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Hallo,
I just posted this message in C#-section, but I saw the ADO.NET section and I think its better to post it here... sorry for doubleposting...
I'm a real beginner with C# and I have a silly problem with one DataTable combined with a DataGrid.
Short describing of surround:
I have one DataSet with three DataTables, each shown in DataGrids.
The DataSet is persistent (typed DataSet) as .xsd-file.
DataBase ist MSDE. All three DataTables are filled with the
DataAdapter.(DataSet, DataTable).Fill-Method.
If I execute the fill-Methode for one table twice or more, in my datagrid the records are added. To avoid this behaviour, I want to use the
DataSet.Tables["table"].Clear()-Method
before executing the Fill-Method. With two DataTables it works, but with the third, the DataGrid stays empty after the Fill-Method.
- in the debugger I can see that there are records in the DataTable
- when I click into the DataGrid, an error occurs that I try to translate (German version):
"DataBinding could not find line in list that can be used vor all bindings."
Help would be very appreciated.
Thanks
Vexta
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If i have 2 table, table1 and table2, and joining them in a view, should I first select all fields from table1 and then fields from table2, or I can select in random order from both tables? Is there any performance issue, if selecting in random order? Thanks.
<italic>Work hard, Work effectively and a bit of luck is the key to success.
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Hi, I have exported as a script my db from one server and i want to run the script in the other server in order to create the db that i had in my first server Can somebody tell me how to do that?
La Light
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Inside SQL Enterprise select the database.
/All Tasks/Generate SQL Script
Press Show All and you in businees.
Hope this helps
Al
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Hi All,
I need to assign ranks to the people according to their scores (within each exam).
Id ExamCode Total
1 C1 100
1 C2 98
2 C1 100
2 C2 97
3 C1 89
3 C2 99
how can i accomplish this..
Can anyone help me
Thanks in advance,
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Here's a code from MSDN, might help you. Case[^]
USE pubs<br />
GO<br />
SELECT 'Price Category' = <br />
CASE <br />
WHEN price IS NULL THEN 'Not yet priced'<br />
WHEN price < 10 THEN 'Very Reasonable Title'<br />
WHEN price >= 10 and price < 20 THEN 'Coffee Table Title'<br />
ELSE 'Expensive book!'<br />
END,<br />
CAST(title AS varchar(20)) AS 'Shortened Title'<br />
FROM titles<br />
ORDER BY price<br />
GO
<italic>Work hard, Work effectively and a bit of luck is the key to success.
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strsql = " select * from dic where english='" & SearchBox.Text Or TextBox4.Text & "'"
The machine said Input string was not in a correct format.
How can i select database with or operator in asp.net .
Is it possible to select database in sql from more textbox ?
ere ewrewrwe werewrewr
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bibipopopopo wrote:
strsql = " select * from dic where english='" & SearchBox.Text Or TextBox4.Text & "'"
It is certainly possible to build a dynamic SQL query like the one you are referring, but I think you have just got your string formation messed up.
Assuming that SearchBox and TextBox4 are VB textboxes containing some textual criteria, then try:
<br />
strsql = "SELECT * FROM dic WHERE english='" & SearchBox.Text & "' OR '" & TextBox4.Text & "'"<br />
Notice the ' in the string separators.
This would form a valid statement e.g.
SELECT * FROM dic WHERE english='AMERICAN' OR 'CANADIAN'
I Dream of Absolute Zero
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Hi All,
I need to assign ranks to the people according to their scores (within each exam).
Can Anyone help me...
Thanks in advance,
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I want to pull data from a table using a regular SQL statement for my adapter (using WHERE and ORDER BY - this I can do fine) but I want to use values from another table as criteria for my WHERE statements... how do I do this?
Basic Sample would be nice.
Thanks
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There are many ways. Can you give an example of what you are trying to do? Do you just want to use the value from one row in the other table as the criteria? (Simply extracting the data into variables then using in a where might be sufficient in this case) Do you want to use data from many rows as the criteria? (In which case some sort of table join would be best)
My: Blog | Photos | Next SQL Presentation
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and More
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Lets say Table1 has:
ID, Num1, Num2, Num3, FullName, ItemName, ItemColor, ItemValue, ItemWeight
Table2 has:
ID, Ber1, Ber2, Ber3
To sort Table1 generically I would use:
SELECT ID, Num1, Num2, Num3, FullName, ItemName, ItemColor, ItemValue, ItemWeight FROM Table1 WHERE ItemValue>100 ORDER BY Num1, Num2, Num3, ItemWeight
I would like to use Table2’s values from columns Ber1, Ber2, and Ber3 as criteria to sort by for Table1’s Num1, Num2, and Num3’s values.
Just the values from a single row for now would be helpful (Columns Ber1, Ber2, and Ber3).
This is used for configuring the Adapter for the connection.
By the way, the two tables aren't related.
The columns (Num1, Num2, Num3 and Ber1, Ber2, Ber3) do have the same Look-Up Tables. I just have Table2 as a criteria to sort Table1 by.
Looking into JOINS.
Thanks
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Thanks Colin,
I ended up using an INNER JOIN similar to what follows:
SELECT * FROM Table1 INNER JOIN Table2 ON Table1.Num1 = Table2.Ber1 AND Table1.Num2 = Table2.Ber2 AND Table1.Num3 = Table2.Ber3 WHERE ItemValue > 100 ORDER BY ItemWeight, AndAnythingElse
This was the easiest, just didn't know what was best.
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Anybody know if the COALESCE(NULLIF ...)...) can raise error itself, and if
it safely to use this combination of checking error status
Every time after i calling to some store procedure i use this:
------------------------------------------
DECLARE @intError int
EXEC @intError = myProcedure @param1, @param2 .....
SELECT @intError = COALESCE(NULLIF(@intError, 0), @@ERROR)
IF(@intError =0 )
......
......
--------------------------------------------
my question is, can the @@ERROR variable have an error that COALESCE or
NULLIF function were raise?
Thanks.
P.S. if it's not good idea to use it after calling to stored procedures so
what can u advice me
------------------------------------
To study, study and only to study
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1)How to make (.mdf) file in Sql Server (use to deploy database on other computer)
Actually i want to deploy my SQL database along with its data to other computer
EsHbAn BaHaDuR
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si_69 wrote:
Would be best to attach and detach
May I ask why?
The article you link to does at least tell the user how to get round the main problem of detaching and reattaching (loss of users - which is because the logins are stored in the Master database and referenced in the individual databases and the uids may be different across servers). However, I've never had that problem with restoring a backup.
My: Blog | Photos | Next SQL Presentation
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and More
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Colin Angus Mackay wrote:
May I ask why?
minimal downtime and no data loss,it is best to move it by detaching and then reattaching the database on the new server. The database will be offline during the move but it is better to have it offline than to miss transactions when backing up and then restoring the database on the new server.
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Hi To ALL!
can any body tell me the difference between batches and stored procedure?
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