Mysql gives error in between statement when query firing in program.

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I recently got very different error. that I wrote a query which when execute from mysql workbench it executes successfully and showing result as required but when same query executing from c# code it is giving error?
whats wrong with my query please tell me where is the problem ?

here is my code and query statement,

C#

string query = "SELECT DISTINCT indent_no as 'Indent No'," +
                " approved_date as 'Approved Date'," +
                " from_store_name as 'From Store'," +
                " to_store_name as 'To Store'," +
                " indent_status as 'Indent Status'," +
                " processing_status as 'Processing Status'" +
                " FROM vw_DSInfo_indent_details" +
                " WHERE indent_status like 'Approved'" +
                " AND processing_status Not like 'Fully Processed'" +
                " AND from_store_name = @fmstore" +
                " AND to_store_name = @tostore" +
                " AND approved_date between @from and @to;"; 
                         
cmd = new MySqlCommand();
cmd.CommandText = query;
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
cmd.Parameters.Add(new MySqlParameter("from", datetimefrm));
cmd.Parameters.Add(new MySqlParameter("to", datetimeto));
cmd.Parameters.Add(new MySqlParameter("fmstore", txtfromstore.SelectedItem));
cmd.Parameters.Add(new MySqlParameter("tostore", txttostore.SelectedItem));
table = new DataTable();
adapter = new MySqlDataAdapter(cmd);
adapter.Fill(table);
int c = table.Rows.Count;
}

edited::
error at bold line if i execute without this line then shows result but with this line not gives any result.

Posted 22-Jan-16 18:25pm

Member 11543226

Updated 22-Jan-16 20:33pm

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Comments

Sarath kumar.N 23-Jan-16 0:52am

You got very different error! What is the error message?

Member 11543226 23-Jan-16 2:10am

it not gives any error now but not showing result

PIEBALDconsult 23-Jan-16 1:25am

I may just be tired, but doesn't the MySQL provider use backticks (`) rather than apostrophes?

I also recommend using a verbatim string when writing long SQL statements, to ensure that nothing breaks when copying to/from some other tool.
For example:

string query = @"
SELECT DISTINCT indent_no as `Indent No`
, approved_date as `Approved Date`
, from_store_name as `From Store`
, to_store_name as `To Store`
, indent_status as `Indent Status`
, processing_status as `Processing Status`
FROM vw_DSInfo_indent_details
WHERE indent_status like `Approved`
AND processing_status Not like `Fully Processed`
AND from_store_name = @fmstore
AND to_store_name = @tostore
AND approved_date between @from and @to;
" ;
(Putting the commas at the beginnings of lines makes it easier for me to see them.)

Garth J Lancaster 25-Jan-16 0:43am

(I've only ever used single quotes with MySQL on Windows) but I do like your example, ie Verbatim string, SQL keywords in CAPS, putting the commas at the front of the lines - this last one narks my 'internal style guide', but makes sense :-)

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Garth J Lancaster · Answer 1 · 2016-01-22T19:01:00

Solution 1

try it this way (note my mods to your cmd.Parameters.Add(...) lines)

C#

cmd.Parameters.Add(new MySqlParameter("@from", datetimefrm));
cmd.Parameters.Add(new MySqlParameter("@to", datetimeto));
cmd.Parameters.Add(new MySqlParameter("@fmstore", txtfromstore.SelectedItem));
cmd.Parameters.Add(new MySqlParameter("@tostore", txttostore.SelectedItem));

Posted 22-Jan-16 19:01pm

Garth J Lancaster

Comments

Member 11543226 23-Jan-16 2:10am

i did this before but not getting result. error is at between clause, if i removed between clause it shows result but with this condition it doesn't shows result.

PIEBALDconsult 23-Jan-16 10:38am

Then lok at the values of @from and @to to ensure that they are what you expect.