Is there a simple way that I can replace a foreign key in a datatable, with a corresponding value from the table that the key is referring to, without having to create a new table or use tableadapter? Ive got a table that has a foreign key to a child table, and I need to get a column from that table to fill a dataview?
View 4 RepliesI am displaying a table with a Report Viewer control. The table contains a foreign key to a child table, and I want to display the value from the child table for the particular foreign key.How do I do that? Using VB in vs2010.(Eg.The parent table contains a field called BrokerID, which is a key to the Brokers table.I want to display the value of BrokerName from the Brokers table associated with the BrokerID from in my Report).
View 3 RepliesI have an application where I need to be able to search for the workers related to a company from a contacts list. I am able to do this by entering the company number but I am unsure how I can set the query to allow to search for the information in the other table.
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SELECT RecordNo, CompanyID, AccntRep, CustNumber, Person, SubjectID, StatusID FROM dbo.Contact
WHERE CompanyID = @companyNo I think that I need to create a join in the SQL statement to the company table but am unsure how to go about this and I would be grateful if someone would give me a point in the right direction so that i can search for the company name instead of the companyID.
I'm trying to use a DataTable to get the schema of a SQL Server DB.But, when try to detect the ForeignKeys, the constraints collection only brings the UNIQUE constraints.
Private Sub ShowConstraints(ByVal tableName As String)
Dim table As DataTable = New DataTable(tableName)
Using connection As SqlConnection = New SqlConnection(GetConnectionString)
[code]....
How can I get the ForeignKey Constraints?
I have an Access database where I want to store the contacts in a company: In this database I have a table named "users" where I keep the users which will have access to the database. In the main table, named "contacts", two of my fields "insert_user" and "contact_user" refer to the user who entered the contact information and the user who actually made the contact. The way I am thinking it, I will have to set both of the fields as foreign keys to the same table/field, namely "users"/"username".
So:
I set two foreign key constrains in two different fields ("insert_user", "contact_user"), which refer to the same table/field ("users"/"username") in an
Access database, using VB.Net OleDB (See the SQL Statement below)
ALTER TABLE contacts ADD CONSTRAINT insert_user_foreignkey FOREIGN KEY (insert_user) REFERENCES users (username)
ALTER TABLE contacts ADD CONSTRAINT contact_user_foreignkey FOREIGN KEY (contact_user) REFERENCES users (username)
I open the database with MS-Access. I see that all the tables are fine (as they should be).
However when I click on relationships at Access I get all my tables plus a table named users_1 connected to "contacts"/"contact_user" (the table users is only connected to "contacts"/"insert_user")
It is very strange that in the Table View of Access I don't see this table, but only in the Relationships View.
Questions
Is my thinking right (to set 2 foreign keys, that refer to the same table/field)? What is this table "users_1"? Will my database work or am I doing something wrong?
For simplicity, I have a database with two tables, as follows:
/---------------------------------------
| Table Name: GRADES |
|---------------+---------+-------------|
| Column | Type | Comments |
|---------------|---------|-------------|
[code]....
On my form, I'm trying to display information about a grade. I'm using a DataSet with BindingSources and TableAdapters. Using the tip from here, I'm populating the selected grade's ID, HazardType_ID and Code. Unfortunately, I want to display the the HazardType, and not the foreign key index. I've accomplished this with the following
' get the data
Dim data As ProjectDataSet.GradesRow = DirectCast(GradesBindingSource.Current, DataRowView).Row
' fill in form fields
[code]....
Note, I'm using VB Express 2008 (.NET 3.5) and connecting to a MS Access database.
I want to insert data into my tables. Table 1 (Recipes1) has a primary key (Autonumber) Table 2 (Ingredients) has a Foreign key with the same name as the primary key in Table2 ("RecipeNumber) this is a normal number field. The problem is that when i update the tables, it does not even make it past table1 , which should be ok.
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I have 2 Tables , OrderDetails and Requests In my LINQ to SQL dbml file. OrderDetailsID is a foreign key in Requests Table.
I want to write the query to get the sum of UnitCost from OrderDetails based on OrderId. And If there is a row in Requests Table for each OrderDetailsID, and the Requests.Last.RequestType="Refund" I want to reduce the total refund amount from the main sum otherwise If there is no row based on OrderDetailsID, add to sum.
Here is the way I implement that. I am looking to prevent using "For each".
iRefund = (From od1 In dc.OrderDetails _
Where od1.OrderID =1 _
Select od1.UnitCost).Sum
[Code]....
I have 2 Tables , OrderDetails and Requests In my LINQ to SQL dbml file.OrderDetailsID is a foreign key in Requests Table.I want to write the query to get the sum of UnitCost from OrderDetails based on OrderId.And If there is a row in Requests Table for each rderDetailsID, and the Requests.Last.RequestType="Refund" I want to reduce the total refund amount from the main sum otherwise If there is no row based on OrderDetailsID, add to sum
View 3 RepliesI'm currently trying to create a function to parse error messages to make them more helpful for the end user. Currently I'm working with SQLServer and VB.NET.
Right now I'm raising error 547 which looks like this:
DELETE statement conflicted with COLUMN REFERENCE
constraint Constraint Name. The conflict occurred
in database 'Database Name', table 'Table Name',
[Code].....
I'm able to pull every piece of information I need from the error message except the name of the parentTable. I've already determined that the SqlException doesn't store the statement that caused the exception, and as far as I can tell it doesn't store information about the name of the parent table, only the table that is trying to reference it.
Is there an easy way to get the name of the parentTable?
I am using a number of tables on my application and two of which have a foreign key constraint I have set between them. When I change the account number on the main table via a combo box all of the relevant information for that table on the form is updated accordingly. However, the child table which has a foreign key reference to the Account Number of the main table is not updated when the acocunt number is changed. I have set the update to cascade in the references but still am having issues.
View 5 RepliesI would like to have a pop up messagebox that asks users for confirmation before deleting a record in datagridview and if the record is a foreign key to another table, another messagebox will appear and warns users saying" before you can delete this record, make sure you remove all the related records" I have tried but I don't know how to complete it.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.StaffTableAdapter.Fill(Me.StaffDBDataSet.Staff)
BindingNavigator1.DeleteItem = Nothing
End Sub
[code]....
How i replaced div tag from table format.
View 2 RepliesI want to replace the value of timeout in my table. The data type for my timeout column is time(7). I try the following code but I get error of "value of type of string cannot be converted to system.timespan
Dim datacontext As New DataClassesDataContext
Dim tout = (From p In datacontext.tblWorkTimes
Where p.Staff_Name.Equals(Session("staffname")) And p.Date.Date = DateTime.Now.ToString("dd/MM/yyyy")
Select p).Single
tout.TimeOut = DateTime.Now.ToString("HH:mm:ss")
datacontext.SubmitChanges()
I have a form with comboboxes, if the user doesnt select a value in the box I want a null to be sent to the database. The insert works fine, i look at the record in the db and see the null. The update doesnt work. gives me a n "Update statement conflicted with foreign key constaint....."
Public Sub Update()
TableAdapterCreate().Update(ID1, ID2, CType(cbox1.SelectedValue, Integer), CType(cbox2.SelectedValue, Integer), CType(cbox3.SelectedValue, Integer), CType(cbox4.SelectedValue, Integer),
[CODE]...
As I step through the selected value of the cbox 5 is shown as nothing (which it should be because the user didnt select a value for this combobox). I assume this needs to be a null instead of nothing to get written to the database. the combox boxes need to match a primary key in another table so sending a 0 would also result in the forieign key error since the related table does not have a 0 ID field.
I am selecting the max value of a column from a table. If the table does not have any rows i need the result as zero. how can i achieve this
View 6 Repliesi have a problem in locating bookmarks which are defined inside the table cell. Each table cell in my word document can contain multiple textboxes. I need to fill text in each of these textboxes using word automation. I tried placing bookmarks inside these textboxes for each cell and tried to replace using Word Automation. But unfortunately, i cant locate / replace the bookmark using the following lines:
cell.Range.Bookmarks.get_Item(ref oBookmark).Select(); //this is throwing exception as it couldnt find bookmark in cell.Range.Bookmarks list.cell.Application.Selection.InsertAfter("New Text");
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I want to use VB .Net to remove a table from an EXISTINGpowerpoint Slide Shape and replace it with a chart withoutdeleting the shape or adding a new shape. Presently using
Copy() and Paste() to place Chart in new Shape.
This is my first time working with VB, though I've been working with VBA for a couple years now to automate office routines at my work. At my last job, I saved about 3 hours a day with my automations, and at my current job, I'm shooting for about the same. The problem is, though I have a high affinity for computers and technology, I never studied to be a programmer, and so I really can only tweak code I find online, and then eventually build up enough of my own subroutines to accomplish the tasks at hand. This is why I'm posting here on this forum, I've reached my wits end for what I imagine is a relatively simple problem. This was initially written in VB 6, but I imported and converted it with Visual Studio 2008, and it runs fine. This demo code is set to populate a PDFwith some sample string text. What I want to do is to replace the string text with a reference to data in either an Access or SQL database - I prefer Access, but either will work. Here is a sample of the demo code I'm working with:
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On this last line, I want to replace the "1" sting text with a reference to a temporary 1-row table I'll be generating from an Access Query, with Field Names to match the Form Field names of the PDF, So I've setup an Access DB with the following configuration (in reference to the path, I'm using Vista x64):
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I have also imported this table as a dataset (my understanding is that the import into Visual Studio 2008 makes it a typed dataset?) so either referencing the access DB directly or the imported Dataset should work. I can also setup the Access DB as a SQL DB instead if it would make it easier. Now, if I was programming in VBA, I might do something like this:
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I have:
- Table1 with columns: PK_ID1, LOCATION, DIRECTOR, SELLER, SELLERID, WORKTIME (relationship), WORKCODE
- Table2 with columns: PK_ID2, WORKCODE (relationship) & WORK_DESCRIPTION
My DataGridView do a SELECT * FROM Table1;How can I replace WORKCODE with WORK_DESCRIPTION in DataGridView, please?
The file reads in parameters and two of the parameters used to be in Date Format YYYYMMDD but will now permanently be in format YYYY-MM-DD. This change, I believe, is stopping the import of the file from working. I would like to replace the new format YYYY-MM-DD back to YYYYMMDD in the code. If possible I'd also like to see some output so I know that the old format has been replaced with the new format. The code is below. I added the two rows with .replace code in green in expecting that to be enough but it is still not working.
Public
Sub Main()
Dim R1, O1, P1, C1, strDateFrom, strDateTo, strRunDate
As
String
[CODE]...
I'm working on a timekeeping application in Visual Basic 2008 and am having trouble formatting a timespan for display. Here's how I want to the information:If a positive number my Label will be: lblTimespan.txt will show as "12 Hours And 15 Minutes" This works fine.If its a negative number I want to display it as "(12 Hours And 15 Minutes)'[ in red. The problem is that I can't get rid of the minus sign. [code] Thr Replace doesn't seem to want to replace the "-", can anyone suggest what to do?
View 2 RepliesI have a bunch of object variables which are all initialised in their declarations such that:
Private _myObject As New ThisObject("SomeString")
where ThisObject is one of a number of object types, but all are initialised using a string.
I would like to use the Visual Studio Find/Replace dialog box to search for "As New" then replace everything from "As New" to the first set of speech marks with some text such that:
EDIT
My original example could be solved using other methods. This example is more representative of the actual problem:
Private _myObjectA As New ThisObjectA("SomeString")
Private _myObjectLongName As New ThisObjectLongName("SomeString")
[Code]....
I am trying to think of a regex replace to replace double quotes with nothing. Example:
hello("hi there") would become hello(hi there)
"hi" would become hi
"example "3" would become example "3
-edit Maybe an easier way to explain this is, replace all " that do not have a backslash before them.
I am trying to filter out all unwanted characters from a string. All I want in the string is letters A-Z, numbers 0-9 as well as comma (,) plus (+) and quotes (").I figured how to do the letters and numbers, but the 3 special characters are giving me a problem. I also tried with the Chr(34) equivelant for the " sign, but no luck, as and " or , messes up the way the code is read. Here�s what I have so far, but it only works for A-Z and 0-9:
STR = System.Text.RegularExpressions.Regex.Replace(STR, "[^A-Z, 0-9, Chr(43) ]", "")
How can I specify in my string that I want to replace occurrences of ALL characters and replace them with a specified character? Something like this:
'assuming currentWord is a string that contains any word
_myWord = CurrentWord.Replace("a-z,A-Z", "*")
I am using replace function to replace a character in the file
sw.WriteLine(Regex.Replace(strLine, "\", Chr(13)))
This code is working fine, but now I want to replace two times and I want to use the replace function twice. Something like this, but it is not working . Can anyone tell me how to use Replace function multiple times?
sw.WriteLine(Regex.Replace(strLine, "\", Chr(13)).Replace(strLine, Chr(13), ""))
Is it possible to have a Foreign Key as the Primary Key?
<Key()>
Public Property AssignmentID() As Integer
<ForeignKey("AssignmentID")>
Public Overridable Property Assignment As Assignment
Public Overridable Property User As User
For the code above I get an error:One or more validation errors were detected during model generation:System.Data.Edm.EdmAssociationEnd: : Multiplicity is not valid in Role 'AssignmentLocks_Assignment_Source' in relationship 'AssignmentLocks_Assignment'. Because the Dependent Role refers to the key properties, the upper bound of the multiplicity of the Dependent Role must be �1�.
I'm trying to create a table which has one (or none) record per assignment.
The general problem is that I can't get the foreign key in one of my child tables to populate the primary key from the parent table. I have a parent table named "ISSUES" and a child table named "ISSDESC". The primary key for ISSUES is ISS_ID which is an autonumber. The foreign key is ISS_ID in the ISSDESC table which is just a number. I'm using MS Access and an OLEDBConnection as the method. I've created the relationship in MS Access and also created the datarelation in the VB.NET code.
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I have a pretty standard MySQL-query in my winform application like this:SELECT * FROM tblTable WHERE tblTable.tableID = " & variable..One of the fields is a foreign key. And when I try to add a record to my datagridview I get the error:Cannot add or update a child row: a foreign key constraint fails..Can't MySQLCommandBuilder make INSERT-commands with tables containing foreign keys?
View 2 Replies