4th field. I have planned to implement this in the following way
Write a separate class file with a function to calculate the possible values for the 4th fields based on 1st 3 inputs. This function can return some where between 1-10 values. So I've decided to use drop-down for 4th field, and allow users to select the appropriate value.
Call the above function in onchange function of 3rd field and take and use the return values to populate the 4th field. I'm planning to get the return values in array field.(Does this need a post back?)
Please let me know how if there is better way to implement this.
Thanks.
You may want to consider doing this with Javascript. You could read and control the fields pretty easily with pure Javascript, or using a nice library like jQuery (my favorite). If you did it this way, no post-back would be required and the 4th field would update immediately. (Nice for your users)
You can also do it with ASP.NET for the most part. "onchange" in ASP.NET still requires Javascript as far as I know, it just does some of it for you. A post-back will definitely happen when you change something.
You need javascript or to set autopostback=true on your form elements.
From a user perspective the best thing is to use javascript to populate the field for display, BUT when the form is submitted use your backend function to validate it. This will make sure the user didn't change the value.
An easy way is to use jQuery for the UI (that way you don't have to worry about long winded javascript and deal with browser compatibility as it's already taken care of for you) and have it call to the server for the data. For the server, your easiest route is to return JSON for looping values.
Include your jQuery:
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
Then add in a handle for the JavaScript:
<script type="text/javascript">
function autoPopulate() {
var value1 = $('#ddl1').val();
var value2 = $('#ddl2').val();
var value3 = $('#ddl3').val();
var url = 'path/to/your/file.aspx?value1=' + value1 + '&value2=' + value2 + '&value3=' + value3;
$.getJSON(url, function(data) {
data == null ? return false : data = eval(data);
var ddl = $('#ddl4')[0];
for (i = 0; i < data.length; i++) {
var option = new Option(data[i][0], data[i][1]);
if ($.browser.msie) {
ddl.add(option);
} else {
ddl.add(option, null);
}
}
}
}
</script>
(Yes, I know I used a native loop but I'm little lazy here today :) )
Now, for your server side code you'll want your code your page to return data in the format of:
[['value1','text1'],['value2','text2'],['value3','value3']]
so something like:
<script type="vb" runat="server">
Private Sub Page_Init()
// get your data
// loop through it and add in values
// ex.
Dim result As String = "[" //start multi-dimensional array
For Each Item As String In data
result += String.Format("['{0}','{1}'],", _value, _text)
Next
result = result.SubString(0, result.Length - 1) // removes trailing comma
result += "]" // closes off m-array
Response.Write(result)
Response.Flush()
End Sub
</script>
Does anyone know how to get actionscript to render a null date value '000:00:00T00:00:00'? I am calling a web service that expects date fields in the SOAP xml. I need some of these dates to serialize as null and I can't see how to produce null. The closest value I can get is '1899-11-30T00:00:00Z'. Below is the code I am using:
var dateStr:String = "0000-00-00T00:00:00+";
var emptyDate:Date = DateUtil.parseW3CDTF(dateStr);
newReqData.DateTimeInit = emptyDate;
You can probably do it with a date formatter. You'll have to create a Date object but if you pass it to the DateFormatter, you can set the format to pretty much whatever you like. Here's the reference and I would recommend looking at the "Other Text" area:
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/formatters/DateFormatter.html
var d:Date=new Date();
d.setTime(-62167226400000);
Alert.show(d.toString());
or as said Shawn Yale, read this.
I am using the Ajax Control Toolkit Calendar Extender control. In some fields though I want to display the time along with the date. I have tried just setting the Format to "dd/MM/yyyy hh:mm:ss" but the time section gets wiped off. If the user wants to change the time section they can do it manually, the calendar drop down is only used for changing the date part.
Are there any workarounds or alternatives to get this working?
I have a similar issue and I'm planning to use a Date field and an associated time dropdown (in 1/2 hour increments). User sets the date in the date field, optionally using the calendar control, and pulls down to a valid time. I plan to have one selection in the time drop down be a "don't care" in case it an "all day" event.
[EDIT] I found this jquery plugin that I may end up using. I also found a link to Gaia DateTimePicker in the answers to this post (which now looks to be deleted, probably because the OP was asking for WPF controls, not web controls).
The Ra-Ajax Calendar is coming out with TIME support this upcoming Friday (28th of Nov. 2008) and it's LGPL licensed...
Based on CalendarExtender, you can set the format as "MM/dd/yyyy". After the user select the date in calendar, it will return 04/28/2009 for example. In the date selected event, you can append the current time after the date returned.
OnClientDateSelectionChanged="dateselect"
function dateselect(ev)
{
var calendarBehavior1 = $find("Calendar1");
var d = calendarBehavior1._selectedDate;
var now = new Date();
calendarBehavior1.get_element().value = d.format("MM/dd/yyyy") + " "+now.format("HH:mm:ss")
}
The only way to add time component to the AjaxControlToolKit CalendarExtender, is to append it using OnClientDateSelectionChanged and JavaScript.
<ajaxToolkit:CalendarExtender ID="ce1" runat="server" PopupButtonID="calImg" Enabled="true" Format="dd/MM/yyyy" TargetControlID="txtLeft" PopupPosition="TopRight" OnClientDateSelectionChanged="AppendTime"></ajaxToolkit:CalendarExtender>
and
<script language="javascript" type="text/javascript">
//this script will get the date selected from the given calendarextender (ie: "sender") and append the
//current time to it.
function AppendTime(sender, args) {
var selectedDate = new Date();
selectedDate = sender.get_selectedDate();
var now = new Date();
sender.get_element().value = selectedDate.format("dd/MM/yyyy") + " " + now.format("hh:mm tt");
}
</script>