mysql query with parametr in C#

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Hello

I want set parameter value in Select Mysql query in C#.
my query is:

C#

SELECT @param1:=id  FROM `X` WHERE nation_code='8989899';

this is trust query in sql section in PHPMyAdmin.
in C# ,I create command and add parameter to it

C#

command.Parameters.Add("@param1",MySql.Data.MySqlClient.MySqlDbType.String);

but when execute query recive syntax error near

C#

:=id  FROM

I changed := to = .query execute but @param1 will be NULL

thank's for your replay

Posted 18-Oct-13 12:53pm

ali majed

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Mehdi Gholam · Answer 1 · 2013-10-18T19:08:00

Solution 1

Read the following : http://stackoverflow.com/questions/652978/parameterized-query-for-mysql-with-c-sharp[^]

Posted 18-Oct-13 19:08pm

Mehdi Gholam

Comments

ali majed 19-Oct-13 3:00am

thank for reply but parameter is output not input .i want put id in @param1

Mehdi Gholam 19-Oct-13 5:15am

Try this : http://stackoverflow.com/questions/9195174/stored-procedures-with-mysql-connector-in-c-sharp

ali majed 20-Oct-13 7:29am

I know stored procedure but is there another way?
I test another way "SELECT id INTO @param1" but again run in PHPMyAdmin and get syntax error in C#

Mehdi Gholam 20-Oct-13 7:30am

Read the link and see how the output parameters are used.

ali majed 20-Oct-13 7:50am

it's OK but i don''t want use parameter in C# .I want use it in next query .in other word get id and use in next insert query and I want send all this in one command text. so it's not helpful get in C# value . I must access parameter in next query in next line

seyed mahmud shahrokni · Answer 2 · 2013-10-18T20:48:00

Solution 2

try this :

if you want to send a parameter to Sql u should change your query to

SQL

SELECT id=@parameter  FROM `X` WHERE nation_code='8989899';

also change your c# code to :

C#

string YourValue="Somthing";
command.Parameters.AddWithValue("@param1",YourValue);

Posted 18-Oct-13 20:48pm

seyed mahmud shahrokni

v2

Comments

ali majed 19-Oct-13 3:04am

thank for reply but parameter is output not input .i want put id in @param1