markdown C＃T-Sql

Posted 2021-05-05

* Config connection string:
```c#
string connetionString = @"Data Source={source};AttachDbFilename={path};Integrated Security=True";
SqlConnection sqlCon = new SqlConnection(connetionString);
sqlCon.Open();
```

* Execute Query:
```c#
sql = "<SQL HERE>";
sqlCmd = new SqlCommand(sql, sqlCon);
sqlCmd.ExecuteNonQuery();
```
* Fill Data Grid View:
```c#
dataGridView1.DataSource = cmd.ExecuteReader();
```

* Itereate in Query Result:
```c#
sql = "SELECT * FROM Notes";
sqlCmd = new SqlCommand(sql, sqlCon);
SqlDataReader dataReader = sqlCmd.ExecuteReader();

while (dataReader.Read())
{
  ID.Add(Convert.ToInt32(dataReader[0].ToString()));
  NoteString.Add(dataReader[1].ToString());
}

dataReader.Close();
```