Sql参数集合

Question

I have 5 parameters and I want to send them to the method:

public static SqlCommand getCommand(string procedure, SqlParameter[] parameter)
{
   Sqlcommand cmd;
   return cmd
}

Can I send these paramters at one time like this?

SqlParameterCollection prm;
prm.Add(p1);
prm.Add(p2);
prm.Add(p3);
prm.Add(p4);
prm.Add(p5);
sqlcommand cmd = getCommand(prm);

Answer 1

Or create an array of parameters by hand:

SqlParameter[] parameter = {
new SqlParameter(...), 
new SqlParameter(...), 
new SqlParameter(...)
};

But I don't see what should be wrong with your approach. It simple, readable and understendable.

Answer 2

I don't see what's wrong with that? You do know that, if this is .NET, you need to attach the parameters to the SqlCommand object?

So:

SqlCommand query = new SqlCommand(sqlString, Connection);
query.Parameters.AddWithValue(parameter,valueToPass);

etc?

Sorry if that's not related, not completely sure on your question? Your method doesn't really do anything, I take you left out the code and just put in a dummy for the purposes of asking the question? You can pass an array as an arguement so you just need to spilt it up?

Answer 3

Using this as inspiration, this code worked for me:

List<SqlCeParameter> parameters = new List<SqlCeParameter>();

parameters.Add(new SqlCeParameter("@Username", NewUsername));
parameters.Add(new SqlCeParameter("@Password", Password));

cmd.Parameters.AddRange(parameters.ToArray());

Answer 4

好吧，这不会编译，因为在对getCommand的调用中，您没有在过程中传递字符串，但是就数组而言，这应该没问题。

Answer 5

Here is my code.You can use all parameter properties like name,value,type etc.

int SelectedListID = 6;
string selectedPrefix = "IP";
string sqlQuery = "select * from callHistory where ImportID=@IMPORTID and Prefix=@PREFIX"

SqlParameter[] sParams = new SqlParameter[2]; // Parameter count

sParams[0] = new SqlParameter();
sParams[0].SqlDbType = SqlDbType.Int;
sParams[0].ParameterName = "@IMPORTID";
sParams[0].Value = SelectedListID;

sParams[1] = new SqlParameter();
sParams[1].SqlDbType = SqlDbType.VarChar;
sParams[1].ParameterName = "@PREFIX";
sParams[1].Value = selectedPrefix;


SqlCommand cmd = new SqlCommand(sqlQuery, sConnection);

if (sParams != null)
{
    foreach (SqlParameter sParam in sParams)
    {
        cmd.Parameters.Add(sParam);
        Application.DoEvents();
    }
}

Answer 6

Form1.cs

    static private void FunctionCall()
    {

        string connectionString = "DATA Source=nwind;server=GRAPHICS\SQLEXPRESS;Persist Security Info=False;Integrated Security=SSPI;Connect Timeout=30";
        string sSqlQuery;

        DataSet ds;
        DataTable dt;

        // Prepare SQL Query
        sSqlQuery = @"
        select content " +
        "from " +
        "[TBL] where id = '000-000'";

        SqlParameter[] sqlParams = {
                new SqlParameter("",SqlDbType.Int), 
                new SqlParameter("",SqlDbType.VarChar), 
                new SqlParameter("",SqlDbType.VarChar)
        };

        // Read from database
        ds = SqlHelper.ExecuteNonQuery(connectionString, sSqlQuery, CommandType.Text, sqlParams);
        dt = ds.Tables[0];
     }

SqlHelper.cs

// Executes a non query

public static int ExecuteNonQuery (string connectionString, string cmdText, CommandType type, SqlParameter[] prms)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(cmdText, conn))
                {
                    cmd.CommandType = type;

                if (prms != null)
                {
                    foreach (SqlParameter p in prms)
                    {
                        cmd.Parameters.Add(p);
                    }
                }
                conn.Open();
                return cmd.ExecuteNonQuery();
            }
        }
    }

Answer 7

1.

public IEnumerable<SqlParameter> GetAndSetParameters(List<Tuple<string, string>> parameters){
            List<SqlParameter> paramlist = new List<SqlParameter>();

            foreach (var item in parameters)
        {
            paramlist.Add(new SqlParameter(item.Item1, item.Item2));
        }
        return paramlist;
    }

2. pass parameters

 public List<Tuple<string, string>> GetUserParameter(){
        List<Tuple<string, string>> list = new List<Tuple<string, string>>();
                list.Add(new Tuple<string, string>("@User",user.UserID));
                   return list;
        }

3. finally use it:

 SqlCommand oCmd = new SqlCommand(oString, myConnection);
                oCmd.Parameters.AddRange(GetAndSetParameters(GetUserParameter()).ToArray());