I have a combobox which is bound to a bindingsource.
What's the correct way to get the combobox selectedvalue on the selectedindexchangedevent?
is combobox1.selectedvalue correct or must I use the bindingsource to get the value?
What I want to do here is that for every new item added into the combobox the label will +1 from the previous number. How do I write it out assuming I didn't assign the items a number [Code]
View 2 RepliesI am using VB 2010 express edition, using windows form, i set my access database using the database connection wizard, and then use a combobox and bind it to the database using the properties windows, while other fields of database (set in textbox form), i drag it to my form. Running it, the values of textboxes are correct when i changed the value of my combobox. I want to use these values in textbox in drawing circle, whenever i change the value of combobox, the circle will also change using the combobox selectedIndexchanged event, my problem is, the value in textbox does not update in order to draw the circle, i have to use lostfocus or leave event to correct it. I make also a combobox and textbox not using this Ado.net(correct me if im wrong), it is working using the selectedindexchanged event only, what seems be my problem,
View 1 RepliesI have a ComboBox that contain ProductIDs and a DataGridView that lists Categories which a product can be a member of. My DataGridView list ALL categories, however, it has a checkbox column that get checked when the ProductID is a member of that Category, otherwise it is unchecked. A user may also check or uncheck a category checkbox then save.
The problem is, if a user forgot to save before changing the ComboBox, then his changes on the previous ProductID is gone How can I give the user a chance to either save or ignore the changes done on the previous ProductID (before selecting a new ProductID)?I searched the internet for an answer and I found the following code but it is in C# and I am not sure if it solves the problem or not!
[Code]...
What is the method to not allow combobox SelectedIndexChanged to be executed on load. and only make it to be executed when a "USER" changes the selection value.
View 1 RepliesI'm designing a login screen which MUST allow the user to ONLY select a login via a combobox. A user has THREE login attempts only, the problem Im experiencing is resetting the count if they hilight the combobox, move the selection around but ultimately click on the original name.I can use either SelectedIndexChanged or SelectionChangeCommitted but they are both activated even if the same login is selected.So you can select a login enter the password twice and then click on the combobox move the selection around before finally clicking the original name and the login count is reset to 0.Is their a way to do this without using variables to store the previous value (perhaps using validating/validation methods)?
View 4 RepliesI used the following code for displaying the data in datagridview according the to the selection from combobox1 and combobox4,, but the problem is that : it doesn't work perfectly with two comboboxes , it works only with the first combobox which be put.
[Code]...
In the context of data-bound combobox whose ValueMember and DisplayMember properties are appropriately set:Is there a difference between the SelectedIndexChanged and the SelecetedValueChanged events? Are they fired simultaneously when an item is selected from the drop-down list of the combo?
View 1 RepliesCan we stop the SelectedIndexChanged Event of combobox at runtime? bcoz when i go to last record my sencond combo is refreshed & It will show 1st Item. but i want to see related item with 1st combo.In the database records are stored with related item.but on frontend..
Amother question is, I want to work with Datagridcombobox. My datagrid contains 3 comboboxes. When i clicked on 1st ,2nd combo should be filled. Same like 2nd third. How can we handle the event of DatagridCombobox??
When my form loads, before the ComboBox has been populated and selected this Event (SelectedIndexChanged) gets triggered. How can I prevent the code insides this Event from Executing before form has completely loaded? I tried testing for .SelectedIndex but it returns 0.
View 3 RepliesIn my app I have a combobox and a sub wich handles the SelectedIndexChanged. It all works fine, but if the user goes crazy with the mouse scrollwheel changing the selected item in the combobox, the program will sometimes stop working for different reasons.
Now, what I want to do is to make some sort of sleep/wait function in the SelectedIndexChanged event handler, so that if the index hasn't changed in let's say 100 milliseconds, it will continue the code. If the index has changed, it will wait until the user has finished going crazy
What is the best solution to accomplish something like this? I've been thinking about using Thread.Sleep, but I can't find the correct way of doing it.
send me sample code for SelectedIndexChanged event for Combobox , whn i change value in Combobox through SelectedIndexChanged event then data should be change in Other Combobox and Textbox.B`se i am tring a lot for this but last i am not able to get.In load Event i bind the data in Combobox control .
If All controls bind the same table then how can do code?? and if controls bind different tables then how can do code??
I have a few reasons that I need this to happen, but suffice it to say that when I use the event handler for the RadioButtonList the sender object returns as just the RadioButtonList, and I need more information from the GridView because that's how I can uniquely identify which record my RadioButtonList is tied to.I added an "OnSelectedIndexChanged" property to my GridView but it doesn't fire/handle when I want it to. I'm assuming this has something to do with the way the GridView is designed to work. I also thought about using a hidden field, but I can't add it to the RadioButtonList so it won't help unless it's global. The problem with it being global is that I can't set the value uniquely to the record that has it's RadioButtonList being altered.
View 1 RepliesWhy would this event only work once, the first time I select an item? If I select another item off the list nothing happens.
View 3 RepliesI have a GridView, without using SelectedIndexChanged, how can I retrieve the value of each row from GridView when click on each button in each row?this is my aspx code
[Code]...
I have a situation where I'm allowing users to enter new values into a combo box or selected existing values from the combo box's drop-down list. Is ther any way to tell whether a value was entered or selected? I've looked at the TextChanged and SelectedIndexChanged events and neither will do what I need to do.
View 3 RepliesOn a form I have a DataGridView. Inside this DataGridView i have several columns of which one is combobox and the others are textboxes.The combobox column is populated with values from a MySql database table using a query. So far so good. What i want next is to populate a certain textbox from that DataGridView, automatically after a value from the combobox is selected. When a value is selected from the dropdown list of the combobox, that value is used in a SQL query to find the value that will be displayed in the textbox.All the textboxes and the combobox are inside the DataGridView!)I did this using DataGridView EditingControlShowing event because a DataGridViewComboBoxCell does not have aSelectedIndexChanged event.The value is displayed correctly in the textbox, but the problem is that the value selected from the combobox disappears after the selection, and the combobox remains empty. I need the value to remain in the combobox after it was selected and after the corresponding value was inserted in the textbox!Here is the code for this:
Code:
Private Sub test_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Populating the combobox
[code]....
I have combo box selectedIndexChanged events going on but I cant figure out how to get the value out of them so that when i hit the btn_ProjSal that the new salaries show up in the 3 labels. Here is my code. Doing it straight from the selectedIndexChanged event this works..but to get the button to pull the new values from each of those events is my issue.
Public Class Form1
Dim _emp101Sal As Decimal = 10000.0
Dim _emp102Sal As Decimal = 11500.0
[code]....
For some reason I have always used the SelectedIndexChanged property to take action when something is clicked (I guess because this is the default property? ie when you double click the listbox this is what you get). However I have often come across problems when I try to unselect all the items in the listbox by calling
View 2 RepliesHere is the basic problem. When a listview is set to multiselect = true, the electedIndexChanged event fires for every row. This is very bad in a situation like the following psuedo code:
MultiSelect in listView (many items)
Clear any items that are selected in GridView
find that item in gridView using a brute force compare
[code].....
.net 4.0, ASP.net, vb.net. I've got a usercontrol that is using an obout combo box. The obout is a cascading combobox that has 3 levels to it. when something it selected from the third level of the combobox, it is suppose to fire off a selectedIndexChanged event. This happens the first time that I select the usercontrol. The problem is if i want to go back and select something different. The selectedIndexChanged doesn't fire. I've set breakpoints and the AddHandler ComboBox3.SelectedIndexChanged, AddressOf ComboBox3_SelectedIndexChanged
runs just like it did the first time i select the usercontrol. But the selectedIndex just doesn't fire the second go around. Was wondering what i'm doing wrong. Here is the selectedIndexChanged that is not firing
[Code]...
I have a datagrid view on a page that I'm making and I want to be able to open another form when a user "selects" an entry. I've tried looking through the documentation on how to do that but can't seem to find any. Does anyone know of an easy way to accomplish this task?
View 8 RepliesI have two listviews with many items present. When the user clicks an item in ListViewA, I highlight items in ListViewB. I use the SelectedIndexChanged event of A, loop through the items in B and set some highlighting colors, ensuring visible etc. This works fine.However... it would be nice to allow the user to MultiSelect. The problem here is the when selecting 10 items in A (holding the shift key down), the SelectedIndexChanged event fires 10 times, once for each item added into the selection. This is a real pain since my highlight sub then runs 10 times and it takes 10 times as long.Now... I had a plan to deal with that, I detect the shift key being held down and inhibit the event until its raised. That works fine too.But... if I have 10 items selected, and then I click one new one, so 10 are being deselected and one being selected, the SelectedIndexChanged event fires 11 times. So my situation has not improved. Any ideas how to wriggle out of this?
View 15 RepliesI have added the AutoPostBack = "true" attribute to the drop down list. It doesn't work.
<asp:DropDownList CssClass="dropDownList" ID="ddlBusinessUnit"
AutoPostBack="true" runat="server" Width="250px"
OnSelectedIndexChanged="ddlBusinessUnit_SelectedIndexChanged">
[Code].....
How can I ensure that the event method is called?
I have a ListView that populates some fields whenever the user selects an item. However, if they change the data in the fields and then select a new item without saving, I want to display a message box that warns that their changes will be lost, and asks them to confirm whether to continue. Sounds simple.
Unfortunately, the ListView's SelectedIndexChanged event cannot be cancelled, and it's actually called for each change in the selection. So, for example, if item 1 is selected and the user then selects item 2, the event is called twice: once to remove the selection of item 1, and then to add the selection of item 2. If you go from having one item selected to having five (for example), the event fires to remove your original selection, and then again for each of your new selections - six hits in all.
Obviously, this makes it a bugger to determine when the event should be cancelled and reset back to the original. I obviously don't want my message box appearing six times....
I have been looking for a solution to this for a while though and seen many posts that show me how to do it but yet I cannot get my SelectedIndex Changed event to fire when the DropDownList is changed.The DropDownList AutoPostBack is set to True,[code]
View 2 RepliesI need to focus on a textbox after an item has been selected from a dropdownlist.
I've tried control.focus() and setfocus().
The last thing I've tried was Set_Focus(dtbEffectiveDate.ClientID) inside the SelectedIndexChanged method with the folowing method.
[code].....
I have a combobox in winforms, which, depending on what you select, determines what's populated in other comboboxes. I filled the initial combobox using a dataview:
combobox_process.DataSource = dataview
combobox_process.DisplayMember = "UserDefine1"
combobox_process.SelectedIndex = -1
Which works fine, except every one of those lines throws the SelectedIndexChanged event. The function that populates the next combobox listens for that event and so it's running three times. I asked a coworker and he suggested just looping through the data and adding them all manually as strings, but I'd prefer to stick with databinding if I can. Especially if, in the future, I need to do something that I can only do with databinding. Perhaps some way to disable that event during a portion of this code?
Is there a way to set the selected tab of a tabControl without the selectedIndexchanged event firing? e.g. Here the event fires when selecting myTabPage2 because myTabPage1 is the default:
[Code]...
Can anyone tell me what the equivalent of lstview.SelectedIndexChanged would be when switching over to a grid please?
View 1 Replies