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Posted by eggie5 on 06/04/07 00:45
I have some code (C#) that runs an SQL update query that sets the
value of a column to what the user passes. So, this causes an error
when anything the user passes in has a ' character in it. I'm sure
there's other characters that'll break it too. So, I was wondering,
how do I get around this? Is there some commonly accepted regex
pattern that will make the value safe to run in an SQL query? How can
I take care of any values that need to be escaped?
I'm not using any fancy ado.net objects:
string sql= [whatever the user passes in]
SqlConnection connection = new
SqlConnection(ConfigurationManager.ConnectionStrings[Utils.GetConnectionString].ToString());
connection.Open();
SqlCommand command = connection.CreateCommand();
command.CommandType = CommandType.Text;
command.CommandText = sql;
try
{
int result = command.ExecuteNonQuery();
if (result != 1)
{
Response.StatusCode = 500;
Response.Write("The file has been uploaded, but we
could not update the DB");
Response.End();
}
}
catch (InvalidOperationException)
{
Response.Clear();
Response.Write("error");
Response.StatusCode = 500;
Response.End();
}
connection.Close();
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