how to add sql statement in my code..here's my code for the form load..[code] want those textboxes to displayed only data for a particular person something like "Select * from Staffapplication where MID ='" & frmLeave.txtUser.Text & "'")how to add the sql statement in my code??
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Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
[CODE]...
The problem, The INSERT statement works fine in the form load but not in the button click event?
I was convinced that If <expression> Then <statement [:statement]> Else [statements] in concrete form of If a = b Then SayHello() Else SayBye() End has sense. I read article on msdn on If-then-else, but I forgot why I was reading, so I concluded, that snippet above means this
If a = b Then HelloIsSaid : IsNotEnded Else ByeIsSaid : IsEnded But I have tested it now, and I see, that Else without statement is nothing more than decoration. It would be pretty good if it had function I described. Do you think its good request? Or do you know any circumstance where this Else has some function?
y friend and I are re-learning Visual Basic, and we are stumped on this bit of code.
For intAsterisks As Integer = 0 To intLine - 1
lblAsterisks.Text = lblAsterisks.Text + "*"
Next
I have the following SQL:
[Code]...
I want to put it (the select count statement) in this LINQ statement so I can get the sales count in my linq statement: Dim TheLeads = (From L In DB.Leads Where L.IsDeleted = False Select L).ToList() Is this possible to do in LINQ?
I have a list of strings. How do I bind it to a listbox so that the listbox updates as the data of the list changes? I'm using vb.net.I've tried this so far. I've manage to display the data, but not change it:
Public Class Form1
Private mycountries As New List(Of String)
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code]....
I've also tried this:
ListBox1.DataBindings.Add("items", mycountries, "Item")
But items is readonly, so it doesn't work.Also, if I want to bind the enabled property of a button to a boolean, how can I do that?I've tried this but I don't know what to add for the last parameter.
Dim b As Boolean = True
Button3.DataBindings.Add("Enabled", b, "")
add an if statement and an exit statement to my do loop that exits when my future value (FV) is greater than 1000, then to change the exit statement to a continue statement so my loop will continue even though my fv is greater then 1000, point is to get this to run even though my if statement doesnt do anything. problem something wrong in my code and an exception error (xception of type 'System.OverflowException' occurred in mscorlib.dll)
so can someone show me where or why I have an error is, what am I overthinking now! I could use a hint, OMG i could use a tutor for that matter
[Code]...
A co-worker wants to convert the following IfThenElseIf statement into a Select Case statement.
Explain why this is not possible.
If temperature = 100 Then
X = 0
ElseIf population > 1000 Then
X = 1
ElseIf rate < .1 Then
X = -1
End If
I cant get this SQL statement to insert any of the values in the form to add to the database
sql
sql = "INSERT INTO prevresults (ExamDate, ExamTime, CorrectAnswers, PassPercentage) VALUES (date.now, time.now, rightanswers, percentage.text)"
[code]....
I have an ASP.NET page with a Wizard control containing several steps and about 80 form fields. The data is collected and inserted to a database from the code behind page. I need to set this form up so you can not only insert, but edit a record as well. So I want to databind the fields. I'd rather not use a FormView because then I would have to revise my existing code, since you can't access controls inside a FormView directly. Is there a way to databind the fields without using a FormView?
View 1 RepliesI have a button that i basically want to either show or hide it based on if a certain string has a value or not. I create the buttons in code so i was trying to used databindings with a converter but i can't seem to get the converter on the binding after the value changes. I'm not sure if I'm going after this correctly or not... Here is what i have for creating the button and the binding and the converter. "sFileLocation" is a string inside my class "QuestionsFile". This works for initialization but its just when the value of the string changes, this binding doesn't see the change and doesn't run the converter and all that for me...
Dim btn2 As New Button
Dim b2 As New Binding("sFileLocation")
b2.Mode = BindingMode.TwoWay
[code]....
The thing I don't understand too is that the binding works fine if i just binding the property to the Button.Content. So the property is updating correctly when it gets changed, and the buttons content changes accordingly.
I'm trying to do something with databinding between 2 controls...Here is a sample code (that doesnt work - and that is my wonder):
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Me.TextboxPlus2.DataBindings.Add("Text", Me.TextboxPlus1, "Text")
[code]...
Is there a way to fill a checked list box with data from a sql table and then use the checked items as parameters or a stored procedure?
View 5 RepliesI have an ASP.NET page with a Wizard control containing several steps and about 80 form fields. The data is collected and inserted to a database from the code behind page. I need to set this form up so you can not only insert, but edit a record as well. So I want to databind the fields. I'd rather not use a FormView because then I would have to revise my existing code, since you can't access controls inside a FormView directly. Is there a way to databind the fields without using a FormView? I'm new at this by the way so sorry if the answer should be obvi
View 3 RepliesI want to databind my catagory table to a dropdown list but thecategories aren't going to be in order like:
categoryID Name---------------------1-----------apple2-----------wiper blades3-----------band aids4-----------pear5-----------raisons6-----------tiresHow would I be able to make the list look like:
[code].....
I would like to databind to a property that requires arguments.
I thought about defining custom columns and cells because the parameters that the property requires are available from the within the object bound to the row, but I'm having trouble materialising this idea.
As an additional problem, that I think leads on from this, I have also created a custom column and cell for the datagridview that takes the implementation of an interface during it's construction. I have added this column to the datagrid view programmatically (passing the Interface implementation to the column constructor). I've overridden the paint method which evaluates a property from the Interface implantation using arguments from the other rows in the column, but it doesn't seem to call the paint method at all. Even on DataGridView.Refresh(). Essentially I would like this column to also update, evaluate a property from the interface implentation using arguments from the underlying object bound to the row and print this number in the cell.
The reason for this second problem is so that I can implement the interface many different times and just at a column dynamically to display it's evaluation.
Is it better to perform data access operations on the page and then populate the properties of each usercontrol with the retrieved data. Is it better if each UC calls the business layer and pulls its own data independently without having to depend on the page.Existing Conditions:
1. Any information (Querystring, URL, etc) that the page would use for data access is also available to the individual UC's
2. Both solutions utilize caching.
My coworker insists that the first option is better since Data access only happens once on the page. The second option seems more logical to me since it will allow me to place the UC on another page without the need for any additional wiring on the page itself. The page and the UC are truly decoupled.
In this example the IsEnabled property of my button is bound to the selected rows "Local" property of the grid and it works just fine:
<Button DockPanel.Dock="Bottom" Width="100" Height="100" IsEnabled="{Binding ElementName=dataGridRestore , Path=SelectedItem.Local}"></Button>
<my:DataGrid x:Name="dataGridRestore"
ItemsSource="{Binding}"
[Code]...
I am trying to get some binding code working. Bascially I want to bind the IsEnabled property of an element of my grid's context menu with a value of the selected row in the grid.I have it working with this:
<my:DataGrid.ContextMenu>
<ContextMenu DataContext="{Binding PlacementTarget.SelectedItem, RelativeSource={RelativeSource Self}}">
[code].....
I have 2 tables with relation from parent table (customers) and child table (orders) and i have all inside typed dataset.
Now i want a field of customers by datarelation from field child table.
Inside child table i have IDCustomers and i want Customers.FirstName
I think so, inside databinding form designer, inside Text i write
dsMaster.Orders.CustomersOrders.FirstName
I have been developing this VB application for some time now in Visual Studio 2008. I have created datasets, ran into problems, reinstalled them, etc. and have been able to resume work with my application. Just recently, the datasets have completely stopped working meaning no data is pulled from the SQL server. I have tried recreating the datasets with no luck. When I create a new label and try to simply associate it to a SQL field through the properties of the label, Databindings... Text (to pull in the value of the field to this label), when I run the program, it does not pull the data. None of the datasets work. I have checked the code and designer and tried to compare it to my old version and everything looks fine.
View 4 RepliesHow to bind data from database to combobox of winform in VB.NET .
Database : MSSQL server managemant studio
Front End : Vb.net 2008
In the combo box binding,i need to put "Product_gid" in index and "Product_Name" in the value of combo box.How do i add an item "Select" in the 0'th position of Combo box,So that every time i opened the list of combo box,the 1st item will be "Select",other from database.
I have a table called Sort with columnds sortID and sortname. I'm displaying my results in a datalist. I also have a table called Colors with colorid, sortId and shade. On my display I am selecting the results from the Colors table. But for the
SortId column I just have a number. Each sortId already has a sortname in the database. How do I get it so that the display page displays the sortname rather than its corresponding sortId name. Here is what I have: Sincerely, Computergyrl
I have the following code; now i set a propertygrid.selectedobject to the Square object, and start changing the Squares properties. If i change the [Position.x] or [position.y] values in the propertygrid the [Position] and [center] properties update correctly, however when i change the [Center] property, neither [Position] or [Position.x] or [Position.y] update. Is there something else i must do to get this to work both ways. Maybe something is lacking in PointFConverter?
Imports System
Imports System.Collections
Imports System.Drawing
[code]....
I have two datatables inside a single dataset (all are typed). dtOriginalData contains roughly 25 or so fields, which included IDs, descriptions and other bits of data. The ID is the PKey in this case. dtEditData contains almost the same columns as the first,with a couple of extras thrown in. One of the fields in dtEditData is the ID from dtOriginalDatafter the two tables are loaded, I create a datarelation between the two using this ID field. I then update some of the fields in the dtEditData and set their expression to pull data from the Parent table (dtOriginalData) ... this is then fed to a grid. So far everythign works fineNow I need to add some functionality, displaying the Original Data, the Edited Data and the variances between the two.
The bindingContext is set cocrrectly. I've successfully bound all of the edited fields to their appropriate labels, and everything updates as I scroll through the data in the grid.It's all fine and dandy... except.... for the Original Data fields... I bound them to dtOriginalData.... and all I get is the first record displaying. It's not taking into consideration the relation between the two databases and advancing the index on it. So, what I need to find out, is if there is a way to do the databindings so that the two data tables will move in synch with each other, keeping the displayed values updated with the correct information. If, for some reason I can't find a way, I may have to resort to a gawd awful datatable with 30+ fields in it.
I have a class:
<Serializable()> Public Class data
Public _needleCount As Integer = 1
Public percent As Double = 100.0
Public table As DataTable
Public part As String = ""
[Code]...
noticed the strange behavior of Databinding to ToolstripComboBox.Combobox when it is being added to ToolstripDropdown or Contextmenu. Normally I'm binding SQL data to ToolstripcomboBox.Combobox by following code.[code]Though it works perfect on ToolstripcomboBox(es) on ToolStrip or MenuStrip, failed on ToolStripSpiltButton (or) ToolStripDropdown (or) Contextmenu.
View 4 RepliesI have two combobox, cmbCountry and cmbLocationI have dataset with 3 table, first table for Country value, second table with Location value and then I have table Apartments with IDCountry and IDLocation.I have 2 datarelation, ApartmentCountry, ApartmentLocationThen I bind the last table with cmbCountry and cmbLocation
View 2 RepliesI am trying to follow an example. I'm getting the following errors:
1. PartNum is not a member of 'Vantage2.OMSDataContext.
2. Name 'Where' is not declared.
3. Method arguments must be enclosed in parenthesis.
4. Name 'p' is not declared.
5. Comma, ')', or a valid expression continuation expected.
For reference, the link is here: [URL]
I have followed with my code as follows...
Class Window1
Private db As New OMSDataContext
Private View As BindingListCollectionView
Private Sub Window1_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
[Code] .....
Does anyone know how to duplicate the winforms databinding function - format in wpf? e.g. applying the format of #####0.00 to a text box?
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