C# Discussion Boards - CodeProject

postback issue with dynamically created datetimepicker

Dhyanga4-Dec-14 4:58

4-Dec-14 4:58

Hi,

I am using dynamic datetimepicker that the user can add to any number. But I am having postback problem. Once I submit it, the return page should have all the submitted values including those added dynamic datetimepicker. Right now when i submit and when the page returns, all other static controls with data are there but no dynamically added datetimepicker controls.

Below is the code I used to add datatimepicker dynamically using javascript:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>


<link rel="stylesheet" media="all" type="text/css" href="jquery-ui.css" />
<link rel="stylesheet" media="all" type="text/css" href="jquery-ui-timepicker-addon.css" />
<script type="text/javascript" src="jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="jquery-ui.min.js"></script>
<script type="text/javascript" src="jquery-ui-timepicker-addon.js"></script>
<script type="text/javascript" src="jquery-ui-sliderAccess.js"></script>
<script type="text/javascript">
    $(function () {
      
         var counter = 1;
          jQuery("#<%= btnD1Add.ClientID %>").click(function (event) {
            event.preventDefault(); //this code is added to prevent the default submit functionality of the button

            jQuery("<li>").appendTo(".Date1More");
            jQuery("<label id='lblD1StartTime" + counter + "'>StartTime:</label><input type='text' id='txtD1StartTime"  +counter + "' name='txtStartTime1'/>").timepicker({
                hourGrid: 10,
                minuteGrid: 10,
                timeFormat: 'hh:mm tt'
            }).appendTo(".Date1More");
            
            counter++;
        });
    });
</script>
       <asp:Button ID="btnD1Add" runat="server" Text="Add more time slots" />
       

               <li>
                    <ul class="Date1More">
                                          
                </ul>
               </li>
</html>

Now how to use postback for these controls? I had tried to use following code in code but didn't work. I even tried it using !Ispostback() function under pageLoad but no effect.

protected string[] txtStartTime1;
   protected void Page_Load(object sender, EventArgs e)
        {
            
           
            txtStartTime1 = Request.Form.GetValues("txtStartTime1");
        }
protected void Page_Init(object sender, EventArgs e)
        {
            try
            {
                if (txtStartTime1.Length > 0)
                {
                    TextBox txtStTime1 = new TextBox();
                    txtStTime1.ID = "txtD1StartTime";
                    txtStTime1.CssClass = "timepicker";
                    this.Controls.Add(txtStTime1);

                }
              
            }
            catch(Exception ex){}

        }

Please help..

Dhyanga

modified 4-Dec-14 11:06am.

Re: postback issue with dynamically created datetimepicker using javascript

Richard MacCutchan4-Dec-14 5:01

Richard MacCutchan

4-Dec-14 5:01

Please use the correct forum: http://www.codeproject.com/Forums/12076/ASP-NET.aspx[^] or http://www.codeproject.com/Forums/1580226/JavaScript.aspx[^].

Re: postback issue with dynamically created datetimepicker using javascript

Dhyanga4-Dec-14 8:04

Dhyanga

4-Dec-14 8:04

Thanks. Yes I did.

Dhyanga

How to find a particular embedded resource in an assembly?

Sivaji15654-Dec-14 1:08

Sivaji1565

4-Dec-14 1:08

My function takes resource file name as input and returns Bitmap object.

GetManifestResourceNames returns fully qualified resource names. Sample Input is like "Fileopen.png".

How to find the required resource without doing any string operation ? Or any other way is also welcome.

public static Bitmap GetBitmap_FromResource(string ImageName)
        {
            Assembly assembly = Assembly.GetExecutingAssembly();
            string strResName = GetReqdResourceName(assembly, ImageName);
            if (string.IsNullOrEmpty(strResName))
                return null;

            Stream imgstream = assembly.GetManifestResourceStream(strResName);
            if (imgstream == null)
                return null;

            Bitmap Img = new Bitmap(imgstream);
            return Img;
        }

public static string GetReqdResourceName(Assembly assembly, string strResName)
        {
            string[] resNames = assembly.GetManifestResourceNames();

            // How to find the resource name without string operation
            return null;
        }

Re: How to find a particular embedded resource in an assembly?

Richard MacCutchan4-Dec-14 2:06

Richard MacCutchan

4-Dec-14 2:06

What exactly do you mean by "find the required resource without doing any string operation"? Please explain exactly what problem you are trying to solve.

C# Error check

Member 112847343-Dec-14 18:06

Member 11284734

3-Dec-14 18:06

Hi! I have a problem with how my program handles an invalid input.
It goes like this:

Enter string: Apple
Enter integer: 1

Enter string: Orange
Enter integer: 2

Search array: Apple
Search found with string name Apple with integer number 1

Search array: Banana
Search found with string name Apple with integer number 1

Object searchValue = null; 
string searchString; 
do 
{ 
// input 
searchString = GetCorrectInput.String(message); 

if (!searchString.Equals("Quit")) 
{ 
// array 
for (int i = 0; i < objectArray.Length; i++) 
{ 
if (searchString== objectArray[i].studentName) 
{ 
searchValue = objectArray[i]; 
} 

} 

// check input 
if (searchValue == null) 
{ 
Console.WriteLine("{0} was not found", searchString); 
} 
else 
{ 
Console.WriteLine("Search found string name {0} with integer number {1}", searchValue.stringName, searchValue.integerNumber); 
} 
} 
} while (!searchString.Equals("Quit")); 

Console.WriteLine("Thank you!");

Banana is supposed to be not found but its not Frown | :(

Re: C# Error check

Manfred Rudolf Bihy3-Dec-14 18:20

Manfred Rudolf Bihy

3-Dec-14 18:20

You forgot to set searchValue back to null. The proper place to do that would be at the top of the loop right after searchString is being set.

Regards,
Manfred

"I had the right to remain silent, but I didn't have the ability!"

Ron White, Comedian

Re: C# Error check

Member 112847343-Dec-14 18:34

Member 11284734

3-Dec-14 18:34

is there a way to avoid using null?

Re: C# Error check

Manfred Rudolf Bihy3-Dec-14 19:53

Manfred Rudolf Bihy

3-Dec-14 19:53

Member 11284734 wrote:
is there a way to avoid using null?

Why would you want to do that?
Please explain in detail!

Your code (if it even is your code which I'm now beginning to seriously doubt) uses the check for null explicitly so that would be the way to go.
You could of course use a special instance of whatever class ( it is not shown in your code sample) to signify that the searchString wasn't found, but that special instance also would have to be assigned to searchValue every time somewhere at the top of the loop before coig through the array comparing searchString against studentName.

Regards,

Manfred

"I had the right to remain silent, but I didn't have the ability!"

Ron White, Comedian

Re: C# Error check

Harsh Athalye5-Dec-14 0:14

Harsh Athalye

5-Dec-14 0:14

Apart from resetting searchValue variable to null, I think you also should break out if for loop as soon as you found the matching value in array.

How to copy a file from my computer to a shared folder of another computer with login username and password account

Derz3-Dec-14 14:58

Derz

3-Dec-14 14:58

Any answers are appreciated.

Thanks....

Re: How to copy a file from my computer to a shared folder of another computer with login username and password account

PIEBALDconsult3-Dec-14 16:23

PIEBALDconsult

3-Dec-14 16:23

What Operating System?

With Windows (7) I have been using NET USE to create a mapped drive, COPYing to it, and then using NET USE to /delete the mapped drive.

f:\>net use ?
The syntax of this command is:

NET USE
[devicename | *] [\\computername\sharename[\volume] [password | *]]
        [/USER:[domainname\]username]
        [/USER:[dotted domain name\]username]
        [/USER:[username@dotted domain name]
        [/SMARTCARD]
        [/SAVECRED]
        [[/DELETE] | [/PERSISTENT:{YES | NO}]]

invalid length for a base-64 char array or string

Jassim Rahma3-Dec-14 11:35

Jassim Rahma

3-Dec-14 11:35

Hi,

I would like to ask why I am getting the following error on the below code please?

The error is: invalid length for a base-64 char array or string

and this is the code:

string server = cipher_utility.Decrypt<RijndaelManaged>(xmlClass.read_registry("Softnames", "ServerHost"), "{1234567-1234-1234-1234-123456789012}", "{12345678-1234-1234-1234-123456789012}");

Thanks,
Jassim

Technology News @ www.JassimRahma.com

Re: invalid length for a base-64 char array or string

Richard MacCutchan3-Dec-14 20:56

Richard MacCutchan

3-Dec-14 20:56

Probably because the encrypted data has not been stored (or encrypted) correctly. And you would find debugging your code much easier if you did not write compound statements. It is just as efficient, and so much easier to debug, and to read, to write it as:

string encryptedData = xmlClass.read_registry("Softnames", "ServerHost");
string server = cipher_utility.Decrypt<RijndaelManaged>(encryptedData, "{1234567-1234-1234-1234-123456789012}", "{12345678-1234-1234-1234-123456789012}");

Re: invalid length for a base-64 char array or string

Jassim Rahma3-Dec-14 22:27

Jassim Rahma

3-Dec-14 22:27

so how to go with the fix?

Technology News @ www.JassimRahma.com

Re: invalid length for a base-64 char array or string

Richard MacCutchan3-Dec-14 22:38

Richard MacCutchan

3-Dec-14 22:38

What fix? Your encrypted data is either incomplete or has been corrupted. You need to diagnose the issue to find out how that happened.

Setting an instance object equal to my empty string.

Member 112838693-Dec-14 8:00

Member 11283869

3-Dec-14 8:00

I can't explain it properly in the subject section, it's not as simple as that.

Here is the code snippet in question.

UserPass = reader["Password"].ToString();

So UserPass is my string variable and reader is an SqlReader object.

Here is it being instantiated:

SqlDataReader reader = myCommand.ExecuteReader();

(myCommand is an SqlCommand obj)

reader["Password"]

Password is a column name in my Sql DB. Basically I've just told the reader to go look within that column and used a query to specify where abouts.

I want to set the reader["Password"] equal to an empty string to compare against user input. Now there aren't any errors when I do this but it does throw an exception:

An exception of type 'System.InvalidOperationException' occurred in System.Data.dll but was not handled in user code

It doesn't give much more detail other than that and I'm not entirely sure what's wrong.

Re: Setting an instance object equal to my empty string.

PIEBALDconsult3-Dec-14 8:07

PIEBALDconsult

3-Dec-14 8:07

Nothing you provided looks obviously wrong. Which statement throws the Exception? We may need to see the query.
And provide the code in proper order.

modified 3-Dec-14 14:47pm.

Re: Setting an instance object equal to my empty string.

Shweta N Mishra3-Dec-14 21:21

Shweta N Mishra

3-Dec-14 21:21

did you debug to identify on which line you had the issue?

Mark the answer as accepted if that worked for you Smile | :)

.

And for down-voters please specify the reason to improve the solution Smile | :)

How to send cell value from DataGrid to text file?

Member 100245173-Dec-14 5:01

Member 10024517

3-Dec-14 5:01

HI...
I am beginner in WPF and I have a problem with saving data from DataGrid to text file (text file is usedby other program). I check on google, bing and find nothing. Please help.

Re: How to send cell value from DataGrid to text file?

ZurdoDev3-Dec-14 5:14

ZurdoDev

3-Dec-14 5:14

I'd suggest you post your code and show where you are stuck.

There are only 10 types of people in the world, those who understand binary and those who don't.

Re: How to send cell value from DataGrid to text file?

Richard MacCutchan3-Dec-14 6:31

Richard MacCutchan

3-Dec-14 6:31

Member 10024517 wrote:
I have a problem

You need to explain clearly what that problem is if you want assistance.

Re: How to send cell value from DataGrid to text file?

Member 100245173-Dec-14 7:41

Member 10024517

3-Dec-14 7:41

I will paste my code later, but what I want is to save (export) data from data grid to text file. For example we have few columns number|data|description|date|img with few rows. Then I want to save that to text file in format
number///data///description///date//img (one row for one line in text file).

Create Hotel Room Booking Calendar

KissGnv2-Dec-14 23:44

KissGnv

2-Dec-14 23:44

Could you recommend me a method how to create a hotel room booking calendar like this?
http://www.daypilot.org/tutorial/hotel/[^]

I have two ideas and I tried to create the calendar, but I have problems with it.

1. idea: Create a DataGridView. It is good because there are cells and header cells in it, it is scrollable, but I can't insert controls in the cells (button or panel) which would show the reservations through days (like in the example) because column span is not supported by the datagridview.

2. idea: Use a TableLayoutPanel. It supports column spanning and I can insert any type of Control in its cells, so I can insert controls which shows the interval, name, etc.. of the room reservation and it can overlap many cells. The only problem is that I have to create row headers and column headers. I created another tablelayoutpanel over the table, it would be the column header. The header would horizontally scroll simultaneously with the main table, but if I turn autoscroll on, the scollbar is visible and it is not good. If I turn off autoscroll, I can't scroll the panel from code. It would be good if I could create an independent hscrollbar and in it's scroll event I could set the header and main tablelayoutpanels scroll position simultaneously.

Have you any ideas?

Re: Create Hotel Room Booking Calendar

ixilom3-Dec-14 1:35

ixilom

3-Dec-14 1:35

If you only need to display data I would still go for the DataGridView.
You can inherit DataGridViewCell and DataGridViewColumn to display pretty much anything you want by drawing things with the provided Graphics object in a overridden Paint (and PaintBorder) method.
Even if you need to edit some small things like, checkboxes it should be quite trivial to implement by drawing it yourself (lookup ControlPaint class) and handle mouse input.

For the how-to, I would suggest reading Robert Kanasz article: How to Create ProgressBar Column in DataGridView[^]
Also, look at Microsoft's documentation:
http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridviewcell%28v=vs.110%29.aspx
[^]
http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridviewcolumn%28v=vs.110%29.aspx[^]

If you need to have some sort of Control in a cell, you can still use the DataGridView, but it gets a bit more complex:
http://msdn.microsoft.com/en-us/library/7tas5c80.aspx?PHPSESSID=o1fb21liejulfgrptbmi9dec92[^]
The approach is almost the same, but you need to, in addition to the cell and column, create a control that implements IDataGridViewEditingControl.

Hope this was helpful Smile | :)

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