Winform常用的一些功能收集（持续更新）

#region progressBar实时显示进度
private void button1_Click(object sender, EventArgs e)
{
int i = 10000;
progressBar1.Minimum = 0;
progressBar1.Maximum = i;
for (int k = 0; k < i; k++)
{
progressBar1.Value += 1;
Application.DoEvents();  //label1实时显示,而非处理完成后再显示
label1.Text = progressBar1.Value.ToString() ;
}
}
#endregion

#region 打开文件选择对话框
private void menuFileLoad_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
dlg.Title = "Open Photo";
dlg.Filter = "jpg files(*.jpg)|*.jpg|All files(*.*)|*.*";
if (dlg.ShowDialog() == DialogResult.OK)
{
try
{
pbxPhoto.Image = new Bitmap(dlg.OpenFile());
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}

}
dlg.Dispose();
}
#endregion

#region 菜单选中或可选
private void menuImage_DropDownOpening(object sender, EventArgs e)
{
ProcessImageOpening(sender as ToolStripDropDownItem);
}

private void ProcessImageOpening(ToolStripDropDownItem parent)
{
if (parent != null)
{
string enumval = pbxPhoto.SizeMode.ToString();
foreach (ToolStripMenuItem item in parent.DropDownItems)
{
item.Enabled = (pbxPhoto.Image != null);
item.Checked = item.Tag.Equals(enumval);
}
}
}
#endregion

#region Timer控件定时操作
private void button3_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
timer1.Interval = 1000;//1秒1次
timer1.Tick += new EventHandler(tmr_Tick);
timer1.Start();
}

private void tmr_Tick(object sender, EventArgs e)
{
//到达设定时间后的事件
label1.Text = DateTime.Now.ToString() + "执行了";
}

private void button4_Click(object sender, EventArgs e)
{
timer1.Enabled = false;
}
#endregion

//ListView新增列
listView1.Columns.Add("年龄", 100, HorizontalAlignment.Center);
listView1.Columns.Add("班级", 80, HorizontalAlignment.Center);
listView1.Columns.Add("性别", 40, HorizontalAlignment.Center);
listView1.Columns.Add("职业", 100, HorizontalAlignment.Center);
button5.Enabled = false;

//ListView新增行 批量更新防闪烁
listView1.BeginUpdate();
listView1.Items.Add("row1", "张三", 0);
listView1.Items["row1"].SubItems.Add("21");
listView1.Items["row1"].SubItems.Add("98001");
listView1.Items["row1"].SubItems.Add("男");
listView1.Items["row1"].SubItems.Add("学生");

listView1.Items.Add("row2", "李四", 0);
listView1.Items["row2"].SubItems.Add("22");
listView1.Items["row2"].SubItems.Add("98002");
listView1.Items["row2"].SubItems.Add("女");
listView1.Items["row2"].SubItems.Add("教师");

listView1.Items.Add("row3", "王五", 0);
listView1.Items["row3"].SubItems.Add("23");
listView1.Items["row3"].SubItems.Add("98003");
listView1.Items["row3"].SubItems.Add("男");
listView1.Items["row3"].SubItems.Add("工程师");

listView1.Items.Add("row4", "赵六", 0);
listView1.Items["row4"].SubItems.Add("24");
listView1.Items["row4"].SubItems.Add("98004");
listView1.Items["row4"].SubItems.Add("女");
listView1.Items["row4"].SubItems.Add("公务员");
listView1.EndUpdate();

//设置ListView属性
listView1.GridLines = true;
listView1.View = View.Details;
listView1.LabelEdit = false;
listView1.HeaderStyle = ColumnHeaderStyle.Clickable;

//更改行颜色
for (int i = 0; i < listView1.Items.Count; i++)
{
if (i % 2==0)
{
listView1.Items[i].BackColor = Color.Gray;
}
}

listView1.Items.Clear(); //清除列表内容 不包含表头

listView1.Clear(); //清除列表包含表头

//画直线
Graphics g = CreateGraphics();
Pen p = new Pen(Color.Gray);
g.DrawLine(p, 0, this.Height / 2, this.Width, this.Height / 2);

//画矩形
g.DrawRectangle(p, 50, 50, 200, 100);

//画圆形
g.DrawEllipse(p, 100, 100, 100, 100);

//画圆柱体
int height = this.ClientSize.Height - 200;
int width = this.ClientSize.Width - 50;
int vHeight = 200;
int vWidth = 100;
g.Clear(Color.White);
SolidBrush brush = new SolidBrush(Color.Gainsboro);
for (int i = height / 2; i > 0; i--)
{
g.DrawEllipse(p, width / 2, i, vHeight, vWidth);
}
g.FillEllipse(brush, width / 2, 0, vHeight, vWidth);

//释放资源
p.Dispose();
g.Dispose();

//读取图片
//Bitmap bmap = new System.Drawing.Bitmap(@"c:\1.jpg");
Bitmap bmap = (Bitmap)System.Drawing.Image.FromFile(@"c:\1.jpg");
//加载图片
Graphics g = Graphics.FromImage(bmap);
//定义字体
Font drawFont = new Font("Arial", 10, FontStyle.Bold, GraphicsUnit.Millimeter);
//定义画笔
SolidBrush drawBrush = new SolidBrush(Color.Red);
//定义坐标
int xPos = bmap.Height - (bmap.Height - 25);
int yPos = 3;
//绘制文字
g.DrawString("清纯美女", drawFont, drawBrush, xPos, yPos);
//保存图片
bmap.Save(@"c:\2.jpg");
//释放资源
bmap.Dispose();
g.Dispose();

private void btnExport_Click(object sender, EventArgs e)
{
//获取用户选择路径  导出Execl
SaveFileDialog SaveFile = new SaveFileDialog();
SaveFile.Filter = "Miscrosoft Office Excel 97-2003 工作表|*.xls|所有文件(*.*)|*.*";
SaveFile.RestoreDirectory = true;
if (SaveFile.ShowDialog() == DialogResult.OK)
{
string targetPath = SaveFile.FileName;
if (File.Exists(targetPath)) { File.Delete(targetPath); } File.Copy(fileSource, SaveFile.FileName);
DialogResult r = MessageBox.Show ("导出数据成功！" , "系统信息" , MessageBoxButtons.OK , MessageBoxIcon.Information ) ;
if (r == DialogResult.OK)
{
System.Diagnostics.Process.Start(SaveFile.FileName);
}
}
}