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Join Two Tables In Dataset And Show In Gridview Using Program 2008?


How to join two tables in dataset and show in gridview using vb.net 2008?


View 1 Replies (Posted: Jan 27th, 2010)

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Equivalent To JOIN Query With Dataset Multiple Tables?
How to Query multiple tables in a dataset to form single consolidated table without using any external database. I know this can be done using 'JOIN' in SQl.

Now my condition is I have multiple tables filled with data in a dataset and each table is interrelated with a common 'column'. For example ,

Table 1
ID
Name
1

[Code].....

Here I mentioned only two tables but in my case there are many tables. I need a generic answer for this dynamic query .

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[code]

select Employee.firstname+' '+Employee,secondname as Technician,Employee.firstname+' '+Employee.secondname as Dispatcher from Dispatch inner join Employee on Dispatch.TechnicianID=Employee.EmployeeID inner join Employee on

[CODE]...

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vb.net
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Here's an example of what I'd like to do:

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[code].....

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heres the sql statement I have so far:

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[code]....

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[code]....

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SELECT Table1.Field1, Table1.Field2, Table1.Field3, Table1.Field4, Table2. Field1, Table2.Field2 FROM Table1 INNER JOIN Table2 ON Table1.Field1 = Table2.Field1 AND Table1.Field2 = Table2.Field2 WHERE Table1.Field1=@Field1 AND Table1.Field2=@Field2;

[code].....

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I'm going to describe this as simple as possible, and it a typical setup for a database...

I have 1 DataSet, 2 DataGridViews (DGV), and 2 BindingSources (BS).
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Table 1 is a employee table
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FK is linked to EmployeeId of both tables.

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Well all that works great. But what if I need to programmatically select a row in Table 1 to cause Table 2 to update? I've tried everything I can think of, but Table 2 NEVER updates when I attempt to programmatically select a row or cell in Table 1.

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VS 2008 Multiple Tables In Single Dataset?
I am a new user. Apologies if I am posting this in wrong place and also if it is repeated one. I have few queries:

1.Is it possible to store multiple tables in a single DataSet?

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Posted: Apr 6th, 2012

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.net - Join 2 Tables With A New Compute Field?
here what i try to get:

Table A:
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[Code]....

In fact i want to list in grid the table A with a column which contains a checkbox and is checked if the item is include in table B (field TableA_Id_A).

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Let's say I have Plans and Documents
Dim myPlans = _context.Plans.Where(predicate1)
Dim myDocuments = _context.Documents.Where(predicate2)

I have structured the where clause for each using PredicateBuilder. So, myPlans and myDocuments have a correct SQL statement. What I'd like to do is join these two tables into one linq statement. The problem I'm having is that, by default the AND condition is joining the where clauses.

myPlans Where clause : (p.name like "%test%" AND p.name like "%bed%") OR (p.description like "%test%" AND p.description like "%bed%")
myDocuments Where clause : (d.name like "%test%" AND d.name like "%bed%") OR (d.description like "%test%" AND d.description like "%bed%")

When I combine the two the desired result Where clause is:
Where (d.ID = p.ID) AND
(myplans where clause above) OR (mydocument where clause above). Meaning, I'd like the two where clauses in each of the tables to be "or" instead of "And".

The current result where clause is:
Where (d.ID = p.ID) AND
(myplans where clause above) AND (mydocument where clause above). Meaning, I'd like the two where clauses in each of the tables to be "or" instead of "And".

I'm forming the statement like this:
Dim test = From d in myDocuments _
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Posted: Apr 23 09 at 22:11

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[Code]...

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Dim queryX = From m In db.Master
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In English, I want to join the master and detail tables, specifying conditions on each. But this causes the following compiler error:

"Name 'd' is either not declared or not in the current scope."

It works if I put this same condition in functional form:

Group Join d In db.Detail.Where(Function(x) x.Field = value)

but I think this is more typing, harder to understand, and introduces that irritating dummy variable. I really would prefer to use the query comprehension syntax. Is there a way to accomplish this?

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Please see my code
Dim adapter As SqlDataAdapter
Dim ds As New DataSet

[code].....

Posted: September 26, 2010

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provide a look at Table A left join B, C of the SQL statement

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[Code].....

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I believe this will be a much slower process than I would like. If I could load both queries into arrays or lists in VB and then compare them (therefore, not having to write 120,000 records to a DB file), it would be much faster.

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Dim filter = _
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[Code].....

If I use a normal JOIN then I get a list of friends for every separate product. I just want the two lists once.

The output lists with '-' need not be table cells, they can be <ul>s.

How can I achieve this? I would like to bind to ASP.net GridView. Should I try to do it all in one query, or use multiple queries and somehow add them both to the same Grid?

Each row actually forms part of a long report. Essentially each row of the report contains Customer ID, a bunch of other fields which match one-to-one with Customer ID, then the two lists for each Customer ID I described. Perhaps I can use a separate query for each list, then manually add each list to the grid on RowDataBound or similar?

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[Code]...

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Dim RIGHT_table As DataTable = ds1.Tables("t1")
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[code]...

Posted: 6/14/2012

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