What I Wish to achieve is to extract the select item text and display it into a messagebox (for start, then i'm going to use it for a SQL Query...)
I want to extract that particular selected ITEM, for instance : "SPR (Suivi piece rechange)" in the following image :
I tried this, but when I click on "Menu", it returns the name of my menu strip "MenuStrip1" :
Private Sub MenuStrip1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuStrip1.Click
MessageBox.Show(DirectCast(sender, MenuStrip).Name)
End Sub
EDIT:
I forgot to mention that all the ITEMS are added dynamically from the database,
so there will be no predefined Private Sub....End Sub Procedure for these Items.
Thanks in advance.
The MenuStrip object only refers to the actual menu strip itself, not the individual menu items, which are actually ToolStripMenuItem objects. You're looking for the Text property of those objects. For example:
DirectCast(YourDynamicMenuItemObjectHere, ToolStripMenuItem).Text
If you're looking for a way to capture events, you'll need to create a generic event handler:
Private Sub GenericMenuItem_Click(sender As System.Object, e As System.EventArgs)
MessageBox.Show(DirectCast(sender, ToolStripMenuItem).Text)
'Whatever else you need to do based on the text of the menu item
End Sub
And then hook that handler to the menu items whenever they're created:
'Code that creates YourDynamicallyGeneratedMenuItem
AddHandler YourDynamicallyGeneratedMenuItem.Click, AddressOf GenericMenuItem_Click
Related
I have a group box with multiple Checkboxes(food item) and each one has a corresponding NumericUpDown control(quantity). For context, it is for a project based on a restaurant menu. I want to hide a button called btnSave whenever either a checkbox is unchecked or the quantity (NumericUpDown) is changed. I currently have btnSave.Hide under the CheckBox1_CheckedChanged and NumericUpDown1_CheckedChanged SubProcedures but I want to know if there's a way to do this when anything within this group box is changed instead of putting the code under each SubProcedure. Thanks
I think you meant .ValueChanged for the NumericUpDown control. (There is no .CheckedChanged) Although this doesn't matter much in this case, this is a good pattern for future reference. Instead of calling an event call a Sub from your events.
When you have several controls responding to a single Event handler, you can find out which control triggered the event by checking the sender parameter. Since, as you can see, sender is an Object you will have to cast it to the appropriate type to get the properties of a CheckBox.
Private Sub HideSaveButton()
btnSave.Hide
End Sub
Private Sub CheckBoxInGroupBox_CheckedChanged(sender As Object, e As EventArgs) Handles CheckBox1.CheckedChanged, CheckBox2.CheckedChanged
HideSaveButton()
Dim WhichCheckBox As CheckBox = DirectCast(sender, CheckBox)
Select Case WhichCheckBox.Name
Case "CheckBox1"
MessageBox.Show("CheckBox1 has changed")
Case "CheckBox2"
MessageBox.Show("CheckBox2 has changed")
End Select
End Sub
Private Sub NumericUpDown1_ValueChanged(sender As Object, e As EventArgs) Handles NumericUpDown1.ValueChanged
HideSaveButton()
End Sub
What I need:
I was a basic equivalent of a select box i.e. a combobox of dropdown list style (that preferably doesn't allow text input).
I need to add the list items by code rather than the property box.
What I have:
Private Sub Form_Load ()
ComboStaffMember.AddItem "John Murphy"
End Sub
...produces "...add item is not a member of system.windows.forms.comboxbox".
Private Sub Form_Load ()
ComboStaffMember.Items.Add("John Murphy")
End Sub
...produces no result.
My question:
Why is the item not adding? The form name is FrmStaffLogIn and it's in Form1.vb. Should Form_Load correspond to either of these or is my code incorrect elsewhere?
Try to put combo add statement in following format in form load event :
Private Sub Form_Load ()
Me.ComboStaffMember.Items.Add(New DictionaryEntry("Text to be displayed", 1))
End Sub
Are you sure your code line ComboStaffMember.Items.Add("John Murphy") doesn't work? it should work just fine.
The Add() method On Item collection expects object parameter and string as well can be passed as argument to it. Like below [C# code sample]:
this.comboBox1.Items.AddRange(
new string[] {"SomeText","SomeOtherText","LastText"});
Also, you probably don't see any item cause you haven't set a default selected item. Just expand the dropdown and you will see the items. To set the default selected item
this.comboBox1.SelectedIndex = 0;
Working code:
Private Sub FrmIdentCust_Load(sender As Object, e As EventArgs) Handles MyBase.Load
ComboStaffMember.Items.Add("John Murphy")
End Sub
I was missing (sender As Object, e As EventArgs) Handles MyBase.Load.
I have created a form that allow users to close a form by clicking anywhere on the enlarged picture form (There are 3 objects to consider) and go back to the other form, which is called: "frmPhone". There's an actual picture on the form: "frmPhonePics" which is what I'm using to accomplish what I'm trying to do (was unable to insert an image on here. Sorry.) What I want to do is write a single click event to close the large picture form to allow the user to close it absolutely anywhere in the form, but I don't know how to do that. Here's the code I have so far:
Private Sub frmPhonePics_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Click
frmPhone.Show()
Me.Hide()
End Sub
It sounds as though you have a picture on your frmPhonePics form. If you double click that (from the VBA editor), you should be taken to the code - for example, you might see
Private Sub Image1_Click()
End Sub
Now all you have to do is add your code there:
Private Sub Image1_Click()
Me.Hide
frmPhone.Show()
End Sub
Note - the order matters, since frmPhone.Show() will "hijack" the code flow until it's dismissed, and in your code Me.Hide will not execute (so the form will not close) until frmPhone has been dismissed.
You can map the click handler for various object to one thing, if that is what you are asking:
Private Sub frmPhonePics_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Click, Handles picLarge.Click, Handles otherThing.Click
frmPhone.Show()
Me.Hide() ' should be Me.Close?
End Sub
Not sure why it is MyBase.Click in your code instead of Me.Click. Is this a subclassed form?
I'd strongly suggest using a DoubleClick instead of a single Click. The chances of an errant click doing the wrong thing is very great.
The easiest way is right from the designer. Write the sub routine, then for each control, in the properties window, click the events icon(thunderbolt) and assign the sub routine to the double-click event.
Alternatively, dispense with the Handles clause completely and use a series of Addhandler statements in the Load event handler. If you put a unique string in the names of the controls or if it's all the controls, you can iterate through the controls and use one addhandler statement for all of them
For Each c As Control In Me.Controls
AddHandler c.DoubleClick, AddressOf Ctrl_DoubleClick
Next
Private Sub Ctrl_DoubleClick(sender As Object, e As EventArgs)
'Do stuff
End Sub
This is a VB.NET winforms project, using EF. The ComboBox is bound to a seperate datasource which contains the colums tName and tNumber. TName is a brief description of that value and tNumber is the actual number that is saved in the Financial Table under column named transaction_type. Everything works flawlessly on the display of existing data that is in the Financial Table.
The comboboxes for each item in the grid all show the correct description for the transaction_type. But when ever I change the value of any of the combo boxes and click the save button it does not save any value to the transaction_type.
Any ideas why this might be? Any missing code I will add if required..
The form_load event looks like this:
Private Sub paymentHistoryView_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
FinancialDataGridView.DataSource = db.financials.Where(Function(f) f.TenantId = tenentId).OrderBy(Function(f) f.transaction_date)
TranstypeBindingSource.DataSource = db.transtypes.OrderBy(Function(f) f.tNumber)
BindingNavigatorDeleteItem.Enabled = False
End Sub
And the savebutton click event is as follows:
Private Sub FinancialBindingNavigatorSaveItem_Click(sender As System.Object, e As System.EventArgs) Handles FinancialBindingNavigatorSaveItem.Click
db.SaveChanges()
End Sub
The properties for the ComboBox are shown Below:
It should be noted that all other changes to the datagrid are saved correctly when the save button is clicked... After further testing the value will actually save if the ComboBox is no longer selected. I guess a work around would be to focus on something else after the value of a comboBox is changed. If this seems like the best way how would I hook on SelectedIndexChanged event for comboBoxs in the datagridview???
I think that if you check, the same thing will actually happen with the other columns in the datagridview, if you do not move out of the cell before clicking the save button. The good news is that you only need to add one line of code.
FinancialDataGridView.CommitEdit(DataGridViewDataErrorContexts.CurrentCellChange)
Now your SaveItem_Click event handler should look like this:
Private Sub FinancialBindingNavigatorSaveItem_Click(sender As System.Object, e As System.EventArgs) Handles FinancialBindingNavigatorSaveItem.Click
FinancialDataGridView.CommitEdit(DataGridViewDataErrorContexts.CurrentCellChange)
db.SaveChanges()
End Sub
This will commit the dirty cell before the save.
See https://stackoverflow.com/a/6469559/269123
I have a gridview that is populated and a button outside the gridview that I want to enable editing on the selected row when clicked. I have this in the code behind. What goes in the btn_click event to invoke the grid view editing?
Protected Sub GridView1_RowEditing(ByVal sender As Object, ByVal e As GridViewEventArgs)
GridView1.EditIndex = e.NewEditIndex
FillGrid()
End Sub
Protected Sub btnEdit_Click(ByVal sender as Object, ByVal e As System.EventArgs) Handles btnEdit.Click
What goes here??
End Sub
There is a problem with this approach.
"GridView1_RowEditing" is expecting a row index, so it can turn on "EditItemTemplate" accordingly, correct?
But If you want to click on button outside of Gridview and make entire Gridview editable, you shouldn't trigger GridView1_RowEditing, since you don't know what editindex to pass.
You need to implement editable control(textbox) as part of "ItemTemplate", not in "EditItemTemplate".
And visibility of this control would be controlled by the outside button you have created, which will flag the visibility on / off.
Please review following link, this demonstrates how it should be implemented.
http://highoncoding.com/Articles/219_GridView_All_Rows_in_Edit_Mode.aspx