I am populating a textbox (txtFileNature) with a value from a popup window. The textbox has an onfocus handler set to
onfocus=("this.blur();")
The problem is that I want to do some calculations based on the value of txtFileNature and want to display the result below it. In which event can I can use my VB code. I can't use the textchanged event since I am not typing in the textbox.
How do I bind a keyboard key to an event? Everything I have found so far is related to using the keyboard for shortcuts to buttons on the form. I guess you could say I want to do the opposite.
For example: This is just basic code I did while learning how to use the xBox controller with my windows forms.
If currentState.Buttons.LeftShoulder = ButtonState.Pressed Then
tbLB.Text = " Pressed"
Else
tbLB.Text = " Released"
End If
Instead of changing the text in my textbox I want to have the left shoulder button or maybe my Dpad act as the "Tab" (let me worry about the controller I've got that handled, as not not confuse anyone) key on the keyboard in order to navigate through my form by tabbing upward or downward through a menu. Then maybe use the "A" button on the controller as the "Enter" key.
Where in: Replacing "tbLB.Text = " Pressed"" with code that would press virtually press the "TAB" key.
Of course using the xBox controller is dealing with XNA, but at this point I have figured out some basics of using the controller with my forms, just need to know how to mimic the keyboard keys.
I have a List<of T> with certain objects. Every individual object has 3 events. How can I bind those events dynamically to methods?.
View 3 RepliesI try to bind a textbox to a datatable but i cant.. I checked if the datatable is filled (it includes the results of a sql query)and it s ok.. i can depict the result in a combo box but not in textbox. I wait for only one result that s why i need textbox instead of combo.. that s my code..
[Code]...
how do i change the display member of a ComboBox after i have entered a code in a textbox that it represent the combobox value?example
Code: 02-001 Combobox: Provider X
if i change the code the provider combobox must change and if i change the provider combobox the code should change!..
if e.keychar = chr(13) Then
combobox.valuemember = textbox.text
combobox.displaymember = me.stockdataset.selectprovider(@textbox.text)
end if
this code change the combo box display member but if I change the comobox by clicking it the code on the textbox doesnt change, to its corresponding code...the combo box is bound to the provider tables....
I'm creating a mindmapper application (as a test) and have a difficulty to manage created mindlabels and their childlabels.
So I thought of binding a list(Of textbox) to a textbox. But how can this be done?
Here is the code I have so far for the application:
Public Class Main
#Region "Methods"
Private WithEvents labelMap As TextBox
[Code]....
I have a module where i have specified the connection string as below:
Public Function Connection() As String
Return "Data Source=192.168.0.1,1433;Network Library=DBMSSOCN;Initial Catalog=test;User ID=sa;Password=123456"
End Function
Then i have a form which has two textboxes. What i am trying to do is bind the two textboxes to a dataset in the following way:
Imports System.Data.SqlClient
Public Class Form1
Inherits System.Windows.Forms.Form
[Code]....
I'm trying to get bind a textbox text property to an observable collection, and report changes back to the collection. The ContactLog property gets set from the calling page.[code]....
View 1 RepliesIve already created a connection to my database and by using databinding can retrieve data from the database and display it in a textbox. However i want to keep updating the same textbox at certain times, such as when a button if clicked, with different data but once i try to overwrite the text in the textbox i get this error message. [code]...
View 5 RepliesMe.StuDetComboBox.DataSource = StudentsDet.BindingSource
Me.StuDetComboBox.DisplayMember = "StuName"
ComboBox Bind Programatically Like Above Right ?
I have a bindinglist. i am using a textbox to show its itemsWithEvents xBind As New BindingList(Of Emp)
I added items this way
xBind.Add(New emp("alpha0", "B"))
xBind.Add(New emp("alpha1", "B"))
[code].....
I was thinking I should just change the value to "" when a null value has been read from the datasoure. But then I thought maybe there is a property that allows this. is there?
txtComments.DataBindings.Add("Text", rowEquipItem, "Comment")
my code below doesn't work Private Sub DataGridView2_CellContentClick_1(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs)
[Code]...
i have a form issue and return form. where Issuer_ID is the primary key, this form uses for boht emp and for student issuing book. at run time the user has to select a radio button for student or for employe. if he select student so after entering the full information when he press submit button so student query is execute and data stored in database, keeping the Employee field null, and when user select the employee radio button and after pressing the submit button, so employee querry executes and stores data in employee field, keep the student filed null. remmber and Student ID and Employee ID or foreign keys in isuee and return table and radiobuttons are not the part of database, its just on form.
now i want that when a user gives his issuer ID and at the lost focus event of issuer id, it is checked that if the record exists so the data is bind on the form, if does not exist so the user has to make entry, but if the data loads on form so how user will find out that this data is of student or of employee?
I was wondering if there is any way to bind TWO different database tables to ONE textbox in VB? I've spent the whole day going through tutorials and different webpages and I've found nothing at all on this...
Well let me try to explain what I want to do exactly: basically I have multiple buttons on 'Form 1' and a textbox on 'Form 2' asking the user to insert a value which will then go to an Access database. But here is where it gets tricky for me: IF the user presses Button 1, the Value inserted on Form 2 will go to a field in the database whereas if the user presses Button 2 to open Form 2, then the value will go to somewhere else and so on.
This would be easy to do if I was to create multiple forms or multiple textboxes, 1 for each button but what I really need is 1 form/1 textbox that would work for all of them... [URL]
i want to read the data from the table to textbo.below is my code when i try to run it it shows the error following are error.IndexOutOfRangeException was Unhandled
Make sure that the max row on a list is is less than list size...
below is the code
[Code]...
I am new in VB.NET 2008. how can programmatically bind a textBox to a BindingSource? As I could do that in Vb6 using Adodc in the ff code.
[Code]...
I have a DataGridView where we select a line and a new form appears so I can change the data.g:
edit.txtQtd1.Text = DGV.CurrentRow.Cells(6).Value.ToString
edit.txtProd1.Text = DGV.CurrentRow.Cells(7).Value.ToString
The data is loaded from that line to textbox's. everything goes fine, but when I edit the
[code].....
Given the following code I get error
"Cannot bind to the property or column rname on the DataSource"
Public Class CustomerUpdFrm
Private RowPassed As DataGridViewRow = New DataGridViewRow ' Passed row variable
Private Sub CustomerUpdFrm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
[cODE].....
I created a table in mySql named 'user' where fields are:
UserID,UserFirstName,UserMidName,UserLastName,Username,UserType,AcctPassword,DateCreated, DatLastModified and IsDeleted.
[code].....
I want to bind a column of my database to my textbox's Auto Complete source.now I want to know How to do that?
View 11 RepliesI have a application based on the entity framework. I have extended one of the classes (Quotes) wit 'partial class', and within that i've created a method that is completely independant of any database properties. For simplicity lets say it looks like this:
[code]...
All is good, except i need to bind this to my a textbox in my UI and have the textbox update automatically when the property is changed (like a dependency property). This is proving problamatic, I've tried both invoking the onPropertyChanged sub that the entity framwork exposes and implementing intoifychanged. Both cause errors.
see i have a form in that i have following controls
.combobox
.textbox
.listview
the combobox contains all the column names of listview like docid,firstname,surname etc
when the form is loaded the listview is populated with some data from the database.
is there is anyway to autopopulate the listview control based on search term entered on the textbox.i heard about the "onchange event",but i'm not sure how it works .
First I have 2 tables, for example Customer and Orders, and in the database there is a foreign key relation between both. For clarity Orders have a foreign key field to the primary key of Customers, thus Customer is the parent and Orders is the child table of the relation. My application is a Windows Form application, and I add a dataset to the project, in which I drop the 2 tables, and the relations between the 2 tables is automatic added. Now I will om a form loop through the Orders table (witch is the Child table) and show in a textbox some fields of the Orders table and also the Name field of the related record of the customers table. Regarding binding a textbox fo a Orders field I do it this way,
Dim myDs As New DataSet1
Dim myAdpCustomer As New DataSet1TableAdapters.CustomerTableAdapter
Dim myAdpOrders As New DataSet1TableAdapters.OrdersTableAdapter
myAdpCustomer.Fill(myDs.Customers)
myAdpOrders.Fill(myDs.Orders)
Dim myBindingSource As New BindingSource
myBindingSource.DataSource = myDs.Orders
myBindingNavigator.BindingSource = myBindingSource
TextBox1.DataBindings.Add("Text", myBindingSource, myDs.Orders.OrderIDColumn.ColumnName)
But now I can't find how to bind a textbox to a field of the Customers table witch is the Parent table of the relation.
I have a form called studentForm which has a studentCombobox, studentTextbox and a studentDatagridView
In the constructor of the studentForm I need to bind studentCombobox to the StudentbindingSource of the main form and to bind studentDataGridView to appropriate binding source in the mainForm.So that this datagrid view displays all the bookings for the studentID currently selected in studentComboBox
studentComboBox.DataSource = MainForm.StudentBindingSource
studentComboBox.DisplayMember = "StudentID"
studentDataGridView.DataSource = MainForm.StudentDataSet
studentDataGridView.DataMember = "Names "
This is the code I wrote in the constructor
this is the code for a textbox event:Private Sub TextBox1_KeyDown(ByVal sender As ObjectByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDowni have 120 textboxes and i want 1 event for any of them to have a keydown. is there a way to change the ending of the sub after handles to include all textboxes on the form?
View 4 RepliesThis is one of those "seems obvious" as how to do, but came across interesting side effect in implementing. I'm trying to keep two text boxes syncronized when information is updated. In this example, I will be using txtStartDate and txtEndDate. If the txtStartDate is changed, then the txtEndDate should should be updated. Likewise, if the txtEndDate changes, I want the txtSartDate to be updated. The side effect I'm comming across is that when I set them up under the TextChanged event for both, the events seem to retrigger against each other indefinately (endless loop?). Am I using the wrong event? Is this a task for a delegate?
View 3 RepliesI am trying to do implement an autocomplete textbox in my application and I have a question about keypress event inside an autocomplete textbox. I have 2 textbox namely textbox1 and textbox2. Suppose to be, when the user pressed the RETURN / ENTER key, it will focus on textbox2. how come that on this event is not triggering.
Code:
Private Sub frmCheck_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'set autocomplete mode in textbox1
TextBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend
TextBox1.AutoCompleteSource = AutoCompleteSource.CustomSource
[Code] .....
Also, I would like to ask if how to validate the input if the value from the textbox matches from the autocomplete values. How can I compare the values of the textbox and the autocomplete source?
I'm using a textbox to define a hotkey, and I need to make the textbox receive key events and prevent the form from receiving them.The reason it's a problem is because Tab (and probably other keys) is a valid key, but the form uses that as a shortcut, so the textbox never receives the keypress.
View 5 RepliesI am trying to bind my SQL param's qurey to bind to a table. My problem is i get this error "Fill: SelectCommand.Connection property has not been initialized."
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
If RadioButton3.Checked = True Then
Dim connectionGrid As SqlConnection = New SqlConnection("Data Source=BST;Initial Catalog=dsfs;uid=dfsdf; pwd='dsfsf'")
Dim commandgrid As SqlCommand = New SqlCommand()
[code]....