【C#常用操作】

excel相关操作

using Excel = Microsoft.Office.Interop.Excel;public Excel.Application app;
public Excel.Workbooks wbs;
public Excel.Workbook wb;
public Excel.Worksheets wss;
public Excel.Worksheet ws;/// <summary>
/// 取得打开excel句柄
/// </summary>
/// <param name="pathfilename">打开文件路径</param>
public void excel_Open(string pathfilename)
{app = new Microsoft.Office.Interop.Excel.Application();wb = app.Workbooks.Open(pathfilename,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing);
}
/// <summary>
/// 释放句柄，并关闭excel进程
/// </summary>
public void excel_ReleaseResource()
{app.DisplayAlerts = false;     //保存Excel的时候，不弹出是否保存的窗口直接进行保存 app.AlertBeforeOverwriting = false;wb.Save();app.Quit();wb = null;wbs = null;GC.Collect();//垃圾回收Kill(app);app = null;
}/// <summary>
/// 引用dll接口
/// </summary>
/// <param name="hwnd">句柄</param>
/// <param name="ID">进程ID</param>
/// <returns></returns>
[DllImport("User32.dll", CharSet = CharSet.Auto)]
public static extern int GetWindowThreadProcessId(IntPtr hwnd,out int ID);
/// <summary>
/// 关闭进程
/// </summary>
/// <param name="excel">excel应用变量</param>
public static void Kill(Microsoft.Office.Interop.Excel.Application excel)
{   IntPtr t=new IntPtr(excel.Hwnd);//得到这个句柄，具体作用是得到这块内存入口 int k= 0;   GetWindowThreadProcessId(t,out k);   //得到本进程唯一标志kSystem.Diagnostics.Process p=System.Diagnostics.Process.GetProcessById(k);   //得到对进程k的引用p.Kill();     //关闭进程k
}//向excel中插入图片
public void excel_setImage()
{//读取图片System.Drawing.Image myimage = Image.FromFile(PicPath+strPictureName+".png");System.Drawing.Size size = new Size(myimage.Width, myimage.Height);string imagewidth = size.Width.ToString();//图片的宽度string imagehight = size.Height.ToString();//图片的高度excel_Open(strExcelPath);ws = (Excel.Worksheet)wb.Sheets[2];((Excel.Range)ws.Cells[1][1]).Select();((Excel.Range)ws.Cells[1][1]).Activate();((Excel.Range)ws.Cells[1][1]).RowHeight = 100;float PicLeft, PicTop;//为了图片能够适应单元格的宽高进行的转换PicLeft = Convert.ToSingle(((Excel.Range)ws.Cells[1][1]).Left);PicTop = Convert.ToSingle(((Excel.Range)ws.Cells[1][1]).Top);ws.Shapes.AddPicture(strImagePath, Office.Core.MsoTriState.msoFalse, Office.Core.MsoTriState.msoTrue, PicLeft, PicTop, iWidth, iHight);app.DisplayAlerts = false;     //保存Excel的时候，不弹出是否保存的窗口直接进行保存 app.AlertBeforeOverwriting = false;wb.Save();app.Quit();wb = null;wbs = null;GC.Collect();//垃圾回收Kill(app);app = null;
}

sheet操作

ws = (Excel.Worksheet)wb.Worksheets["Sheet1"];ws = (Excel.Worksheet)wb.Sheets[1];

range/cell操作

Excel.Range range = ws.Range[ws.Cells[1, 1], ws.Cells[10, 10]];int rowsint = ws.Range["C65535"].End[Excel.XlDirection.xlUp].Row;//取得有效数据的行数
int columnsint = ws.Range["IV4"].End[Excel.XlDirection.xlToLeft].Column;//取得有效数据的列数
(Excel.Range)ws.Cells[1, 1]).Text//取得或赋值单元格内容//单元格底色
((Excel.Range)ws.Cells[1, 1]).Interior.ColorIndex = 3;

操作已打开的excel

Workbooks xlBooks;
Workbook xlBook;
Worksheet xlSheet;public void excel_Test()
{// 声明一个对象Excel._Application objExcel;objExcel = (Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");objExcel.Visible = true;xlBooks = objExcel.Workbooks;var numBooks = xlBooks.Count;//大于0说明有多个excel被打开if (numBooks > 0){//第一个一般是最后被激活的那个excelxlBook = xlBooks[1];// 这里要注意，一定要使用被激活的sheet，否则后续这个sheet句柄无法进行操作xlSheet = (Worksheet)xlBook.ActiveSheet;//range不能直接用//xlSheet.Range[1, 1].Select(); 错误xlSheet.Cells[1, 1].Select();}
}

其他常用处理

//延时处理
public static void Delay(int milliSecond)
{int start = Environment.TickCount;while (Math.Abs(Environment.TickCount - start) < milliSecond)//毫秒{System.Windows.Forms.Application.DoEvents();//可执行某无聊的操作}
}

richTextBox处理

//避免修改部分文字后，再显示其它文字时，颜色全部变成最后设置的颜色，先全转成黑色
richTextBox1.SelectAll();
richTextBox1.SelectionColor = Color.Black;//设置部分文字颜色
richTextBox1.SelectionStart = 0;
richTextBox1.SelectionLength = 1;
richTextBox1.SelectionColor = Color.Red;

API使用方法可以参照官网：

https://learn.microsoft.com/zh-cn/office/vba/api