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Introduction
This program will help you write the necessary code for doing base operations of your application's Data Layer (both Web and Windows applications). The function of this program is making a DAL class for easily selecting, manipulating and deleting records of the Database. The result is a simple class for each table in your database. The structure is described below in a schematic view.Background
Using the Code
Class Structure
- Property
InsertmethodUpdatemethodDeletemethodSelectmethod
Description
- These generated properties indicate each field of a table. You may use them to
getorsetvalues in your application:Hide Copy Codeprivate string ConnectionString;
public City(string ConnStr)
{
ConnectionString = ConnStr;
}
private string m_Code;
public string Code
{
get { return m_Code; }
set { m_Code = value; }
}
private string m_Title;
public string Title
{
get { return m_Title; }
set { m_Title = value; }
}
private string m_Province_Code;
public string Province_Code
{
get { return m_Province_Code; }
set { m_Province_Code = value; }
} - This method uses generated stored procedures to
Insertrecords into the database. It passes given values of each field to that stored procedure:Hide Copy Codepublic void Insert(string Code , string Title , string Province_Code)
You can also use the second overload of the
{
SqlConnection conn = new SqlConnection(ConnectionString);
SqlCommand cmd = new SqlCommand("Insert_City", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue(@Code ,Code );
cmd.Parameters.AddWithValue(@Title ,Title );
cmd.Parameters.AddWithValue(@Province_Code ,Province_Code );
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch
{}
finally
{
if (conn.State==ConnectionState.Open)
{
conn.Close();
}
conn.Dispose();
cmd.Dispose();
}
}Insertmethod to insert a record using currently specified properties. - The
Updatemethod manipulates a record in database using the generated stored procedures. Such as above, this method calls the proper stored procedure with the given values:Hide Copy Codepublic void Update(string Code , string Title , string Province_Code)
{
SqlConnection conn = new SqlConnection(ConnectionString);
SqlCommand cmd = new SqlCommand("Update_City", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue(@Code ,Code );
cmd.Parameters.AddWithValue(@Title ,Title );
cmd.Parameters.AddWithValue(@Province_Code ,Province_Code );
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch
{}
finally
{
if (conn.State==ConnectionState.Open)
{
conn.Close();
}
conn.Dispose();
cmd.Dispose();
}
} - This method uses generated stored procedures to delete a record from the database. It takes the value of the key field and calls the stored procedure using that value:Hide Copy Code
public void Delete(string ID)
{
SqlConnection conn = new SqlConnection(ConnectionString);
SqlCommand cmd = new SqlCommand("Delete_City", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue(@ID,ID);
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch
{}
finally
{
if (conn.State==ConnectionState.Open)
{
conn.Close();
}
conn.Dispose();
cmd.Dispose();
}
} - Use this method to select a record set from a table to use later in your application. This method returns a
datasetobject using the generated stored procedure:Hide Copy Codeprivate DataSet Select()
{
SqlConnection conn = new SqlConnection(ConnectionString);
SqlDataAdapter cmd = new SqlDataAdapter("Select_City", conn);
DataSet dts = new DataSet();
try
{
conn.Open();
cmd.Fill(dts);
return dts;
}
catch
{
return null;
}
finally
{
if (conn.State==ConnectionState.Open)
{
conn.Close();
}
conn.Dispose();
cmd.Dispose();
}
}
SQL Transact
This program can generate transact-SQL to reach the nice methodology of "Fat Server and Thin Client". Below is the generated code we talk about:- InsertHide Copy Code
CREATE PROCEDURE [insert_City]
(
@Code [int],
@Title [nvarchar](50),
@Province_Code [int]
)
AS INSERT INTO City
(
Code,
Title,
Province_Code
)
VALUES
(
@Code,
@Title,
@Province_Code
) - UpdateHide Copy Code
CREATE PROCEDURE [update_City]
(
@Code [int],
@Title [nvarchar](50),
@Province_Code [int]
)
AS UPDATE City
SET
Code = @Code,
Title = @Title,
Province_Code = @Province_Code
WHERE
(
ID=@ID
) - DeleteHide Copy Code
CREATE PROCEDURE [delete_City]
(@ID [int])
AS
DELETE [City]
WHERE
([ID] = @ID) - SelectHide Copy Code
CREATE PROCEDURE [Select_City]
AS
SELECT [ID],
[Code],
[Title],
(Select Title FROM Province WHERE Code=Province_Code) as Province
FROM
City
Application Manual
After you run the program, you must choose the destination database in the login form to generate required stored procedures.After login, you see the main form such as the above picture.
Update Contact :
No Wa/Telepon (puat) : 085267792168
No Wa/Telepon (fajar) : 085369237896
Email : Fajarudinsidik@gmail.com
No Wa/Telepon (puat) : 085267792168
No Wa/Telepon (fajar) : 085369237896
Email: Fajarudinsidik@gmail.com
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