Update query error using csharp

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Database Design structure as follows;

Course Code text
Course Duration text
Hours text

Design as follows in run mode
Cmn_Minor_Code textbox1
Course_Duration textbox2
Allocated_Hours textbox3

i am inserting the above data in the database. it is working fine, no problem.

I am updating the course Duration and Allocated_Hours in the database using update query.

Update query as follows;

sql = "Update Tb_SCH_Faculty_Details set [Course_Duration,Allocated_Hours] = '" + textbox2.Text + "','" + textbox3 .Text + "' where Cmn_Minor_Code = '" + txt_coursecode.Text + "'";

when i run the above code shows error as follows

Syntax error in update statment.

what is the problem in my update query,
please help me.

Regards & Thanks,
Narasiman P

Posted 20-Feb-13 21:09pm

Member 8054539

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Surendra0x2 21-Feb-13 3:27am

sql = "Update Tb_SCH_Faculty_Details set [Course_Duration,Allocated_Hours] = '" + textbox2.Text + "','" + textbox3 .Text + "' where Cmn_Minor_Code = '" + txt_coursecode.Text + "'";

You Used Square Bracket here ?
why
if u want to update Multiple Columns then
simply

Update Tb_SCH_Faculty_Details set Course_Duration='" + textbox2.Text + "',Allocated_Hours='" + textbox3 .Text + "' where Cmn_Minor_Code = '" + txt_coursecode.Text + "'";

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OriginalGriff · Answer 1 · 2013-02-20T21:13:00

Solution 1

Change your query to:

C#

sql = "Update Tb_SCH_Faculty_Details set Course_Duration= '" + textbox2.Text + 
"',Allocated_Hours = '" + textbox3 .Text + "' where Cmn_Minor_Code = '" + txt_coursecode.Text + "'";

which will cure your immediate problem, but please, don't do it like that! Do not concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead.

Posted 20-Feb-13 21:13pm

OriginalGriff

Comments

[no name] 21-Feb-13 4:29am

i tried your query, when i update the course duration and allocated hourse and click the update button error shows as follows;

No value given for one or more required parametres.

OriginalGriff 21-Feb-13 4:33am

Did you convert it to a parametrised query?
Copy and paste your code!

[no name] 21-Feb-13 5:21am

try to use parameterise query to update the records.