binding navigators, datagrid view, binding source are all sql database parts.Will these parts still work if you havent got sql on you pc and your not using an database file (.log and .mfd) and your not coding to them, im using MS Jet/Oledb to code to Excel.What not to put on an Employee evaluation: This employee has hit rock bottom and shows signs of starting to dig.
View 2 Repliesis there any way that i could link/bind multiple binding source to only one binding source navigator?
View 4 RepliesI am working on a group project in vb.net, in which all my team members are working on individual tables of a database. All of us are using binding navigator,where the GUI is created by drag and drop from the table.
Is it possible to attach all these pieces together with imports or references? Will the changes made to the database while working on the program like table adapter can create problem? Do I need to make all those changes in database before importing ?
Using Binding Navigators to tables in datasets. How are you all managing putting default values into new records? How are you handling "general" row validation before allowing them to save the record? We actually save on the current change event of the BN right now - client does not want to use a save button. But still how would you "stop" the current change from happening if the record was not yet valid enough (like filling a couple of foreign key fields)?
View 1 RepliesI have a client who needs a database to display products.He would like to have the product attributes in the rows headers and new records added to the columns. I have a collection of a class that would contain the products and am binding it as a data source. however all I can get is the attributes to show up in the columns and the records to show up in the rows.
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I have a microsoft database file i'm currently working with in a project. I have already added the data source and all seems to be going well. Quick question though? What I'm looking to do was, have a button called find, when I click it I want it to bring up an input box and use the text the user types in to search through my binding source of names, if it's there I need to display its record to the textbox and if it's not there I need to print out a messagebox saying its not there. I've been told I should trim the usersResponse and look through the binding source table to see if it exists then go from there, but i'm not sure how to do that.
Here's what I have so far:
Dim Message As String = "Enter the name to find."
Const Title As String = "Database Project - Find"
Const UserEnteredNullData As String = "No input for find."
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My question is, how would I go about searching through my binding source to see if it exists and how would I display it to the name text box?
I have an Access database and I want to view on a datagridview specific rows. For that I used the following :
CasesBindingSource.Filter =
"OfferDate Between #1/1/1997# And #12/31/1997#"
Cases is the table, OfferDate a field of the table wich is DateTime type.
When I use Between operator I get the following error :The expression contains unsupported operator 'Between'.
I'm trying to filter my access database and when I "search" by name, it works, but when I search by policy number it doesn't seem to work.
Here's my code:
If RadioButton3.Checked = True Then
Form3.Show()
Me.Close()
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wan to ask about anyone know the code about how to clear all the data inside the data grid view without clear the binding source...
View 1 RepliesI have a program that needs to generate a random 8 digit ID and check to see if it in the database before adding it to a new row.
At the moment I have the correct code for doing this, but I have it in the event handler Bindingsource.AddingNew. This event handler executes my code and THEN adds the new row. How can I get it to add then new row and THEN execute my code? Is there an event handler I can use to do this?
I found the same thread but it has never been answered. So I better to post a new one.
The problem is I added a new column in my table, I have a dataset linked to that table and a source of data of my datagridview.
Now, when I'm going to add a new column into my datagridview, I didn't find the new column which I added recently. Seems that the binding source is not updating whenever an update takes place.
I'm writing a order entry system and I'm using structures to pass information around various parts of the program for things like the order header (order date, customer name, etc).
In building the form I discovered that you could use a binding source between form controls and the struct which is great because it means alot less code on a form that will be very busy anyhow. Unfortunatly I'm either doing something wrong, or I've discovered a bug in vb.net because when you fill in a textbox and the binding source fires the setter for that attibute of the struct, it does one of two things. It either: Finds the struct that I assigned to the binding source then creates a new instance of it after it is done thus destroying any changes.Creates a new instance of the struct because it wants to rather than use the one I instructed.
I know this sounds confusing so I'm including a small program that demonstrates the problem I'm having.
Binding Master Table to TextBox and DateTimePicker and Binding Details Tables to Datagridview then Add / Update / Delete in both
View 8 RepliesHow can I modify this code to add a binding source to datagrid1.datasource
DataAdapter.Fill(ds, strFileName) ' Fills data grid..
DataGrid1.DataSource = ds.Tables(strFileName) ' ..according to data source
DataGrid1.AllowUserToOrderColumns = False ' Disallows sorting to keep it all straight
I'm creating a dataset (AddressDataset) that has 2 datatables - addreess and state.
Addrees: line varchar, state_id number
State: state_id number, state_name varchar
I've created a data relation between state id on these tables. I'm setting up to combo boxes: cboAddreess, and cboState. I'd like cboState to change to the correct value when address changes.
Dim dbSelCommand As OleDbCommand
Dim dbSelCommand2 As OleDbCommand
dbSelCommand = New OleDbCommand
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This gives me "address cannot be found in binding source".
I've got a somewhat sillier question this time. After I insert/update my data using SQLParameters, it wont refresh. I'm using the following code to refresh the binding source:
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First: I have a numericUpDown and a class that are bound.
Me.percent.DataBindings.Clear()Me.percent.DataBindings.Add("Value", options, "percent")When I change the numericUpDown the underlying class seems not to update. I have to click outside the numericUpDown to force validation and force syncing. This is very counterintuitive and will cause problems. How can I make sure the underlying data object gets the new value on valuechange rather than validate?
Second: After I change the numericUpDown I have an option that serializes the underlying data in an xml file. The underlying XML file does not always get the right data. To figure out what is happening I added a button that outputs the values of the underlying data object and it is always getting updated. In other words...the control and the object values always agree. The serialize
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I have a child form open (frmProfile) and when I click on the Search button on the Toolbar another form is loaded. On the search form is a few text boxes where the user can input different search functions (First Name, Client ID, Last Name, SSN, Male, Female, etc). Also on the form is one DataGridView.
What I need to do is:
1) After double clicking on a row in the dgv, it sends the clientid to the parent form (frmProfile). I actually have this working but looking for improvement.
2) I would like to then click on the Next button on my toolbar and it go to the next record in line.
At the moment, I only have 1 record that comes in out of 9500. Below is the code from the Search Form and the Profile form.
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I have my own toolbar with Add. Delete, Previous,Next etc. I disable some depending on the user so I am not interested in the BindingNavigator. What method is used for movenext in code?I could really use some help on this. I have spent way too much time so far but needing to learn the nuts an bolts of 2008
I'm currently working on a project where I want to ensure a user does not create a new record based on an ID (such as Customer ID) that already exists.If the record does exist, don;t create the new record and simply move the bidning source to the existing record and display that.What I'm currently doing within the Binding Navigator Add New Click event is checking if there is current data to save and prompting the user if they wish to save the changes before doing anything else.I then set a boolean variable called _NewRecord to true. Then within the lost focus event of the record ID, I have the following code:
Dim itemFound = -1
If _NewRecord Then
itemFound = GroupExists(txtGroupID.Text)[code]....
The code above works well, but I was thinking of doing this using the AddingNew event of the binding source instead to check for an existing record and simply cancel the new record addition then move to the existing record. However, I couldn't find any good examples of how I might do that or how to properly use the AddingNew event.good example of using the AddingNew Method as it looks like it might be useful to know for future projects.
Im having some wierd behavior on a bound form in vb.net 2008. I have setup a client form, with another tab that has contacts for that client. the contacts tab has a binding navigator at the bottom, so the user can move amongst the contacts. all fields on that form are bound to a bindingsource called bsContact, using a table adapter called "ContactTableAdapter"
if i have a contact already saved, and want to modify the contact info, the form binding doesn't seem to recognize that i have changed the value of a textbox on that contact.i would think that if a textbox is bound to a bindingsource, then if the value of that textbox changes, the bindingsource would know about it, but it doesn't. The dataset.HasChanges returns false, and my save wont happen. (see code)so, when i hit the movenext on the bindingnavigator, it changes to record 2...i change a value on a textbox...i hit the save button on my form....no update will happen.
Update: I noticed that if i am on the tab with the multiple contacts, and i change a textbox on the form, then i MOVE TO ANOTHER RECORD, then the dataset recognizes that there was a change, and the update happens. Why doesn't the textbox immediately notify the dataset that a change is happening?
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I'm using the following code to refresh my binding sources, but it doesn't appear to be working for my details view.[code]...
View 4 RepliesI can't get my binding source to update from a DataGridView
This is how I'm loading the dataset into the dgv:
vb.net Dim sFileName = filelocation & "Checks.xls"
Dim connectionStringTemplate As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0;HDR=Yes;IMEX=1"""
Dim connectionString As String = String.Format(connectionStringTemplate, sFileName)
Dim sqlSelect As String = "SELECT * FROM [Sheet1$];"
Dim workbook As DataSet = New DataSet()
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I have a form with a binding source bind to the invoice table. I want to generate invoice report when the user selects an invoice record from the datagridview and clicks generate report. What i want is
1. how can i set the report's source to the binding source
2. can i do this using the crystal report generating wizard
3. or what articles or sites you recommend me so as to do this
I need to know which is better in vb.net... BindingSource( such table adapter and etch..) or Hardcode( such as parameters,sqlcommand,sqlconnection that all your codes are programatically done)?..Which is Which?
View 2 RepliesI want to filter 2 columns in binding source o
1.- sucursal by watever is in textsucursal
2.- tipo has more then 7 valuyes..but i want to filter by only 4 the ones shown in query..[code]
The table field [recordaddeddate] is a Date/Time field in my Access database. Usually this field contains a date + time value. For filtering on my datagridview I want to filter on the date portion only. However the following genterates a 'The expression contains an unidentified function call DateValue' error. How can I filter on just the date?
DateSelected = DateValue(Me.AddedDateDateTimePicker.Value)
Me.ConversationTblBindingSource.Filter = "DateValue([recordaddeddate]) = #" & DateSelected & "#"
HIDoes anyone have code for filtering numbers in a binding source?
View 4 RepliesI want to create a binding source from a data gridView that i have that is connected to NorthWind database wit Mysql
View 5 RepliesI use the Add new button (of the Binding Navigator) to clear the text boxes for a new record, but then have a Update button on the form where I do an Insert query to SQL, which works because if I refresh the table in SQL the new row is there.However when I then use the Binding Navigator 'move previous' button I get an error saying "Column 'AllowOverbook' does not allow nulls. " - now this is a column that is defined in the database to have 'Allow Nulls' = False, but I do not display this field on my form because in this case it is not required.Instead I have it included on my Insert statement and just set it to '0'
Also when you look at the table every entry in the AllowOverbook column is '0' and there are no NULLS.
I am creating VB.NET Windows Application. I have Placed a Binding Navigator Control on Form and that is Binded with a BindingSource Object which has a Binding Source of a Data Table. I have Binded Two textBox with my Binding Source and I am able to Navigate in Records uisng Binding Navigator Object but when I made some change in my record and try to update that I my Database (SQL Server) it show an Error that "Update requires a valid UpdateCommand when passed DataRow collection with modified rows" where as I have defined DataAdapter.UpdateCommand and that is valid one. Below is the Code.
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