//method do delete from DB
public bool Delete(contactClass c)
{
bool isSuccess = false;
SqlConnection conn = new SqlConnection(myconnstr);
try
{
//step 2: create a SQL query
string sql = "DELETE FROM tbl_contact WHERE ContactID=@ContactID";
SqlCommand cmd = new SqlCommand(sql, conn);
//create peremeters to add value
cmd.Parameters.AddWithValue("ContactID", c.ContactID);
//connection Open here
conn.Open();
int rows = cmd.ExecuteNonQuery();
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
conn.Close();
}
return(isSuccess);
}
//method do update Data in DB
public bool Update(contactClass c)
{
bool isSuccess = false;
SqlConnection conn = new SqlConnection(myconnstr);
try
{
//step 2: create a SQL query
string sql = "UPDATE tbl_contact SET FirstName=@FirstName, LastName=@LastName, ContactNo=@ContactNo, Address=@Address, Gender=@Gender WHERE ContactID=@ContactID";
SqlCommand cmd = new SqlCommand(sql, conn);
//create peremeters 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);
//connection Open here
conn.Open();
int rows = cmd.ExecuteNonQuery();
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
conn.Close();
}
return(isSuccess);
}
//inserting Data into DB
public bool Insert(contactClass c)
{
/* //creating default return type
* bool isSuccess = false;
*
* //step 1: connect DB
* SqlConnection conn = new SqlConnection(myconnstr);
* try
* {
* //step 2: create a SQL query
* string sql = "INSERT INTO tbl_contact (FirstName, LastName, ContactNo, Address, Gender) VALUES (@FirstName, @LastName, @ContactNo, @Address, @Gender)";
* SqlCommand cmd = new SqlCommand(sql, conn);
* //create peremeters 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 (rows > 0)
* {
* isSuccess = true;
* }
* else
* {
* isSuccess = false;
* }
* }
* catch (Exception ex)
* {
*
* }
* finally
* {
* conn.Close();
* }
*
*
*
* return isSuccess;*/
bool isSuccess = false;
//STep 1: Connect DAtabase
SqlConnection conn = new SqlConnection(myconnstr);
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);
//Create 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();
if ((string.IsNullOrEmpty(FirstName) && string.IsNullOrEmpty(LastName) &&
string.IsNullOrEmpty(ContactNo) && string.IsNullOrEmpty(Address) && string.IsNullOrEmpty(Gender)))
{
conn.Close();
}
int rows = cmd.ExecuteNonQuery();
//If the query runs successfully then the value of rows will be greater than zero else its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
conn.Close();
}
return(isSuccess);
}
