Hashtable object adding elements in an abnormal manner

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I am adding the following elements in a proper sequence at par with my table in database.

C#

objHT.Add("P_NAME", sName);
                objHT.Add("P_EMAIL", sEmail);
                objHT.Add("P_CONTACTNO", sContact);
                objHT.Add("P_COMPANY", sCompany);
                objHT.Add("P_ADDRESS", sAddress);
                objHT.Add("P_TIMELINE", sTimeline);
                objHT.Add("P_BUDGET", sBudget);
                objHT.Add("P_DETAILS", sPrjDtls);
                objHT.Add("FILEPATH", sFilePath);

but once the code is executed I find that they are added in the following order:

email, address, detail, name, contact, timeline, filelpath, budget, company

This is causing a problem as for fields there data type clash.

Please suggest me a solution or if 'am missing something.

Thanks

IB

Posted 30-Oct-13 21:51pm

Indrojeet_Bhattacharya

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Mehdi Gholam · Answer 1 · 2013-10-30T22:05:00

Solution 1

You are not guaranteed order when adding to a Hashtable.

Posted 30-Oct-13 22:05pm

Mehdi Gholam

Comments

CPallini 31-Oct-13 4:29am

5.

Mehdi Gholam 31-Oct-13 4:39am

Cheers!

CPallini · Answer 2 · 2013-10-30T22:29:00

Solution 2

That's how hastables work. I suppose you have to use a "OrderedDictionary Class"[^] instead.

Posted 30-Oct-13 22:29pm

CPallini

Comments

Mehdi Gholam 31-Oct-13 4:40am

5'ed, although in the case for the question a normal Dictionary might be better since it seems to keep the add order.

CPallini 31-Oct-13 4:56am

It is not guaranteed either: see
http://stackoverflow.com/questions/16694182/ordereddictionary-and-dictionary

By the way, thank you.

Indrojeet_Bhattacharya 31-Oct-13 5:11am

Can you suggest using any other data structure which can maintain the order.

CPallini 31-Oct-13 5:21am

I already did. Check out the documentation of OrderedDictionary class.

Indrojeet_Bhattacharya 31-Oct-13 5:21am

I saw your link and it says, when you are removing the elements then the order is not guaranteed. In my case I am NOT removing any element, I am simple using this Hashtable as:

if (con.State == ConnectionState.Closed)
{
con.Open();
}
sqlTran = con.BeginTransaction();
sqlCmd = new SqlCommand();
sqlCmd.Transaction = sqlTran;
sqlCmd.CommandType = CommandType.StoredProcedure;
sqlParam = sqlCmd.Parameters.Add("@return", System.Data.SqlDbType.VarChar);
sqlParam.Direction = ParameterDirection.ReturnValue;
sqlCmd.CommandText = sProcName;
sqlCmd.Connection = con;
IDictionaryEnumerator objEnum = objHT.GetEnumerator();
while (objEnum.MoveNext())
{
sqlCmd.Parameters.Add(new SqlParameter("@" + (objEnum.Key.ToString()), objEnum.Value));
}
sqlCmd.ExecuteNonQuery();

sqlTran.Commit();
sRetVal = sqlCmd.Parameters["@return"].Value.ToString();

whats your opinion ?

IB

CPallini 31-Oct-13 5:22am

As you probably saw in the comments, Dictionary contract does NOT guarantee the ordere is maintained. You may use it at your own risk :-)

Indrojeet_Bhattacharya · Answer 3 · 2013-10-31T01:25:00

Solution 3

Thanks for your efforts guys! but since i cannot use an unreliable data structure i fell back to procedure execution and solved it myself. Actually i was trying to create a generalized library method which could have eased the task for any insert operation. :)

Posted 31-Oct-13 1:25am

Indrojeet_Bhattacharya