第一次C#界面编程备忘总结
第一次C#界面编程备忘总结
1、给一个按钮“浏览”增加save/open-Dialog对话框
“浏览”中的程序：
//仅仅是把对话框读到的路径显示到openPath.Text中去
if(openFileDialog1.ShowDialog() == DialogResult.OK)
openPath.Text = openFileDialog1.FileName;
//通过open-Dialog的FileOk事件(点击"保存"或双击文件)打开某种文件
usingSystem.Diagnostics
{
System.IO.FileInfooppen1 =
newSystem.IO.FileInfo(openFileDialog1.FileName);
Processpro = new Process();
pro.StartInfo.FileName= openFileDialog1.FileName;
pro.StartInfo.WorkingDirectory= oppen1.DirectoryName;
pro.Start();
}
2、MessageBox
MessageBox.Show(this,"串口已被占用!", "提示",MessageBoxButtons.OK, MessageBoxIcon.Information);
“串口...+Environment.NewLine + ..." (Environment.NewLine 表示回车)
Buttons还有别的组合
返回值的使用: //显示信息框并得到返回值
System.Windows.Forms.DialogResultrt = MessageBox.Show(...);
返回类型有:
DialogResult.Yes//DialogResult.No//DialogResult.Cancel//DialogResult.No
3、倒计时
添加个interval=1000(默认单位ms)的定时器:timer_timeDisplay
定义个时间的数组timeDisplay[],从界面获取倒计时的总时间timeSum
int[] timeDisplay= new int[3];
Int timeSum;
//"开始"中初步处理代码:
...
timeDisplay[0] =(int)timeSum;
timeDisplay[1] =(int)(60 * (timeSum - timeDisplay[0]));
timeDisplay[2] =(int)(60*(60*(timeSum - timeDisplay[0])
- timeDisplay[1]));
if (timeDisplay[2] ==0 && timeDisplay[1] != 0)
{
timeDisplay[2]= 60;
timeDisplay[1]--;
}
else if (timeDisplay[2] == 0 &&timeDisplay[1] == 0)
{
timeDisplay[2]= 60;
timeDisplay[1]= 59;
timeDisplay[0]--;
}
timer_timeDisplay.Start();
...
//倒计时显示
privatevoid timer_timeDisplay_Tick(object sender, EventArgs e)
{
timeSum--;
if (timeDisplay[2] != 0)
{
timeDisplay[2]--;
timeDisplay.Text = timeDisplay[0] +"时" + timeDisplay[1] + "分" +timeDisplay[2] + "秒";
}
if (timeDisplay[2] == 0 &&timeDisplay[1] != 0)
{
timeDisplay.Text = timeDisplay[0] +"时" + timeDisplay[1] + "分" + 00+ "秒";
timeDisplay[1]--;
timeDisplay[2] = 60;
}
if (timeDisplay[0] != 0 &&timeDisplay[1] == 0 && timeDisplay[2] == 0)
{
timeDisplay.Text = timeDisplay[0] +"时" + 00 + "分" + timeDisplay[2]+ "秒";
timeDisplay[0]--;
timeDisplay[1] = 59;
timeDisplay[2] = 60;
}
if (timeDisplay[0] == 0 &&timeDisplay[1] == 0 && timeDisplay[2] == 0)
{
timer_timeDisplay.Stop();
MessageBox.Show(this, "时间到,测试结束 " + Environment.NewLine+ "您可选择其他操作!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
timeDisplay[0] = (int)timeSum;
timeDisplay[1] = (int)(60 * (timeSum- timeDisplay[0]));
timeDisplay[2] = (int)(60*(60*(timeSum -timeDisplay[0]) - timeDisplay[1]));
}
}
4、获取路径文件名
private string GetFileName(string path)
{
int start, end;
start =path.LastIndexOf(@"\");
end = path.LastIndexOf(".");//如果有扩展名时
if (end < start) path =path.Substring(start + 1);
else path = path.Substring(start +1, end - start - 1);
return path;
}
5、连接已有模版数据库文件
usingSystem.Data.OleDb;//对数据库操作时要添加
using System.Runtime.InteropServices;
publicOleDbConnection connData = new OleDbConnection
("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" +
System.Windows.Forms.Application.StartupPath + @"\test.mdb");
public OleDbCommandcmd = new OleDbCommand();
//连接数据库,并写入通过串口收到的数据
private voidDataToAccess(int times1, string voltage1, string dB_dBm1)
{
cmd.CommandText= "Insert Into testdata(num,voltage,dB_dBm)
Values('" + times1 +"','" + voltage1 + "','" + dB_dBm1 + "')";
cmd.Connection= connData;
connData.Open();
cmd.ExecuteNonQuery();
cmd.Dispose();
connData.Close();
}
6、拷贝模版数据库文件到用户指定path
try
{
System.IO.File.Copy(System.Windows.Forms.Application.StartupPath+ @"\test.mdb", path.Text);
connData.ConnectionString= "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path.Text;
}
catch(System.IO.IOException)//如果目标文件已经存在
{
System.IO.File.Copy(System.Windows.Forms.Application.StartupPath+ @"\test.mdb", path.Text, true);
connData.ConnectionString= "Provider=Microsoft.Jet.OLEDB.4.O;Data Source=" + path.Text;
}
7、将Access文件导入Excel文件
要先添加引用/COM/Microsoft Exccel 11.0 ObjectLibrary
usingMicrosoft.Office.Interop.Excel;
public boolDataToExcel(System.Data.DataTable mytb, string savepath)
{
string[]header = new string[3] { "num", "voltage","dB_dBm" };
//建立Excel对象
Microsoft.Office.Interop.Excel.Applicationmyexcel;
Microsoft.Office.Interop.Excel._Workbookmybook;
Microsoft.Office.Interop.Excel._Worksheetmysheet = null;
myexcel =new Microsoft.Office.Interop.Excel.ApplicationClass();
mybook =myexcel.Workbooks.Add(true);
mysheet =(Microsoft.Office.Interop.Excel._Worksheet)mybook.ActiveSheet;
//添加表头
myexcel.Cells[1,1] = "采样时间间隔:";
myexcel.Cells[1,3] = ts.Text + " s";
myexcel.Cells[2,1] = "采样总时间:";
myexcel.Cells[2,3] = th.Text + " h";
for (intcolomn = 0; colomn < 3; colomn++)
myexcel.Cells[4,colomn + 1] = header[colomn];
//填充数据到Excel(从Access第二行开始导入)
for (int i= 1; i < mytb.Rows.Count; i++)
{
for (int j= 0; j < 3; j++)
myexcel.Cells[i+ 4, j + 1] = mytb.Rows[i][j].ToString();
}
mybook.SaveCopyAs(savepath);
mybook.Saved= true;
//退出excel
myexcel.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(mybook);
System.Runtime.InteropServices.Marshal.ReleaseComObject(myexcel);
System.Runtime.InteropServices.Marshal.ReleaseComObject(mysheet);
mybook =null;
myexcel =null;
mysheet =null;
GC.Collect();
MessageBox.Show(this,"导出EXCEL成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
returntrue;
}
{
OleDbConnectionconnData1 = new OleDbConnection
("Provider=Microsoft.Jet.OLEDB.4.0;DataSource=" +
System.Windows.Forms.Application.StartupPath + @"\test.mdb");
OleDbCommand cmd1 = new OleDbCommand("SELECT[num],[voltage],[dB_dBm] from testdata ", connData1);
OleDbDataAdapter data1 = new OleDbDataAdapter(cmd1); //数据适配器
dataTab.Clear(); //释放表空间
data1.Fill(dataTab);
DataToExcel(dataTab, saveFileDialog2.FileName);
}