.NET连接MongoDB数据库实例教程

public class Users1
{
public ObjectId Id { get; set; }
public string Name { get; set; }
public int Age { get; set; }
}
public class Users2
{
public ObjectId Id { get; set; }
public string Name { get; set; }
public string Location { get; set; }
}
public class Users3
{
public ObjectId Id { get; set; }
public string Name { get; set; }
public int Age { get; set; }
public string Location { get; set; }
}
private void rbEntity1_CheckedChanged(object sender, EventArgs e)
{
txtName.Enabled = true;
txtAge.Enabled = true;
txtLocation.Enabled = true;
}
private void rbEntity2_CheckedChanged(object sender, EventArgs e)
{
txtName.Enabled = true;
txtAge.Enabled = false;
txtLocation.Enabled = true;
}
private void rbEntity3_CheckedChanged(object sender, EventArgs e)
{
txtName.Enabled = true;
txtAge.Enabled = true;
txtLocation.Enabled = false;
}
private void btnSave_Click(object sender, EventArgs e)
{
if (rbEntity1.Checked)
{
var _users = _database.GetCollection<users3 />("users");
var user = new Users3 { };
user.Age = Convert.ToInt32(txtAge.Text);
user.Name = txtName.Text;
user.Location = txtLocation.Text;
_users.Insert(user);
var id = user.Id;
}
else if (rbEntity2.Checked)
{
var _users = _database.GetCollection<users2 />("users");
var user = new Users2 { };
user.Name = txtName.Text;
user.Location = txtLocation.Text;
_users.Insert(user);
var id = user.Id;
}
else if (rbEntity3.Checked)
{
var _users = _database.GetCollection<users1 />("users");
var user = new Users1 { };
user.Age = Convert.ToInt32(txtAge.Text);
user.Name = txtName.Text;
_users.Insert(user);
var id = user.Id;
}
MessageBox.Show("User with name " + txtName.Text + " created");
}

///下面的代码帮助你从Mongo数据库中查找一条现有记录。
_collection = _database.GetCollection<users1 />("users");
IMongoQuery query = Query.EQ("Name", "Anoop");
Users1 _user = _collection.FindAs<users1 />(query).FirstOrDefault();
MessageBox.Show(_user.Age.ToString());

///下面的代码帮助你更新Mongo数据库中的一条现有记录。
_collection = _database.GetCollection<users1 />("users");
IMongoQuery query = Query.EQ("Name", "Anoop");
Users1 _user = _collection.FindAs<users1 />(query).FirstOrDefault();
MessageBox.Show("Age before update :" + _user.Age.ToString());
//更新年龄的值
_user.Age = 30;

//保存更改
_collection.Save(_user);
MessageBox.Show("Age after update :" + _user.Age.ToString());