Calling objects in c#

Question

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Hello

I have created objects for connction and command in one cs file.
Now i want them in another cs file.
How to do it.

Example

C#

private SqlConnection _database;
private SqlCommand cmd;

Now my code on another page for add button is

SQL

cmd.Parameters.Add("@Name", SqlDbType.VarChar).Value = txtName.Text.Trim();
cmd.Parameters.Add("@Description", SqlDbType.VarChar).Value = txtDesc.Text.Trim();
cmd.Parameters.Add("@Image", SqlDbType.VarChar).Value = txtImage.Text.Trim();
cmd.Parameters.Add("@Active", SqlDbType.VarChar).Value = txtActive.Text.Trim();
cmd.Parameters.Add("@CreatedBy", SqlDbType.VarChar).Value = txtCreatedBy.Text.Trim();
cmd.Parameters.Add("@CreatedDate", SqlDbType.DateTime).Value = txtCreDate.Text.Trim();

cmd.Connection = con;
cmd.CommandText = "sp_SqlImage";

Now i want to do the same logic but withour creating cmd object.
Plz help.

Posted 17-Jun-12 22:34pm

Nikil0012

Updated 18-Jun-12 0:01am

Rahul Rajat Singh

v2

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Sandeep Mewara · Answer 1 · 2012-06-17T23:11:00

Solution 1

Now i want to do the same logic but withour creating cmd object.
Well, you can try SqlDataAdapters. You don't need to define a command object explicitly for it. It takes care by itself internally.

Refer:
MSDN: DataAdapter Parameters (ADO.NET)[^]
MSDN: Populating a DataSet from a DataAdapter (ADO.NET)[^]

Posted 17-Jun-12 23:11pm

Sandeep Mewara

Comments

Manas Bhardwaj 18-Jun-12 5:42am

Correct +5!

Sandeep Mewara 18-Jun-12 11:26am

Thanks.

Rakesh Meel · Answer 2 · 2012-06-17T23:19:00

C#

public static SqlDataAdapter CreateSqlDataAdapter(SqlConnection connection)
{
    SqlDataAdapter adapter = new SqlDataAdapter();
    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;

    // Create the commands.
    adapter.SelectCommand = new SqlCommand(
        "SELECT CustomerID, CompanyName FROM CUSTOMERS", connection);
    adapter.InsertCommand = new SqlCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (@CustomerID, @CompanyName)", connection);
    adapter.UpdateCommand = new SqlCommand(
        "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " +
        "WHERE CustomerID = @oldCustomerID", connection);
    adapter.DeleteCommand = new SqlCommand(
        "DELETE FROM Customers WHERE CustomerID = @CustomerID", connection);

    // Create the parameters.
    adapter.InsertCommand.Parameters.Add("@CustomerID",
        SqlDbType.Char, 5, "CustomerID");
    adapter.InsertCommand.Parameters.Add("@CompanyName",
        SqlDbType.VarChar, 40, "CompanyName");

    adapter.UpdateCommand.Parameters.Add("@CustomerID",
        SqlDbType.Char, 5, "CustomerID");
    adapter.UpdateCommand.Parameters.Add("@CompanyName",
        SqlDbType.VarChar, 40, "CompanyName");
    adapter.UpdateCommand.Parameters.Add("@oldCustomerID",
        SqlDbType.Char, 5, "CustomerID").SourceVersion =
        DataRowVersion.Original;

    adapter.DeleteCommand.Parameters.Add("@CustomerID",
        SqlDbType.Char, 5, "CustomerID").SourceVersion =
        DataRowVersion.Original;

    return adapter;
}
string selectSQL =
  "SELECT CustomerID, CompanyName FROM Customers " +
  "WHERE CountryRegion = ? AND City = ?";
string insertSQL =
  "INSERT INTO Customers (CustomerID, CompanyName) " +
  "VALUES (?, ?)";
string updateSQL =
  "UPDATE Customers SET CustomerID = ?, CompanyName = ? " +
  "WHERE CustomerID = ? ";
string deleteSQL = "DELETE FROM Customers WHERE CustomerID = ?";

public static SqlDataAdapter CreateSqlDataAdapter(SqlConnection connection)
{
    SqlDataAdapter adapter = new SqlDataAdapter();
    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;

    // Create the commands.
    adapter.SelectCommand = new SqlCommand(
        "SELECT CustomerID, CompanyName FROM CUSTOMERS", connection);
    adapter.InsertCommand = new SqlCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (@CustomerID, @CompanyName)", connection);
    adapter.UpdateCommand = new SqlCommand(
        "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " +
        "WHERE CustomerID = @oldCustomerID", connection);
    adapter.DeleteCommand = new SqlCommand(
        "DELETE FROM Customers WHERE CustomerID = @CustomerID", connection);

    // Create the parameters.
    adapter.InsertCommand.Parameters.Add("@CustomerID",
        SqlDbType.Char, 5, "CustomerID");
    adapter.InsertCommand.Parameters.Add("@CompanyName",
        SqlDbType.VarChar, 40, "CompanyName");

    adapter.UpdateCommand.Parameters.Add("@CustomerID",
        SqlDbType.Char, 5, "CustomerID");
    adapter.UpdateCommand.Parameters.Add("@CompanyName",
        SqlDbType.VarChar, 40, "CompanyName");
    adapter.UpdateCommand.Parameters.Add("@oldCustomerID",
        SqlDbType.Char, 5, "CustomerID").SourceVersion =
        DataRowVersion.Original;

    adapter.DeleteCommand.Parameters.Add("@CustomerID",
        SqlDbType.Char, 5, "CustomerID").SourceVersion =
        DataRowVersion.Original;

    return adapter;
}

OdbcDataAdapter adapter = new OdbcDataAdapter();

OdbcCommand selectCMD = new OdbcCommand(selectSQL, connection);
adapter.SelectCommand = selectCMD;

//Add Parameters and set values.
selectCMD.Parameters.Add("@CountryRegion", OdbcType.VarChar, 15).Value = "UK";
selectCMD.Parameters.Add("@City", OdbcType.VarChar, 15).Value = "London";

DataSet customers = new DataSet();
adapter.Fill(customers, "Customers");