Merge Two DataTables And Update An Acccess Database?
Jun 13, 2011
I have two DataTables that come from two tables in an Access 2007 database. The first is my table for car data and it has been populated with a process that reads text data. i can use this table and update the db and no problems. However the car data table also needs those cars even when no points where collected. So I have a control table that has a list of all cars. Now i have two tables and if I use the .Merge function I get a third table with both sets of data. But when i try to update the db with this third table I get an error "System.InvalidOperationException: Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information.
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Apr 12, 2010
I'm trying to create a program that will merge two data tables (one from a database on a network drive, the other is found in a database on the local machine). Each datatable is identical in structure, only (maybe) differs in content. The structure has a primary key, dateCreated, and dateLastEdited fields (plus other fields). I would like to merge down from the network to the local database. If the primary key does not exist on the local db but does on the network, copy from the network db to the local table. If it does exist, check the dateLastEdited column and copy the latest row to the local table.
How would i set up the code to do this? Any assistance would be great.
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May 20, 2012
I need to marge two datatables with condition. I have a datatable where the data comes from a local XML Database and another datatable where the data comes from a remote SQL Server. If any update made in the remote datatable I need to update/merge with the local datatable. Here is what I have so far:
Public Sub MargeTwoTable()
Dim SQL As String = ""
Dim RemoteTable As New DataTable
Dim LocalTable As DataTable
[code]....
In this code data comes from the remote database which updates a date getter then the local database . Both tables have "ID" as the primary key. The code is working well, but the problem is that when more than 1000 records are updated this function takes too long using loops.
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Jun 1, 2012
I'm having a hard time joining 2 datatables and have the joined datatable as result. First datatable (labels) holds data including a printerid. Second datatable (printers) holds printer references (id > unc). I would like to have as endresult (joined) a datatable with all data from the first datatable with the field (unc) of the second datatable. [Code]
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May 13, 2012
i create a Class to update data from remote sql server to local compact sql server data. I write two method one method check if any update date in remote server method like..[code]Last i Call SaveLocalDatabase method. But When i check table in my local compact sql server database there has no data update.is any think missing to write. i Think i found a problem. i use LocalTable.Merge(dTable, True). When Merge Call then rowstate remain unchange.
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Jan 12, 2009
My understanding of databases (access and sql) is fairly limited, though i have got a couple of programs under my belt using access databases, not yet used SQL. I could however, work around to figure out a way to do what i'm trying. What i don't understand is the need for all of the components, so all i'm after is somebody who can take the time to fully explain these further to me, or point me in the direction of somewhere i can gather a full understanding.
My questions are, for now;
1. Why do we need to take a copy of the database, rather than dealing exactly with the database itself?
2. What differences are there between datasets and datatables, what is better for what and why?
3. What is the purpose of the data adapter?
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Jul 12, 2011
have a datagridview containing 2 tables left joined, so that:table1 LEFT JOIN table 2 ON table1.id=table2.idI get an error whenever I try to edit my datagridview."invalidOperationException was unhandled by the user codeDynamic SQL generation is not supported against multiple base tables."The error points to this line:
da.FillSchema(dt, SchemaType.Mapped)
da.Update(dt) << This line
'da = dataadapter
[code].....
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Oct 2, 2010
I am using this editor for the users to enter their text in the database interface environment that will both load/save/show them what they are working on in the form and also mail-merge into a Word document waiting for the content. I can do the first step and it works well, but how do I get MS Word to recognize HTML as formatting instead of just merging in tags and text all as text?
The tool has two relevant properties: one to get just the text (no markup, i.e. no HTML) and one to get the full markup with HTML. Both of these are in text format (which I use for easy storage in the Database).
ideas/directions I can think of:
1) use the clipboard. I can copy/paste the content straight from the editor window to Word and it works great! But loading from a database is significantly different, even when using the clipboard programatically. (maybe I don't understand how to use the clipboard tools)
2) maybe there is a library or class/function in Word that can understand the HTML as "mergable" content?
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Apr 17, 2009
I have the same table in SQLServer and MSAccess database named "KHang" with fields : ID int identity(1,1) primary keys , MaKH char(4),TenKH varchar(50)
Here is my data :
MSAccess (" KHang" : Id-MaKH-TenKH)
1-KH01-tes
2-KH01-test
3-KH01-testing
SQLServer (" KHang" : Id-MaKH-TenKH)
1-KH02-testing1
2-KH02-testing2
I connect to MsAccess database using oledb in vb.net and fill data to DataSet1. So I want to update it to SQLServer database. I mean, the result will be like this:
SQLServer(table "KHang") :
(Id-MaKH-TenKH)
1-KH02-testing1
2-KH02-testing2
3 -KH01-tes
4 -KH01-test
5 -KH01-testing
How can I do it in vb.net?
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Jan 28, 2012
Suppose you have three file of a database with information for three years (imported information of one year to database and has saved as a new file). How we can merge this three file and create one database for all years with visual basic 2010?
Note:
1-Each database has three tables and there is relationship between them
2- The ID number in tables is Auto number
3- Fields in all tables for all files are completely the same
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Jun 24, 2010
I am trying to have letter templates (word documents) that are stored in sql server VarBinary(max) to be accessed via a web application where they will be edited and saved back to sql server by directors of our company. Then various managers will be able to select an existing template (word document), make any additions, and mail merge with a list of customers to print or save the letters.
I am looking to open up word within a web page much like you would an email in outlook, edit it with spell check and the like, and then save it back in sql server. I am able to get word to open from a file but it is outside of the web application in a separate word document. I am storing the word document in sql server but am unable to open it in word without having to save it to a disk (why should you have to go to a disk for viewing or editing?). I am able to programmatically mail merge but that is in a separate word application.
I am finding bits and pieces on the web but nothing that will pull things together such as embedding word but in a windows app not a web app. Mail merge from a file not from a database, converting a byte array to word in a directory but not on a web page.
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Nov 17, 2009
This is what I am trying to achieve.Lets say you got a database with say 4 colums.. eg.. Name , Acc Num , Amount , TotalThen I need to create a GIF of say 4 slides with the same background , BUT with the merged information as above from the database.
Application as follows :-
I wish to send out BULK MMS's with Client Statements.. Each one being personalised with the info as above. The MMS will contain the personalised GIF above.
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May 5, 2011
I am trying to essentially allow the user to merge data from a database onto a document and print it. I am new to working with the PrintDocument, but I believe this would be the way to accomplish this. I know how to print the text onto the PrintDocument at a certain position, but what I am trying to figure out is how to deal with the coordinates of the text I am drawing on the PrintDocument. Ideally, I would love to click on the PrintDocument in a PrintPreviewControl and capture the coordinates of the PrintDocument.
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Jun 3, 2012
I need to write a method in C# to save all rows in a given datatable back to the database, but I cannot depend on the rowstate of each row. I can't think of how best to do this without extensive looping through the database table data or constant database querying.
I want to essentially perform the following insert / update for each row in the datatable, but more efficiently:
[Code]...
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Jun 23, 2009
I am fresher in vb.net but I have experience in vb 6.0. But I want to connect database in sql server through sql connection. In that case how to create connection with window or sqlserver authintication mode and how to add or update new record in data base in batch transaction. Please help me with sample code.
So that I can understand eassily.
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Jul 6, 2009
Am I on the right path I programmatically create, fill, modify, essentially communicate with a set of Datatables, etc within my app while never having an actual database (i.e. Access.mdb file) all residing in memory but never really existing in an '.mdb' file, for example?
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Nov 15, 2011
update statement, i am trying to update a row within a access 2007 database here is my code.
[Code]...
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Apr 15, 2012
I am using vb.net with access database. I am using sql. How can i update database with the value 40'6"(Feet and inches values)
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Jun 26, 2009
What is wrong with this code. It does not update the access database and no error.
Dim conn As New OleDbConnection
Dim sqlQRY As String = "SELECT * FROM StdMaster WHERE StuNo = " & txtStudentNo.Text & " ORDER BY StuNo"
[CODE]...
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Feb 11, 2010
is there a way to update a database row with the update command by first defining all parameters and then all values just like you can in the insert command? "insert into table1 (parameter1,parameter2,....) values (value1, value2,....)"something like "set table1 (parameter1, parameter2) values (value1,value 2,...) where ...."?because I only know the syntax to define each parameters value "set table parameter1=value, parameter2=value2... where"
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Apr 20, 2010
This program is very difficult for me, but I must get threw it or I cannot finish... What I am doing is making a Database of foreign Languages with the spelling of the words and the pronounciation inside the database... The USER enters a paragraph of words into the translator textbox and pushed translate. The program has a DATABANK of words with the phonetic spellings and matches the word, then translates to phonetics. The problem is that new words keep appearing inside the language. So I incorporated a Database of 2 fields
[Code]...
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Jun 6, 2010
I created a dataset and i am using OleDbDataAdapter to insert new values to access database. But when i close the program and after open it, values are not in the database. How can i solve this problem? Also, i have another problem. When i write codes that
[Code]...
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Aug 11, 2009
i want to update my inventory table in database from another database name. Example: In VB, i had a form named Orderform. User need to select e product that they want and key in the quantity. all these information are able to store inside my database named ORDERTAB. but now the problem is i wanted to update another field in my database named INVENTORY by minus the quantity tat the user had key previously. i totally had no idea how it going to works.
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Sep 17, 2010
I got a system which i want to insert, delete, update the data into my database and the data from database will be display using datagrid. The below is the coding for one of my button, delete.
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Try
btnSearchEmpNo.Enabled = False[code].....
Now I wanna set when user click on this button to delete a employee (for example) then the datagrid that i have in my application will not show the data of the deleted employee but in the background, the employee haven't been deleted from database.The employee only will be deleted from database when the user click on SAVE button.I know this application have to use RowState but how?
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Nov 11, 2011
I'm trying to the contents of a datatable to a datatable thats allready in my form using the openfiledialog.[code]...
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Jan 23, 2012
How to intersect two dataTables in vb.net 2.0? I want to get common rows in two datatables and add it in third datatable.
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May 28, 2012
I have two datatables which I intends to bind them to Gridview. But I need bit of the first dt and bit from second dt.
Second table has only one row that represents to every row in the same column in first table.
There is no primary key or relationship between two tables though.
For example,
I tried datatable.merge though. Didn't produce the last table i want.
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Jun 7, 2012
I have a Main Table that contains all the distinct values in a DataTable.DataColumn. also have a Child Table that contains distinct values created by the user.I want to merge the Child Table DataRows that match on the Value column with theMain Table DataRows to create the New Table (shown below).I want to preserve the values in the Selected column of the Child Table.Here is my problem, if I use the DataTable.Merge method the DataRow that contains "888" in the Child Table is added to the New Table, but it doesn't contain a RowState = Added, thus I can't filter for added rows to remove them.
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Jun 10, 2010
I am using VB Express 2008 and SQL Server Express 2008.I have one DataGridView on a Windows Form, which I am attempting to populate from two datatables. Both tables are identical in structure, but with data from two different dates. The respective SELECT statements are identical, except for the date; one calls for yesterday, one for today. I need a seperate Sum column from each table.I've tried to JOIN, UNION, and MERGE the tables, but that gives me all the data consecutively and I saw no way to seperate the days. I'm able to add DataColumns, and sum the fields with an expression, but is it possible to create DGV columns and bind them to the seperate DataTable columns? [code]
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Mar 19, 2012
I am stuck with an issue.I have two datatables, with the same table structure, i need to select data from table1 such that the records arent existing in table2is it possible to do this in vb.net? if yes then how?
Table1(AAno,Agencyname,location)
Table2(AAno,Agencyname,location)
Criteria:Select AAno,Agencyname,location from table1,table2 where table1.AAno<>table2.AAno
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