C#winform练习(2)

txtWords.Visible = false; }

private void butLogin_Click(object sender, EventArgs e) {

string name = txtName.Text.Trim(); string pwd = txtPwd.Text;

if (name == \ && pwd == \) {

//txtWords.WordWrap = true; btnWords.Visible = true; btnSave.Visible = true; txtWords.Visible = true;

label1.Visible = false; label2.Visible = false; butLogin.Visible = false; butReset.Visible = false; txtName.Visible = false; txtPwd.Visible = false; MessageBox.Show(\登陆成功！\); } else {

MessageBox.Show(\用户名或密码错误，请重新输入！\); txtName.Clear(); txtPwd.Clear(); txtName.Focus(); } }

///

///

private void butReset_Click(object sender, EventArgs e) {

txtName.Clear(); txtPwd.Clear(); txtName.Focus(); }

///

///

private void btnWords_Click(object sender, EventArgs e) {

if (btnWords.Text == \自动换行\) {

txtWords.WordWrap = true; btnWords.Text = \取消自动换行\; }

else if (btnWords.Text == \取消自动换行\) {

txtWords.WordWrap = false; btnWords.Text = \自动换行\; }

}

///

///

private void btnSave_Click(object sender, EventArgs e) {

using (FileStream fsWrite = new FileStream(@\桌面\\new.txt\, FileMode.OpenOrCreate, FileAccess.Write)) {

string str = txtWords.Text.Trim();

byte[] buffer = System.Text.Encoding.Default.GetBytes(str); fsWrite.Write(buffer, 0, buffer.Length); }

MessageBox.Show(\保存成功\); } } }

//6.老师或者学生登陆

//在窗体中拖入2个label控件2个textBox控件2个radiobutton和1个button控件如下图：

using System;

using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text;

using System.Windows.Forms;

namespace 学生或者老师登陆 {

public partial class Form1 : Form {

public Form1() {

InitializeComponent(); }

private void btn_Click(object sender, EventArgs e) {

if (rdostudent.Checked || rdoteacher.Checked) {

string name = txtName.Text.Trim(); string pwd = txtPwd.Text; if (rdostudent.Checked) {

if (name == \ && pwd == \) {

MessageBox.Show(\登陆成功\); } else {

MessageBox.Show(\登陆失败\); txtName.Clear(); txtPwd.Clear(); txtName.Focus(); } } else {

if (name == \ && pwd == \) {

MessageBox.Show(\登陆成功\); }

else {

MessageBox.Show(\登陆失败\); txtName.Clear(); txtPwd.Clear(); txtName.Focus(); } } } else {

MessageBox.Show(\请首先选择登陆身份\); } } } }

//7.父(MDI)窗口练习在form1主窗口中放置菜单：\显示子窗体\横向排列\纵向排列\//依次创建4个窗体在form1窗体 form1窗体：

isMdiContainer:true 添加MenuStrip工具

如下图：

using System;

using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text;

using System.Threading.Tasks; using System.Windows.Forms;

namespace MDI窗体设计 {

public partial class Form1 : Form

{

public Form1() {

InitializeComponent(); }

private void 纵向排列ToolStripMenuItem_Click(object sender, EventArgs e) {

LayoutMdi(MdiLayout.TileVertical); }

private void 横向排列ToolStripMenuItem_Click(object sender, EventArgs e) {

LayoutMdi(MdiLayout.TileHorizontal); }

private void 显示子窗体ToolStripMenuItem_Click(object sender, EventArgs e) {

Form2 frm2 = new Form2(); frm2.MdiParent = this; frm2.Show();

Form3 frm3 = new Form3(); frm3.MdiParent = this; frm3.Show();

Form4 frm4 = new Form4(); frm4.MdiParent = this; frm4.Show(); } } }

//8.实现图片的上翻下翻

在窗中拖放入pictureBox工具两个botton按钮工具如下图 botton1:

Text:上一张 Text:下一张

botton2:

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