C#前期绑定和后期绑定操作Excel-------实现简单打印功能
1，前期绑定
前期绑定需要引用Microsoft.Office.Interop.Excel.dll，代码有提示功能，编写方便，且代码量小。但是和具体的office版本密切相关，不同版本的Excel可能会出现不兼容。
using System;
using System.Collections.Generic;
using System.Text;
using Excel = Microsoft.Office.Interop.Excel;
namespace ExcelCsharpTest
{
class ExcelPrintNomal
{
public void PrintOut(string excelFileName)
{
object Missing = System.Reflection.Missing.Value;
Excel.Application objExcel = null;
Excel.Workbooks objWorkbooks = null;
Excel.Workbook objWorkbook = null;
Excel.Worksheet objWorkSheet = null;
try
{
objExcel = new Microsoft.Office.Interop.Excel.Application();
}
catch
{
throw new Exception("没有安装Microsoft Office Excel。");
}
if (!System.IO.File.Exists(excelFileName))
{
throw new Exception("Excle文件不存在。");
}
try
{
objExcel.DisplayAlerts = false;
objExcel.WindowState = Microsoft.Office.Interop.Excel.XlWindowState.xlMinimized;
objExcel.Visible = false;
objWorkbooks = objExcel.Workbooks;
objWorkbook = objExcel.Workbooks.Open(excelFileName, Missing, Missing, Missing, Missing, Missing, Missing, Missing,
Missing, Missing, Missing, Missing, Missing, Missing, Missing);
objWorkSheet = (Excel.Worksheet)objWorkbook.Worksheets[1];
SetValue(objWorkSheet, 1, 1, "Cell_11");
SetValue(objWorkSheet, 1, 2, "Cell_12");
SetValue(objWorkSheet, 1, 3, "Cell_13");
objWorkSheet.PrintOut(Missing, Missing, 1, Missing, Missing, Missing, true, Missing);
}
catch (Exception ex)
{
throw ex;
}
finally
{
ReleaseComObj(objWorkSheet);
if (objWorkbook != null)
{
objWorkbook.Close(false, Missing, Missing);
ReleaseComObj(objWorkbook);
}
if (objWorkbooks != null)
{
objWorkbooks.Close();
ReleaseComObj(objWorkbooks);
}
if (objExcel != null)
{
objExcel.Quit();
ReleaseComObj(objExcel);
}
System.GC.Collect();
}
}
public void SetValue(Excel.Worksheet sheet, int row, int col, object value)
{
object cell;
Excel.Range range;
cell = sheet.Cells[row, col];
range = sheet.get_Range(cell, cell);
range.Value2 = value;
ReleaseComObj(cell);
ReleaseComObj(range);
}
public void ReleaseComObj(object objCom)
{
if (objCom != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(objCom);
objCom = null;
}
}
}
}
2，后期绑定
后期绑定，利用反射实现。不需引用dll，也和机器上安装的office版本无关，excel2003，excel2007都能正常运行。灵活性很强，但是可以看出代码不够方便，编写量也比前期绑定稍大。
using System;
using System.Collections.Generic;
using System.Text;
using Excel = Microsoft.Office.Interop.Excel;
namespace ExcelCsharpTest
{
class ExcelPrint
{
public void PrintOut(string excelFileName)
{
object Missing = System.Reflection.Missing.Value;
object objExcel = null;
object objWorkbooks = null;
object objWorkbook = null;
object objWorkSheet = null;
object[] parameters = null;
try
{
objExcel = Activator.CreateInstance(Type.GetTypeFromProgID("Excel.Application"));
}
catch
{
throw new Exception("没有安装Microsoft Office Excel。");
}
if (!System.IO.File.Exists(excelFileName))
{
throw new Exception("Excle文件不存在。");
}
try
{
const int xlMinimized = -4140;
parameters = new object[1];
parameters[0] = false;
objExcel.GetType().InvokeMember("DisplayAlerts", System.Reflection.BindingFlags.SetProperty, null, objExcel, parameters);
parameters = new object[1];
parameters[0] = xlMinimized;
objExcel.GetType().InvokeMember("WindowState", System.Reflection.BindingFlags.SetProperty, null, objExcel, parameters);
parameters = new object[1];
parameters[0] = false;
objExcel.GetType().InvokeMember("Visible", System.Reflection.BindingFlags.SetProperty, null, objExcel, parameters);
objWorkbooks = objExcel.GetType().InvokeMember("WorkBooks", System.Reflection.BindingFlags.GetProperty, null, objExcel, null);
parameters = new object[1];
parameters[0] = excelFileName;
objWorkbook = objWorkbooks.GetType().InvokeMember("Open", System.Reflection.BindingFlags.InvokeMethod, null, objWorkbooks, parameters);
parameters = new object[1];
parameters[0] = 1;
objWorkSheet = objWorkbook.GetType().InvokeMember("Worksheets", System.Reflection.BindingFlags.GetProperty, null, objWorkbook, parameters);
SetValue(objWorkSheet, 1, 1, "Cell_11");
SetValue(objWorkSheet, 1, 2, "Cell_12");
SetValue(objWorkSheet, 1, 3, "Cell_13");
parameters = new object[8];
parameters[0] = Missing;
parameters[1] = Missing;
parameters[2] = 1;
parameters[3] = Missing;
parameters[4] = Missing;
parameters[5] = Missing;
parameters[6] = true;
parameters[7] = Missing;
objWorkSheet.GetType().InvokeMember("PrintOut", System.Reflection.BindingFlags.InvokeMethod, null, objWorkSheet, parameters);
}
catch(Exception ex)
{
throw ex;
}
finally
{
ReleaseComObj(objWorkSheet);
if (objWorkbook != null)
{
objWorkbook.GetType().InvokeMember("Close", System.Reflection.BindingFlags.InvokeMethod, null, objWorkbook, null);
ReleaseComObj(objWorkbook);
}
if (objWorkbooks != null)
{
objWorkbooks.GetType().InvokeMember("Close", System.Reflection.BindingFlags.InvokeMethod, null, objWorkbooks, null);
ReleaseComObj(objWorkbooks);
}
if (objExcel != null)
{
objExcel.GetType().InvokeMember("Quit", System.Reflection.BindingFlags.InvokeMethod, null, objExcel, null);
ReleaseComObj(objExcel);
}
System.GC.Collect();
}
}
public void SetValue(object sheet, int row, int col, object value)
{
object[] parms = null;
parms = new object[2];
parms[0] = row;
parms[1] = col;
object cell = sheet.GetType().InvokeMember("Cells", System.Reflection.BindingFlags.GetProperty, null,sheet, parms);
parms = new object[1];
parms[0] = value;
cell.GetType().InvokeMember("Value", System.Reflection.BindingFlags.SetProperty, null, cell, parms);
ReleaseComObj(cell);
}
public void ReleaseComObj(object objCom)
{
if (objCom != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(objCom);
objCom = null;
}
}
}
}
调用代码：
ExcelPrint excelPrint = new ExcelPrint();
excelPrint.PrintOut("C:\\Book1.xls");
ExcelPrintNomal excelPrintNomal = new ExcelPrintNomal();
excelPrintNomal.PrintOut("C:\\Book1.xls");