I am using this code to clear the contents of my panel
For Each c As Control In PanelEdit.Controls
If TypeOf c Is RadTextBox Then
DirectCast(c, TextBox).Text = String.Empty
[Code]....
the idea is if a user opens a different panel and then comes back to the panel they were in all the data is cleared.
I am doing a school project and have created a small program that allows the user to create a binary search tree and then visually displays it on the screen as a familiar tree structure, how the addition, deletion of nodes in the tree works along with many other things such as different tree traversals. I currently using a large panel on the main form and then adding user controls containing a textbox that displays imputed values,then using the panels paint event I draw a line between the user controls, this works fine however for deletion of a node I need to clear the main panel of the nodes that will change and add them to the panel again or just clear the hole panel and redraw the whole tree
View 1 Replieshow to clear lines drawn on a panel.on some event i want to clear lines which r previosly drawn
View 1 Replieshow to clear lines drawn on a panel.on some event i want to clear lines which r previosly drawn
View 3 RepliesI'm trying to hide the scrollbars of a panel and scroll programmatical, is there any way to hide the scrollbars?
View 1 RepliesI am brand new to Vb.Net and was wondering how I could loop through each label and say if the label.text = 0 then Hide panel1. How would I get that accomplished?
[Code]...
I have a panel that Iv added some groups to dynamically. Inside this same panel I have another panel that is NOT visible. I also added some groups to this panel. I placed a button "btnMoreLess" that sets the nested/hidden panel .visible = true however I never see it appear. If I unnest the panels it seems to work, but does not have the effect I am looking for. I want all these groups to be inside the main panel, and have scrolling enabled. The hidden panel is set to autosize so it wont scroll. My thought is that when the click "btnMoreLess" the additional groups will become unhidden and cause the scrollbar on the main panel to appear with all the additional groups. Perhaps there is another method to do this?
View 6 RepliesI created a simple usercontrol AutoHidePanel by using toolStrip and a panel, which have to work like Solution Explorer. When the user click's the autohide pin the panel width will slowly minimized up to 3 pixels so that the user can't see that panel. when the mouse moves over to the control, It will appear as before and these functions are working fine.
But I have a prob. with below function. When the mouse leave the control, it should disappear again. so i wrote hide function in to the MouseLeave event of Both controls(Toolstrip and panel) Here the prob. begins, when the cursor moves from Panel to ToolsStrip or ToolStrip to Panel the MouseLeave event minimize the AutoHidePanel Control. I tryed this Hide Function in the MouseLeave event of my control AutoHidePanel but that dosen't even raises the event because the panel is filled in my control.
how to animation effect in win forms my main form 4 buttons and 4 panels each button click i need to show appropriate Panel can show n hide the panel with some animation effect how to do this
View 6 RepliesHow to hide or show rows in a table layout panel.
As I used rowstyle property and it works
But the issues are
1) It works very slow
2) It seems as form is vibrating and lightning behind the panel when rows are hiding or showing(jerky motion of hiding or showing)
I also used the control .visible property for each control of the row but it also make same problem of being slow
I want to know what is code can be write for clear all item in list box??..Here i attach my code for looping for.This looping will display are result in list box. For info i am using visual studio 2005.Public Class Form1
Private Sub btnLoop_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOnWard.Click
Dim num As Integer
[code].....
Is there a clear command that I can use on an array list, I try to use clear but something is wrong here[code]...
View 5 RepliesIt's been a while since I've used VB and I cant seem to remember how to clear/reset a checked list box. I can clear a check box and list box, but not the checked list box. While we're on the subject... what's the proper prefix for a checked list box? I've just been using clbListBox but I dont think that's correct.
View 3 Repliesdatagridview1.rows.clear()
And this one
me.datagridview.rows.clear()
It says I cannot clear the datagridview list.
How can i clear this list. Is this list called Recent or?
View 8 RepliesI am trying to make it so when i choose a item in the combo box the list box is cleared i have tried these two codes and i cannot thing of any others but it does not work can someone help me? [Code]
View 1 RepliesI have the following class:
[Code]...
I could be way off here, but it almost seems like ID.IDlist points to the address of mylist and so when mylist is cleared so is ID.Idlist. It seems as though the reason the second block of code works is because I am creating a new list in memory for each ID object and ID.IDlist just points to it... is that right?
What i am trying to do is get a user to change one drop down, which then calls an ajax function which posts to the code behind (vb.net file) then clears and populates another asp dropdown list with the data returned from the function..[code]...
View 2 RepliesIs it necessary to clear a List of String to release memory?Or is it done automatically?
View 1 Repliesbare with me here ok I posted on here a while back, like month to 2 months ago about creating an array of data (user inputed data). But was suggested to go the class route. After weeks of lengthly reading came up with a list collection class.
[Code]...
I need to center the red panel in the middle of the dark grey panel, when you resize the form the red panel should be in the middle, and the red panel can't be resize, anyone have a code or property to do this?
View 2 Repliesis there a way to hide a column i a listview? I know that theres a remove but it would be a pain to remake it when the user wants to bring back the column
View 1 RepliesWhen .Clear() is invoked, is the memory freed up that was allocated when all of the items were added? I need to load several lists of codes from a database depending on the import selected by the user. Each list of codes will be a List(Of String). My idea is that I will load only small strings into a List(Of String) along with a List(Of <class>) for the data I will be validating and manipulating. When I am done, I want all of the data from the Lists to be purged from memory. Will .Clear() take care of that or does the memory still remain allocated and have to be dumped by the OS once memory gets full? (And, incidentally, what causes the OS to decide which memory blocks to dump? FIFO concept?)
There are so many lists, I'm not sure if I just want them sitting in memory or not. Granted, the lists will just consist of a single string value for each code pulled from the database. So there won't be a ton of data, so maybe I could just load all the validation lists at the beginning of runtime and only worry about purging the data List since it will contain between 35-50 "fields" per record and there will be a couple thousand records each import that is run. I don't want my program to actually cause a hit in performance in the long run. I ultimately don't see a problem because I won't be running millions or even hundreds of thousands of records at once, but I just want to be sure.
i dont no much about vb.net ..i am php developer i have just developed a mini application in vb.net i wanted to know how to hide our application from appearing in task manager...
View 2 RepliesI need to browse a file and copy the file from one location to another. I am done with the file copying but I need to add the list of all files present under that folder in a control( dont know which control to use) and it shud be a link....so that when the user clicks that link it should open the file with that reader...
Suppose a pdf file shud be opened by the pdf reader.[code...]
i want to show a panel when a particular item is selected in a radio button list. "Different selection have different panels"
View 2 RepliesI'm trying to create a custom control that contains a List(Of Panel). I quickly ran into an error about the base class Panel being nonserializable. So I created my own class that inherits from Panel and implemented the ISerializable interface. At the surface, everything appears to work, at least everything at design time. I don't know what would happen if I tried to run the application. Anyway, the errors occur when I try to open a file that contains my custom control. For example, I create a new Windows Form and add my custom control to it. I save the Form and close it.
Then I try to open the form and get the following error: Object of type 'MyTestApplication.SerializablePanel[]' cannot be converted to type 'MyTestApplication.SerializablePanel[]'.
I don't know what I'm doing wrong? I've opened the XML file to see what it's actually writing, and read the header notes about using binary base64 serialization. I think that's what I'm using, but I'm not sure.
Below is the code for the class SerializablePanel:
Imports System.Runtime.Serialization
Imports System.ComponentModel
<Serializable()> _
[CODE]...
url...I've got a drop down inside an update panel, and I am trying to get it to allow the person using the page to add users to a list that is bound to a gridview. The list is a global variable, and on page_load I set that to the gridview's datasource and databind it. However, anytime I click the 'add a user' button, or the button to remove the user from the list. It appears like it is doing a full post back even though all these elements are inside the update Panel.[code]Now I thought the point of an update panel was to be able to update things inside of it without doing a full post_back and reloading the page. So if that's the case, why is it calling page_load everytime I click the buttons? I ran this code and debug and I see that even before any of the code associated with button press fires, page_load runs again.I tried putting the gvAssociatedUser.Datasource = associatedFaculty and the line below inside the Page.IsPostBack check, that prevented the page from working. I tried every combination of settings of the update panel for ChildrenAsTriggers and UpdateMode, and none of them worked.
I've tried won't get it to work.It wasn't causing a full postback so I was wrong as to the cause. I thought the page was doing a full post back thus resetting my associatedFaculty list global variable, but it isn't doing a full postback.The issue I am having is everytime I click btnAddUser it will add one element to the associatedFaculty list and thus bound to gvAssociatedusers. This works the first time, but the second time I click it, it overwrites the first element. So it appears like my associated Faculty list is getting reset each time I click the button?
this is currently my code to clear my 5 textboxes
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
TextBox1.Clear()
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
End Sub
I have a timer that runs every time by itself, and for the code the runs in it I would like to have it clear the dataset before it does anything, the timer runs every 10 seconds, so I tried to do dataset.clear but it would crash if the dataset had no values
View 4 Replies