Automatically check label value against datagridview

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I am trying to make the system check that the number in the label, correlates with one in the database ( similar concept to a login page) However the user shouldnt need to enter any information but I keep on getting errors...

OleDbDataAdapter da = new OleDbDataAdapter("Select * from [Customer Orders] WHERE [Order ID] = @[Order ID]", MAcon);
da.SelectCommand.Parameters.AddWithValue("@[Order ID]", PrdtID.Text);
DataTable dtbl = new DataTable();
da.Fill(dtbl);

What I have tried:

OleDbDataAdapter da = new OleDbDataAdapter("Select * from [Customer Orders] WHERE [Order ID] = @[Order ID]", MAcon);
da.SelectCommand.Parameters.AddWithValue("@[Order ID]", PrdtID.Text);
DataTable dtbl = new DataTable();
da.Fill(dtbl);

Posted 11-Apr-18 12:53pm

Member 13512434

Updated 11-Apr-18 17:54pm

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[no name] 11-Apr-18 19:44pm

And what is your question?

Wendelius 11-Apr-18 23:32pm

What is the error you get?

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an0ther1 · Answer 1 · 2018-04-11T17:55:00

Use your debugger - check the statement, does it make sense, can you execute it via another query tool against the DB?
Likely issues are;
First issue - why are you naming your parameter "@[Order ID]"?
Parameter names should not contain spaces, nor should they use [] brackets. the [] brackets are used when querying columns that contain spaces or reserved words.
Change your parameter name to; @OrderId
Secondly, you may find that AddWithValue is interpreting your value as an incorrect data type, hence your statement ends up as;

SQL

SELECT * FROM [Customer Orders] WHERE [Order ID] = '2'

when you actually want

SQL

SELECT * FROM [Customer Orders] WHERE [Order ID] = 2

Depending on the database engine you are using this may or may not be automatically converted - MS SQL will normally return correctly but MS Access does not.
Either convert the string value to the correct data type - most likely an integer, or use;

C#

da.SelectCommand.Add("@OrderId", OleDbType.Integer).Value = 2

This will ensure your statement gets correctly created.

Kind Regards