//Method to update data in database from our application
public bool Update(ContactClass c)
{
//Create a default return type and set its default value to false
bool isSuccess = false;
SqlConnection conn = new SqlConnection(myconnstring);
try
{
//Sql to update data in our Database
string sql = "UPDATE tbl_contact SET FirstName=@FirstName, LastName=@LastName, ContactNo=@ContactNo, Address=@Address, Gender=@Gender WHERE ContactID=@ContactID";
//Creating Sql Command
SqlCommand cmd = new SqlCommand(sql, conn);
//Creating Parameterss to add value
cmd.Parameters.AddWithValue("@FirstName", c.FirstName);
cmd.Parameters.AddWithValue("@LastName", c.LastName);
cmd.Parameters.AddWithValue("@ContactNo", c.ContactNo);
cmd.Parameters.AddWithValue("@Address", c.Address);
cmd.Parameters.AddWithValue("@Gender", c.Gender);
cmd.Parameters.AddWithValue("@ContactID", c.ContactID);
//Open Database Connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
//If the query runs succefully then value of rows will be greater than zero else its value will be zero
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
//Inserting Data into Database
public bool Insert(ContactClass c)
{
///Creating a default return type and setting its value to false
bool isSuccess = false;
//Step 1: Connect Database
SqlConnection conn = new SqlConnection(myconnstring);
try
{
///Step 2: Create a SQL query to insert Data
string sql = "INSERT INTO tbl_contact (FirstName, LastName, ContactNo, Address, Gender) VALUES (@FirstName, @LastName, @ContactNo, @Address, @Gender)";
//Creating SQL Command using sql and conn
SqlCommand cmd = new SqlCommand(sql, conn);
//Creating Parameters to add data
cmd.Parameters.AddWithValue("@FirstName", c.FirstName);
cmd.Parameters.AddWithValue("@LastName", c.LastName);
cmd.Parameters.AddWithValue("@ContactNo", c.ContactNo);
cmd.Parameters.AddWithValue("@Address", c.Address);
cmd.Parameters.AddWithValue("@Gender", c.Gender);
//Connection Open Here
conn.Open();
int rows = cmd.ExecuteNonQuery();
//If the query runs successfully then the value of rows will be greater than zero else its value will zero
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 value and set its value to false
bool isSuccess = false;
//Create SQL Connection
SqlConnection conn = new SqlConnection(myconnstring);
try
{
//SQL 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 successfully then value of rows will be greater than zero else its value will be zero
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
//Close Connection
conn.Close();
}
return(isSuccess);
}