c# winform参考代码片段

获取TextBox内容

string name = this.txtName.Text;
string remark = this.txtRemark.Text;
if (name.Contains(" ")) {
    MessageBox.Show("用户名不能包含空格!","内容非法");
    return;
}

if (name.Length < 6) {
    MessageBox.Show("用户名不能少于6个字符!","内容非法");
    return;
}

string info = name + "\r\n" + pwd + "\r\n" + remark;

设置 TextBox内容

this.txtFirst.Text = info;

MessageBox显示

MessageBox.Show("密码不能少于6个字符!", "内容非法");

DialogResult dr = MessageBox.Show("你确实要取消注册吗?","确认取消",
    MessageBoxButtons.YesNo,
    MessageBoxIcon.Question);

if (dr == DialogResult.Yes)
{
    Application.Exit();

}
else {
    this.txtName.Text = "";
    this.txtPwd.Text = "";
    this.txtRemark.Text = "";
}

显示窗口面板

frmShow frmshow = new frmShow();
frmshow.Show();

获得listBox的所有内容

public string _name;
int i = listBox1.SelectedIndex;
listBox1.Items[i] = f2._name;
listBox2.Items.Add(name);
string name = this.listBox1.Text;

foreach (string str in listBox2.Items)
{
    if (str == name)
    {
        n++;
    }
}

类的构造函数

namespace CommunicationForm
{
    public partial class frmSecond : Form
    {
        private frmFirst ff = null;
        public frmSecond()
        {
            InitializeComponent();
        }
        //
        public frmSecond(frmFirst frmfirst)
        {
            InitializeComponent();
            this.ff = frmfirst;
        }
        //
        public void SetInfo(string info) {
            this.txtSecond.Text = info ;
        }

        private void btnChange_Click(object sender, EventArgs e)
        {
            ff.SetInfo(this.txtSecond.Text);
        }
    }
}