[转载]Winform等待窗口的实现（附源代码）

在开发Winform程序的时候，经常会用到等待窗口（如网络通讯、数据库连接等需要一定时间来执行的操作），这样可以给用户提供更好的体验。

等待窗口的主要功能是一边执行需要等待的操作，一边显示一个等待界面。当执行完毕时等待界面消失。用户可以提前取消操作，还可以设置操作的最大等待时间，若超过指定时间仍没完成操作可结束当前操作。等待窗口的操作处理内容可用λ表达式，在后面的应用实例中可看到使用方法。

实现界面如下图：

等待界面主要包含的部分：

等待图片；
等待消息文字("正在处理数据，请稍后...")：可自定义；
计时器：可设置不显示；
取消返回按钮：可设置不显示；
另外等待窗口显示和关闭的时候都有渐变的一个简单特效，等待窗口的颜色是在一定范围内随即的。

等待窗口实现代码：

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

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 WinForm_Test

{

public partial class frmWaitingBox : Form

{

#region Properties

private int _MaxWaitTime;

private int _WaitTime;

private bool _CancelEnable;

private IAsyncResult _AsyncResult;

private EventHandler<EventArgs> _Method;

private bool _IsShown = true;

private readonly int _EffectCount = 10;

private readonly int _EffectTime = 500;

/// <summary>

/// 控制界面显示的特性

/// </summary>

private Timer _Timer;

public string Message { get; private set; }

public int TimeSpan { get; set; }

public bool FormEffectEnable { get; set; }

#endregion

#region frmWaitingBox

public frmWaitingBox(EventHandler<EventArgs> method,int maxWaitTime,string waitMessage,bool cancelEnable,bool timerVisable)

{

maxWaitTime *= 1000;

Initialize(method, maxWaitTime,waitMessage, cancelEnable, timerVisable);

}

public frmWaitingBox(EventHandler<EventArgs> method)

{

int maxWaitTime=60*1000;

string waitMessage = "正在处理数据，请稍后...";

bool cancelEnable=true;

bool timerVisable=true;

Initialize(method, maxWaitTime,waitMessage, cancelEnable, timerVisable);

}

public frmWaitingBox(EventHandler<EventArgs> method, string waitMessage)

{

int maxWaitTime = 60 * 1000;

bool cancelEnable = true;

bool timerVisable = true;

Initialize(method, maxWaitTime, waitMessage, cancelEnable, timerVisable);

}

public frmWaitingBox(EventHandler<EventArgs> method, bool cancelEnable, bool timerVisable)

{

int maxWaitTime = 60*1000;

string waitMessage = "正在处理数据，请稍后...";

Initialize(method, maxWaitTime,waitMessage, cancelEnable, timerVisable);

}

#endregion

#region Initialize

private void Initialize(EventHandler<EventArgs> method, int maxWaitTime,string waitMessage,bool cancelEnable, bool timerVisable)

{

InitializeComponent();

//initialize form

this.FormBorderStyle = FormBorderStyle.None;

this.StartPosition = FormStartPosition.CenterParent;

this.ShowInTaskbar = false;

Color[] c = GetRandColor();

this.panel1.BackColor = c[0];

this.BackColor = c[1];

this.labMessage.Text = waitMessage;

_Timer = new Timer();

_Timer.Interval = _EffectTime/_EffectCount;

_Timer.Tick += _Timer_Tick;

this.Opacity = 0;

FormEffectEnable = true;

//para

TimeSpan = 500;

Message = string.Empty;

_CancelEnable = cancelEnable;

_MaxWaitTime = maxWaitTime;

_WaitTime = 0;

_Method = method;

this.pictureBoxCancel.Visible = _CancelEnable;

this.labTimer.Visible = timerVisable;

this.timer1.Interval = TimeSpan;

this.timer1.Start();

}

#endregion

#region Color

private Color[] GetRandColor()

{

int rMax = 248;

int rMin = 204;

int gMax = 250;

int gMin = 215;

int bMax = 250;

int bMin = 240;

Random r = new Random(DateTime.Now.Millisecond);

int r1 = r.Next(rMin, rMax);

int r2 = r1 + 5;

int g1 = r.Next(gMin, gMax);

int g2 = g1 + 5;

int b1 = r.Next(bMin, bMax);

int b2 = b1 + 5;

Color c1 = Color.FromArgb(r1, g1, b1);

Color c2 = Color.FromArgb(r2, g2, b2);

Color[] c = { c1, c2 };

return c;

}

#endregion

#region Events

private void btnCancel_Click(object sender, EventArgs e)

{

this.Message = "您结束了当前操作！";

this.Close();

}

private void timer1_Tick(object sender, EventArgs e)

{

_WaitTime += TimeSpan;

this.labTimer.Text = string.Format("{0}秒", _WaitTime / 1000);

if (!this._AsyncResult.IsCompleted)

{

if (_WaitTime > _MaxWaitTime)

{

Message = string.Format("处理数据超时{0}秒，结束当前操作！", _MaxWaitTime / 1000);

this.Close();

}

else

{

this.Message = string.Empty;

this.Close();

}

private void frmWaitingBox_Shown(object sender, EventArgs e)

{

_AsyncResult = _Method.BeginInvoke(null, null, null, null);

//Effect

if (FormEffectEnable)

{

_Timer.Start();

}

else

this.Opacity = 1;

}

private void frmWaitingBox_FormClosing(object sender, FormClosingEventArgs e)

{

if (FormEffectEnable)

{

if(this.Opacity>=1)

e.Cancel = true;

_Timer.Start();

}

private void _Timer_Tick(object sender, EventArgs e)

{

if (_IsShown)

{

if (this.Opacity >= 1)

{

_Timer.Stop();

_IsShown = false;

}

this.Opacity += 1.00 / _EffectCount;

}

else

{

if (this.Opacity <= 0)

{

_Timer.Stop();

_IsShown = true;

this.Close();

}

this.Opacity -= 1.00 / _EffectCount;

}

#endregion

}

应用实例代码：

string res;

DataTable dt=null;

frmWaitingBox f = new frmWaitingBox((obj,args)=>

{

Thread.Sleep(5000);

string sql = "SELECT * FROM [test].[dbo].[studentInfo]";

SQLHelper sqlHelper=new SQLHelper();

dt = sqlHelper.ExecuteSqlStr(sql,out res);

});

f.ShowDialog(this);

dataGridView1.DataSource = dt;

源码下载：下载地址——（http://files.cnblogs.com/anding/WinForm_Test1.rar）

原文地址:http://www.cnblogs.com/anding/archive/2010/10/07/1845251.html

秒客网

[转载]Winform等待窗口的实现（附源代码）

相关文章