Winform实现登录窗体记住密码的功能

Winform实现登录窗体记住密码的功能，如图：





代码如下：

1、窗体Form1加载：

List<UserInfo> item=new List<UserInfo>();

UserInfo userInfo = new UserInfo();

BUserInfo bUserInfo = new BUserInfo();

Dictionary<string, UserInfo> users = new Dictionary<string, UserInfo>();

private void Form1_Load(object sender, EventArgs e)

{

FileStream fs = new FileStream("data.bin", FileMode.OpenOrCreate);

if (fs.Length > 0)

{

BinaryFormatter bf = new BinaryFormatter();

users = bf.Deserialize(fs) as Dictionary<string, UserInfo>;

foreach (UserInfo user in users.Values)

{

comboBox1.Items.Add(user.UserName);

}

for (int i = 0; i < users.Count; i++)

{

if (comboBox1.Text != "")

{

if (users.ContainsKey(comboBox1.Text))

{

textBox2.Text = users[comboBox1.Text].UserPwd;

checkBox1.Checked = true;

}

}

}

}

fs.Close();

item = (List<UserInfo>)bUserInfo.GetAll();

comboBox1.DataSource = item;

comboBox1.DisplayMember = "UserName";

}

2、选择用户名：

private void comboBox1_SelectedValueChanged(object sender, EventArgs e)

{

FileStream fs = new FileStream("data.bin", FileMode.OpenOrCreate);

if (fs.Length > 0)

{

BinaryFormatter bf = new BinaryFormatter();

users = bf.Deserialize(fs) as Dictionary<string, UserInfo>;

for (int i = 0; i < users.Count; i++)

{

if (comboBox1.Text != "")

{

if (users.ContainsKey(comboBox1.Text) && users[comboBox1.Text].UserPwd != "")

{

textBox2.Text = users[comboBox1.Text].UserPwd;

checkBox1.Checked = true;

}

else

{

textBox2.Text = "";

checkBox1.Checked = false;

}

}

}

}

fs.Close();

}