Array of SQLParameter

[kagitas via .NET 247]

(Type your message here)
Code taken from MSDN:

public void CreateMySqlCommand(SqlConnection myConnection,
string mySelectQuery, SqlParameter[] myParamArray) {
SqlCommand myCommand = new SqlCommand(mySelectQuery, myConnection);
myCommand.CommandText = "SELECT CustomerID, CompanyName FROM Customers WHERE Country = @Country AND City = @City";
myCommand.Parameters.Add(myParamArray);
for (int j=0; j<myParamArray.Length; j++)
{
myCommand.Parameters.Add(myParamArray[j]) ;
}
string myMessage = "";
for (int i = 0; i < myCommand.Parameters.Count; i++)
{
myMessage += myCommand.Parameters.ToString() + "\n";
}
MessageBox.Show(myMessage);
}

In this query "SELECT CustomerID, CompanyName FROM Customers WHERE Country = @Country AND City = @City";
how do we know which parameter of the parameter array is passed to the query.
For Eg: what would be the value of @Country as we are not using any indexer.

Thanks in adavnce,
Jaya.

 

[W.G. Ryan [eMVP]]

The first thing to do is look at the values in the params and see how they
are coming in. You are using named parameters so their position doesn't
matter as long as the spelling is correct. However this lacks some
elegance. I'd use a collection (or a hashtable) so i could load those
values as param names and then directly find their values.

HTH,

Bill

www.knowdotnet.com

(Type your message here)
Code taken from MSDN:

public void CreateMySqlCommand(SqlConnection myConnection,
string mySelectQuery, SqlParameter[] myParamArray) {
SqlCommand myCommand = new SqlCommand(mySelectQuery, myConnection);
myCommand.CommandText = "SELECT CustomerID, CompanyName FROM Customers

WHERE Country = @Country AND City = @City";

myCommand.Parameters.Add(myParamArray);
for (int j=0; j<myParamArray.Length; j++)
{
myCommand.Parameters.Add(myParamArray[j]) ;
}
string myMessage = "";
for (int i = 0; i < myCommand.Parameters.Count; i++)
{
myMessage += myCommand.Parameters.ToString() + "\n";
}
MessageBox.Show(myMessage);
}

In this query "SELECT CustomerID, CompanyName FROM Customers WHERE Country = @Country AND City = @City";
how do we know which parameter of the parameter array is passed to the query.
For Eg: what would be the value of @Country as we are not using any indexer.

Thanks in adavnce,
Jaya.