I got a combobox which is filled with values from datasource. By default the first value is chosen which is fine but I need to display "Choose country" as the default combobox text. The user then can choose from the drop down list.
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i create my custom combobox control and i'd like to set DropDownStyle property on DropDownList but it not works correctly. [Code] When i put my custom control in my form i want to see DropDownStyle set to DropDownList and not DropDown as default.
View 9 Replieschoosing a combo box event for placing this code. I have tried with ostfocus,leave,mousefocuschanged,displaymemberchanged like this but nothing works and Lable26(Default I set Visible:false ) is visible even after I select an Item.
If combotype.SelectedIndex = -1 Then
Label26.Visible = True
Label26.ForeColor = Color.Red
[code]......
I am making a simple unit converter, and wanted the user to specify the number of decimal places to be displayed for the results.
The user selects which conversion they want to perform from another combo box, and I have a select case to decide the calculation needed. Eg.
Select Case cboUnitType.SelectedIndex
Case 0 'grams to ounces
lcUnit2 = lcUnit1 * CSng(0.00220462262)
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I have made my program but I want to give users the option of choosing a custom color for text. I have an inputbox that works and then converts it to Color.whatever. But seeing as the user types in what they want and it is not done by the program itself it can throw exceptions.
Dim directresponse As String
Dim actualcolor As String
Dim isgood As Boolean
[code]....
That is my Sub, it will make Color.(userinput) but I need to check if Color.(userinput) is actually a color that VB.NET can understand and add set.
I have tried "System.Drawing.Color" I get told it is a type and cannot be used in this context.use System.ComponentModel.TypeDescriptor to convert it to a color and check if it is real and then set it.
I am new to vb.net and I have looked at other topics. I cannot find the answer I need. OK I have a combobox named cboRaceDesc and five checkboxes (CkRaceAfricanAmerican, ChkRaceAmerican Indian, ckRaceAsian, ckRacePacificIslander, and ckRaceWhite). I was going to post an image, but I cannot.cboRaceDesc has two options...Hispanic and Other. If the user selects Other then they have to choose one of the five checkboxes or it will raise an exception when the record is being saved. I am assuming I would generate the code under the "save" button. I know I need to gather the following information in my code:
If cboRaceDesc.SelectedValue = Other Then
<I am not sure how to code the logic regarding the checkboxes>
<I know I need to use multiple else/else if statements>
<I know towards the end I would generate the exception>
End
Can anyone help me fill in the blanks or point me in the right direction?
I was trying to block the closing of a custom combo box popup window in my custom DataGrid. The popup window comes by pressing F4 or ALT+DOWN keys in my datagrid which is getting closed if I press the down arrow for the first time, after showing the first value in the combo box as selected. Next time onwards, if I press the F4 key and down arrow, I can move to any item in the popup window and select the item using keyboard and in that case, the popup window is not getting closed till I press the ENTER key or selection using the Mouse. Is there any specific reason for this behaviour or something is missing in my code part? [code]...
View 1 RepliesI was trying to block the closing of a custom combo box popup window in my custom DataGrid. The popup window comes by pressing F4 or ALT+DOWN keys which is getting closed if I press the down arrow for the first time after showing the first value in the combo box as selected. Next time onwards, if I press the F4 key and down arrow, I can move to any item in the popup window and select the item using keyboard and in that case, the popup window is not getting closed till I press the ENTER key or selection using the Mouse.
View 13 RepliesI have a combobox which contains a sample of names selected from a table.Currently the default name displayed in the box is the 1st name found in the table. What I would like to do is display the name of the person who is doing the selection as the default. The name is stored in a public variable 'PubName' and I do not want the user to be able to type into the combobox themselves.Is this possible?
View 2 RepliesI'm in a VB Class, so we're not doing anything doing anything too complex, but I'm writing a program using Combo Boxes as a drop down boxes.When I run the program, they come up blank, and I'm trying to set the property of the Combo Box to show up with "(None)" instead of just being blank, but I can't find the control to set the property for that. I have all my items in the collection, and I'm wondering if there is a control character that will denote it as default in the collection set similar to when typing & before a letter will denote it as an "Alt-Activated" control.
View 4 Replieshow to make radio button and combo box has default value?
View 2 RepliesI am making a custom ComboBox, inherited from Winforms' standard ComboBox. For my custom ComboBox, I set DrawMode to OwnerDrawFixed and DropDownStyle to DropDownList. Then I write my own OnDrawItem method. But I ended up like this:
How do I make my Custom ComboBox to look like the Standard one?
Update 1: ButtonRenderer After searching all around, I found the ButtonRenderer class. It provides a DrawButton static/shared method which -- as the name implies -- draws the proper 3D button. I'm experimenting with it now.
Update 2: What overwrites my control?I tried using the Graphics properties of various objects I can think of, but I always fail. Finally, I tried the Graphics of the form, and apparently something is overwriting my button.
Here's the code:
Protected Overrides Sub OnDrawItem(ByVal e As System.Windows.Forms.DrawItemEventArgs)
Dim TextToDraw As String = _DefaultText
__Brush_Window.Color = Color.FromKnownColor(KnownColor.Window)
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I have a form that uses a binding navigator. I want to be able to set a default value to a combo box when I create a new record using the + button on the navigator. Does anyone have any experience with this?
View 10 RepliesFor a drop down combo box, if you place 0 as a custom mask, you can enter only numbers. If you place A as the custom mask, you can enter letters and numbers. How can I make it so that you can enter only letters?
View 3 RepliesI know this is really picky, but can I have one template inside a user control:
<uc:MyUserControl runat="server" ID="test">
<div><b>Test</b></div>
<asp:PlaceHolder runat="server" id="pH" />
</uc:MyUserControl>
Instead of what I have now which requires me to:
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how do i set the default size of a custom control ?
View 10 RepliesCurrently when i add my control to a form and double click it it adds a sub with the handle control.load to the code but i want it to be control.click when i double click it
View 1 RepliesI have a vb.net application, and I have a combobox which should contains a display member (text) and a value member (integer).the problem is:I want to set a default value to that combobox when the form load but I don't have a load event as I create the form and the combobox dynamically. i have used the combobox.selectedvalue =6 but it doesn't work.note: I can't use the selectedindex property because sometimes the value comes from a DB table primary key which is not the same as the combobox index.
the code:
Private Sub fill_combo(ByRef combo As ComboBox, ByVal nodes As HashMap)
Dim comboData = New BindingList(Of KeyValuePair(Of Integer, String))
nodes.movefirst()
Do While Not nodes.eof
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I can not locate the correct method to make the first item in a combo box visible.
The app starts with an empty combo box. The user makes a radio box selection then clicks Go! (how original). The combo box is loaded via an LDAP query. All this is working just fine. The problem is the combo box still appears to the user to be empty. They must click the arrow to see the options.
How do I make the first option 'visible' after the users clicks Go!?
I want to disable the majority of the built-in functionality of the WPF Richtextbox that is found in "EditingCommands"
How can I go about disabling them?
I created a Custom Class and Implemented a Type Converter for it. I used this Custom Class as a new property of a Custom Control.Everything is fine at design time. I can set the values of this property but at run-time the values i entered resets back to the initial declaration i made.
View 5 RepliesI just had a question because I cannot seem to find the answers anywhere on the internet... also we are not upto this part in class yet.. Say I have 2 combo boxs... cmb1 and cmb2.. both are datasets from an access table.. how do I make it so cmb2 refreshes based on the value of cmb1? eg; if cmb1 is say, period 1, then i want cmb2 to only show results bases on items I have in period 1?
View 2 RepliesWhat are the steps to create a Default Value for a ComboBox? say you have two items "Enabled" and Disabled" and you want one of them to be the default value that is selected.
View 11 Repliesi am developing vb.net windows application. i have a combobox. In that i added items in its properties as follows
<- - - select- - - >
school
hospital
office
others
when i run my application i need to display the selected item as "<- - - select- - - >" but it display empty.....
If we say blue is the default colour of the Backcolor property I understand it as if you don't specify a colour for Backcolor blue will be its colour. But I could not make sense of default property of a class in the context of building a custom user control. After calling an instance of a class we have to either call one of its members or assign an other object for it. Therefore why should there be a default property?
View 9 RepliesI made a custom button by inheriting the Button class. When I double click the custom button in Designer, it makes the event handling function for MyButton.Click:
Private Sub MyButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyButton1.Click
End Sub
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I have 2 comboboxes. When I choose a country in cboLand I want only the states to show in cboStaat that are associated with the country from cboLand. I tried the code below but I get all different error messages. Perhaps you can see something in my code that I missed.
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OK i have a combobox on the form. I have entered 4 values. I have left the TEXT field blank.Is there any way i can set the default SELECTEDINDEX of the combobox in the form design window. I know how to do it using code. If i set the TEXT field to one of the item values will it automatically select the corresponding INDEX
View 1 RepliesI programatically / runtime created combobox and bind it to a datasource but can not set its default value. Since I am using the Handler of SelectedValueChanged, this is causing the program to mis-fire. Here is the code I am using.
Public WithEvents T_combo as ComboBox
'dictionary holds data to use in other parts of program
Dim T_Dict As New Dictionary(Of String, String)
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In a combobox dropdown. What toolbox or properties do I use in VB Express 2010 to add a default to my drop down so the user will see the default when the panel is first shown?
View 3 Replies