// Method to update data in database
public bool Update(ContactClass c)
{
// Create a default return type and set its default value to false
bool isSuccess = false;
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
// SQL to update data in hour database
string sql = "UPDATE tbl_contact SET FirstName=@FirstName, LastName=@LastName, Phone=@Phone, Email=@Email, Note=@Note, Status=@Status WHERE ContactID=@ContactID";
// Creating SQL command
SqlCommand cmd = new SqlCommand(sql, conn);
// Create Parameters to add value
cmd.Parameters.AddWithValue("@FirstName", c.FirstName);
cmd.Parameters.AddWithValue("@LastName", c.LastName);
cmd.Parameters.AddWithValue("@Phone", c.Phone);
cmd.Parameters.AddWithValue("@Email", c.Email);
cmd.Parameters.AddWithValue("@Note", c.Note);
cmd.Parameters.AddWithValue("@Status", c.Status);
cmd.Parameters.AddWithValue("@ContactID", c.ContactID);
// Open database connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs succesfully then the value of rows > 0 else its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
// Inserting into database
public bool Insert(ContactClass c)
{
// Creating a default returntype and setting its value to false
bool isSuccess = false;
// Step 1. Connect database
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
// Step 2: Create a SQL query to insert data
string sql = "INSERT INTO tbl_contact (FirstName, LastName, Phone, Email, Note, Status) VALUES(@FirstName, @LastName, @Phone, @Email, @Note, @Status)";
// Creating SQL Command using sql and conn
SqlCommand cmd = new SqlCommand(sql, conn);
// Create Parameters to add data
cmd.Parameters.AddWithValue("@FirstName", c.FirstName);
cmd.Parameters.AddWithValue("@LastName", c.LastName);
cmd.Parameters.AddWithValue("@Phone", c.Phone);
cmd.Parameters.AddWithValue("@Email", c.Email);
cmd.Parameters.AddWithValue("@Note", c.Note);
cmd.Parameters.AddWithValue("@Status", c.Status);
// Connection Open here
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs succesfully then the value is > 0, else the value will be < 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
// Method to delete data from database
public bool Delete(ContactClass c)
{
// create a default return value and set its value to false
bool isSuccess = false;
// Create SQL Connection
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
// Method to delete data
string sql = "DELETE FROM tbl_contact WHERE ContactID=@ContactID";
// Creating SQL command
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@ContactID", c.ContactID);
// Open Connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
// if the query runs succesfully then the value of rows will be > 0 , else the value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
// Close connection
conn.Close();
}
return(isSuccess);
}
