VS 02/03 Primary Key Field In The Form
Jul 13, 2009
I am using VB Dot Net 2003, Frame Work Version 1.0. The backend is SQL 2000. In the Backend, there is a table with a Primary Key Column. I created a Windows Application using Dot Net. I added a form using the Wizard, connected to the SQL server, selected the said table. The dot net created the form, data connection, data adapter, data set, many fields (as many columns in the table), and the buttons Add, Update, Delete, Load, Cancel and Cancell All. I ran the form and it worked properly when I hit the Load Button. It retrieved the data from the backend. I unloaded the form and re-run the form. This time, I clicked on Add. The Primary Key field was filled with the value 0. I entered the other values and saved the form. It saved the data. In the backend the PK field (as it had the Auto-seed) was filled with a relevant data. But, the front end was not correspondingly updated.
I checked the Update Command / Insert Command of the data adapter. They use the Select statement at the end with a @@Identity in the Where Clause.
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Mar 8, 2010
Ok i have 3 tables in a dataset
Table1 contains items for sale (referenced)
Table2 contains Stores (Parent)
Table3 Contains items in a particular store (Child)
the problem is the data in this case. Table 2 contains a StoreId field as a primary key. Table1 Contains an ItemId field. My problem is in table 3 this contains 3 fields, StoreId, Name and Quantity.
Now my Table1 contains a field called Name and one called PluralName, I need to determine which field in table one relates to the Name field in table3.
The following 2 constraints exist currently in my app
Table2 - StoreId (one) to Table3 - StoreId (many)
Table1 - Name (one) to Table3 - Name (one)
can i add another constraint :- Table1 - PluralName (one) to Table3 - Name (one) ???
I am presuming if i do i will get a constraint error as the property does not relate on a one to one level if the store has more than one item in stock and vice versa when it has only one in stock.
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Mar 3, 2010
I have been working on a web based report from an existing client/server apps mssql database. I have a working query, that pulls this information together from many tables, and can provide the query and a result set if necessary.
The results currently are similar to this.
ID | Name1 | Date1 | Veh | PO | Stops
_________________________________________
1 | Bob 1 | 12/1 | Car | 1234 | 4
2 | Sam | 12/3 | Car2 | 2245 | 3
2 | Joe | 12/4 | Van1 | 5568 | 2
[Code]....
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Apr 15, 2009
I am having major problems with creating my tables and populating them.The problem for the creating seems to lie when I try to create my table named WeeklyUnitStaffRota. I get the run time error 2147467259(80004005) No unique index found for the referenced field of the primary table. This has only started happening as I have been tinkering with my tables to get them to populate properly.I seem to have a problem when I have two columns with the same info but relating to a different college ie two MSC being run at 2 different colleges.[code]...
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Jul 13, 2010
I have made several posts on here lately regarding master/detail or parent/child data setups but no one has been able to help. It seems like a subject people don't like to tackle BUT I really need help.
I'm having a real hard with the DataView.RowFilter functionality and it is driving me insane.
For the most part, I have the basic master/detail functionality working. When you select a record in the first grid, it shows the correct data in the second grid. When you enter a record in the first grid, you can enter related data in the second grid. I accomplish this by using a dataview and row filter bound to the 2nd grid. When you change the record in the first grid, the rowfilter for the 2nd grid is restated and reapplied.
The problem arises when I overwrite the primary field value in the first grid and the detail records become orphaned. You would think all I have to do is change the ID in the 2nd grid to match the new ID in the 1st grid but this is where I am having problems. I wrote a loop to change the ID of each record currently loaded in the 2nd grid to match the newly changed ID in the first grid. The code is here:
Code:
Dim I As Integer
For I = AuthorizationGroupsDGV.Rows.Count - 2 To 0 Step -1
AuthorizationGroupsDGV.Rows(I).Cells(0).Value = StrEmployeeID
Next
I have used this code before and it works great. It has to step backwards through the grid because when the ID's are changed, they no longer match the RowFilter criteria and they disappear from the grid. They still exist in the dataset. The problem is, while the code "works" the intended effect does not. Some of the records completely disappear from the dataset and do not reload when I restate the row filter against the new ID number.
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Aug 23, 2011
On a client i have an anonymous list containing a multi-column primary key previously selected from the DB.Then i need to select all the records from the DB that equals the primary key list i have stored in the memory.[code]
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Mar 2, 2012
How i can import row from TABLE1 to TABLE2 without primary keyfield or adding correct value to primary key
i tried with two different codes, but result is same, it says: "In the column "Key"a constraint on the uniqueness.[code]...
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Apr 9, 2010
when i will enter form no. in the text box this should check the on the lost focus event either this form no. is already exsist or not.if exist show msgbox?
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Jan 30, 2009
I've created the beginnings of my new web application, but I am often coming up against the issue that ASP.NET renames elements IDs or in the case of form fields, their names.I have a form which is basically a sales system. It is essentially made up of two User Controls, one is a form for Customer Details (name, address etc) and the second is a form for the customer's purchases, it consists of a number lines dynamically created by Javascript created as you list the items the customer is purchasing. Both these sections are User Controls because they are to be used for other areas of the system where this data will need to be recalled/re-entered.When the USer Control is loaded, the field which contains the Customers' Name is renamed "m$mainContent$customerForm$name" I understand where this comes from, "m" is the ID of my Master Page, "mainContent" is the main Content Placeholder and "customerForm" is the name of the User Control.
In fact, in my case, this will always remain the same on all forms, so it is relative easy to overcome... but... suppose it wasn'tI can see there are ways I could deal with this with Javascript, but the form doesn't need an AJAX submit, a normal Post will do fine for this, so when I open up the recieving page I want to call Request.Form("name")% to save the customer's name into the database, but of course I really need Request.Form("m$mainContent$customerForm $name")%How would I dynamically extract those prefixes from the posting form to ensure that if I rename anything or use it in a different scenario, the problem will not break it?I am using .NET 2.0, so can't use Static Client.
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Nov 28, 2011
I've created the beginnings of my new web application, but I am often coming up against the issue that ASP.NET renames elements IDs or in the case of form fields, their names.I have a form which is basically a sales system. It is essentially made up of two User Controls, one is a form for Customer Details (name, address etc) and the second is a form for the customer's purchases, it consists of a number lines dynamically created by Javascript created as you list the items the customer is purchasing. Both these sections are User Controls because they are to be used for other areas of the system where this data will need to be recalled/re-entered.
When the USer Control is loaded, the field which contains the Customers' Name is renamed "m$mainContent$customerForm$name" I understand where this comes from, "m" is the ID of my Master Page, "mainContent" is the main Content Placeholder and "customerForm" is the name of the User Control.In fact, in my case, this will always remain the same on all forms, so it is relative easy to overcome... but... suppose it wasn't I can see there are ways I could deal with this with Javascript, but the form doesn't need an AJAX submit, a normal Post will do fine for this, so when I open up the recieving page I want to call Request.Form("name")% to save the customer's name into the database, but of course I really need Request.Form("m$mainContent$customerForm$name")% How would I dynamically extract those prefixes from the posting form to ensure that if I rename anything or use it in a different scenario, the problem will not break it?
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Jun 19, 2009
i have a field on my form that gives me a real headache. when i try my form, i push "TAB" to go from 1 field to the next. when i hit the nightmarish field, my program hangs. i cannot get out of the field and i cannot even close the program. i need to go to taskman and kill it to close it.
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Sep 23, 2009
So I have the following VB.NET code that creates a form field in a PDF using SyncFusion's Essential PDF module:
Dim pdfField As New Pdf.Interactive.PdfTextBoxField(pdfDoc.Pages(iPage), "txt1")
pdfField.Location = New PointF(50, 50)
pdfField.Size = New SizeF(100, 10)
pdfDoc.Form.Fields.Add(pdfField)
This works great except for one thing. When I open up the PDF in Acrobat and look at the field name I notice that it says "txt1-0". Now I can't figure out where the "-0" is coming from and how to get rid of it.
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May 4, 2012
This seems like I only need a line or two of code? This is what I need to do:
Add data validation to the new phone field on the Contact Us form. We would only accept phones with the following format: 995-999-9999 Complete the contact us form so that you can submit it as an email. Send all your test emails to blah@boo.net. You can use any email account you have to send the email.
[Code]...
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Nov 5, 2010
Add data validation to the new phone field on the Contact Us form. Wewould only accept phones with the following format: 995-999-9999Complete the contact us form so that you can submit it as an email. Send all your test emails to blah@boo.net. You can use any email account you have to send the email.
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Nov 28, 2011
I've got a question about attachment field (as OLE object/attachment) in Access Database and Visual Basic 2010. I would like to know, is there a possibility to use attachment field in the same way, in VB like in Access Database? What I want to do, is to make an application (connected to Access Database) for users from my company, that will allow them to open "Registration Form" and fill all required fields, and also add PowerPoint Presentation as attachment.
What is most important, I would like to have an access to this presentation.
Project Path:
Employee opens Application/Window Form --> Fill all required fields + attachment field --> I have access to the presentation from Access Database/or another Window Form (I can Open/Edit/Change the presentation)
So, what I would like to have - Window Form with attachment as icon, but after upload (by employee/other person) it has to be in the database.
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Mar 11, 2010
I have create a database program in vb, with 3 forms, on the second form, I have populated it with fields from 'databaseDataSet'.
Basically my question to you is that I want to create a search field at the top of this form that when the user inputs a query, it searches through the last name field and goes to the matching record.
[URL]
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May 29, 2009
I'm using VB 2008 with .Net 3.5 and I want to check that a combo box has a selected value greater than 0 (default = Nothing Selected) before allowing the user to move off the tab page to another tab page. The Leave event does not allow me to cancel and the Validating event on the tab page does not fire unless the user has at least visited the combo box field.
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Nov 23, 2009
I have a VB 2008 windows application that I'm working on; the data are stored in SQL. I have a lot of fields that user will need to fill out. Some fields that not displayed on the form are actual combination of few filled out fields. For example - user types in first name, middle name and last name in 3 separate boxes on the form and I'd like to combine those and assign it to the "FullName" field. I know it's duplicating the data but this FullName field would need to be merged into report as is in a different program.
Another example - user will pick a data in combo box that is binded to a different table, but I need it to auto-populate 3 fields in the main form (those fields are not displayed). I know that I can actually add all those hidden fields on the form and assign calculated values based on user input and then everything is saved with built-in "Update" command. I was wondering if there is a way to specify those few calculated values as parameters and still use "Update" command without actually typing long Update command. I have over 400 fields - very lengthy command.
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Jul 18, 2012
want to inset a field on vb form with texboxe besides it such that when i inset values a polygon is drawn.
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Oct 16, 2009
I have a field in my db that stores the path to a picture that will be printed on the report C:Picturespic1.jpg). When I add the field to a input form, I want to allow the user to hit a browse button to select the path and picture name and then store that selection in the field. How do I set up the field on the form so they can do this? I am using VS2008.
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Apr 14, 2010
In the past, I used the code below to fill out a form field using the webbrowser control in VB.Net. The page I am working with doesn't have name field for the inputbox, so my code doesn't work. How would I fill out the input box defined at the bottom of this post in bold?[code]...
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Jun 15, 2010
Select All Text In A Form Field On tab in vb
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Jan 20, 2010
I am able to load a dataset with records from a sql database. I then loop through the data using a for loop, this works fine. As part of the loop I would like to update the contents of a textBox.text property. The problem is that it will only update the text field when the loop is complete. How can I update the text content for each record in the loop? I hope this makes since.
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Oct 24, 2010
I have a field on my form for Check Number if a bill was paid by check, if not it should be blank. When I run the query in Access it returns the right records.the query loads all current customers, 99 out of a possible 107, when I navigate through the records as soon as I hit one where a Check was used, the Check Number field stays filled in for all records displayed after.
vb.net
If Not dsForm.Tables(0).Rows(dbCursor).Item(1) Is DBNull.Value Then
Me.txtRentalID.Text = CStr(dsForm.Tables(0).Rows(dbCursor).Item(1))
Me.intRentalID = CInt(Me.txtRentalID.Text.Trim.ToString)
[code]....
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Jan 1, 2011
What i want to do is not allow the entering of the same thing in the same field that has already be used. eg. field(entry) 1 is already in the database. So when trying to enter 1 and field(entry) anymore it will give error msg and make change before saving.
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Oct 15, 2009
I've been working on this for some time and I'm surprised that no one else has had this problem. I have a databound form with multiple date fields. I cannot delete a date field once it has been populated. I can change the date, but that is about it. Once Clearing the field i cannot lose focus of the textbox or even close the form. I have read one article on this but it does not seem to be working. The below code I have found. how to get the field to allow nulls? This is not an issue with the table not allowing nulls either.
[Code]...
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Jun 4, 2011
I have an array set up to receive the names of forms when they open. The form name is sent as a Form not a String therefore when I run my code I cannot check for whether the field is empty in the normal way (ie. array(1) = "") as the "" are only usable with strings!
Dim Forms(24) As Form
Dim i As Integer
Dim Free As Integer = -1
[CODE]...
I only need a solution to do the same as array(1)="" but for windows forms.
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Sep 25, 2009
I have created my own virtural keyboard for a touch screen interface. I used two forms,one for the main program and one for my keyboard so the keyboard will have opacity of 90%.in my main program form's login screen, i have two textboxs, one for username one for password. the password is a textbox with UseSystemPasswordChar property set to True.I used the technique descripted here: How to: Simulate Mouse and Keyboard Events in Code to send a keycode to different form window.
1. get window handler using FindWindow()
2. set main program form as focused window by SetForgoundWindow()
3. then sendkeys.send(keycodes)
it worked perfectly when i try to input letters to the username by the virtual keyboard, but it not really working for the password textbox.Strange when i set the password textbox 's UseSystemPasswordChar to False again it worked. if i put my virtual keyboard as one of the controls of my main program form it also works but i then don't have the opacity property for my keyboard. of course, in this case the Findwindow() and setforgroundwindow() is not needed.
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Jan 18, 2011
I have a form and stored procedure that inserts the data from the form. It works fine except that if a field isn't filled in it doesn't insert a NULL into SQL it inserts "".
I've tried a few different ways but none seem to insert NULL, the one below still inserts "", can anyone point me in the right direction?
Here is the required part of the code, if you require more just let me know.
Dim rdr As SqlDataReader
Dim cmdInsert As SqlCommand = New SqlCommand()
cmdInsert.CommandText = "spPersonalDetailsInsert"
[Code].....
So if I enter nothing into address1 field it should write NULL to screen but it always writes NOT NULL. What does an empty form field equal? in classic ASP it was always "".
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Jun 18, 2012
I got a Mysql sql database for my project. The id field is set as auto increment, which seems to function correctly. But on the form in my text field and datagrid i see a negative number, while in the database its a postitive number. I do not really plan to use the id field right now, but when i do it might cause some problems.
Anybody know why it would show as a negative number on the form(textbox/gridview) and as a positive in the actual database?
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