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i have multiple sqlquery in use sqlcommand object to fire if i use cmd multiple times then it gives error that cmd already exist so i used cmd1,cmd2,cmd3 etc but it is not good way of coding so how can initialise sqlcommand object publically in top of page????
plz help me...
my code is below:-

string mail = "select CONTACT_EMAIL from QAFranchise.HDR_CONTACT_LIST where CONTACT_EMAIL='"+Class1.MailID+"'";
        SqlCommand cmd5 = new SqlCommand(mail, cn);
        string mailid = Convert.ToString(cmd5.ExecuteScalar());

        string contactID = "select CONTACT_LIST_ID,CONTACT_EMAIL from QAFranchise.HDR_CONTACT_LIST where CONTACT_EMAIL='"+mailid+"' ";
        SqlCommand cmd6 = new SqlCommand(contactID, cn);
        Class1.ContactlistID = Convert.ToInt32(cmd6.ExecuteScalar());

thanks in advance.

[edit]code block added[/edit]
Posted 17-Nov-12 1:43am
Updated 17-Nov-12 2:30am
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Solution 2

It is better and easy to use a separate class for the database operations. For Example.

protected void Page_Load(object sender, EventArgs e)
        dbConnection connection = new dbConnection();
        private void FetchContactMail()
           string contactEmail = string.Empty;
           object myData = connection.FetchMyData("select CONTACT_EMAIL from QAFranchise.HDR_CONTACT_LIST where CONTACT_EMAIL = 'yourmail'");
           if (myData != null)
               contactEmail = myData.ToString();
        private void FetchContactID()
            int contactID = -1;
            object myData = connection.FetchMyData("select CONTACT_LIST_ID from QAFranchise.HDR_CONTACT_LIST where CONTACT_EMAIL = 'yourmail'");
            if (myData != null)
                contactID = Convert.ToInt32(myData);

And a new class for database operations.

class dbConnection
    private string _connectionString = "your connection string";
    public object FetchMyData(string query)
        object objVal;
        using (SqlConnection con = new SqlConnection(_connectionString))

            using(SqlCommand cmd = new SqlCommand(query,con))
                objVal = cmd.ExecuteScalar();
        return objVal;



Then it will be easier for you to manage.
Dominic Abraham 18-Nov-12 1:30am
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Solution 1

Code like this

SqlCommand cmd=new SqlCommand();


If you have parameters that clear them.


Ask me if you have any questions?

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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