C# 调用打印机 打印 Excel

打印 Excel 模板

大体思路，通过NPOI操作Excel文件，通过Spire将Excel转成图片，将图片传给系统打印。

Spire是收费工具，在微软库中下载Free版本。

#region 打印所用到的函数

private void btnPrint_Click(object sender, EventArgs e)

{

if (!pnlRes.Visible) { MessageBox.Show("请先测量数据！", "提示"); return; }             //未测量无法打印

try

{

Settings.PrintDataRead();

if (File.Exists(Settings.path_printExcel))

{

File.Copy(Settings.path_printExcel, Settings.path_printExcelCopy, true);//三个参数分别是源文件路径，存储路径，若存储路径有相同文件是否替换

}

writeExcel();

prtDoc.PrinterSettings.PrinterName = Settings.PrintData.PrinterName;               //设置打印机名称

System.Drawing.Printing.PaperSize ps = new System.Drawing.Printing.PaperSize();

//ps.RawKind = 150;

ps.Height = Settings.PrintData.PaperSizeHeight - 5;

ps.Width = Settings.PrintData.PaperSizeWidth + 2;

//ps.PaperName = "default";

prtDoc.DefaultPageSettings.PaperSize = ps;

excelToImage(Settings.path_printExcelCopy);

prtDoc.Print();

cleanAll();

File.Delete(Settings.path_printExcelCopy);

}

catch (Exception ex)

{

LogHelper.Error(ex.GetType(), ex);

MessageBox.Show(ex.Message, "错误");

File.Delete(Settings.path_printExcelCopy);

}

}

//写入信息到Excel

private void writeExcel()

{

try

{

string tempPath = Settings.path_printExcelCopy;

//Excel对象

XSSFWorkbook wk = null;

using (FileStream fs = File.Open(tempPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))

{

wk = new XSSFWorkbook(fs);

fs.Close();

}

//Excel页面 设置->Sheet1

ISheet sheet = wk.GetSheet("Sheet1");

　　　　/* 写入操作 依据需求自己编写

for (int j = 0; j < chList.Length; ++j)

{

if ((string)chList[j].ckb.Tag != "0")

{

int cell = (j + 1) * 3 - 2;

//写入通道

sheet.GetRow(1).GetCell(cell).SetCellValue("CH" + (j + 1));

//写入OK / NG     Tag 1,OK 2NG

if ((string)chList[j].ckb.Tag == "1")

{

sheet.GetRow(1).GetCell(cell + 1).SetCellValue("OK");

}

else

{

sheet.GetRow(1).GetCell(cell + 1).SetCellValue("NG");

}

//写入机型 时间

sheet.GetRow(2).GetCell(cell).SetCellValue("机型:" + Settings.Model.deviceName);

sheet.GetRow(3).GetCell(cell).SetCellValue(DateTime.Now.ToString("yyyy-MM-dd HH:mm"));

for (int i = 0; i < chList[j].lblList.Length; ++i)

{

switch (i)

{

case 0:

sheet.GetRow(4).GetCell(cell).SetCellValue("流量:" + chList[j].lblList[i].Text);

break;

case 1:

sheet.GetRow(5).GetCell(cell).SetCellValue("出口压力:" + chList[j].lblList[i].Text);

break;

case 2:

sheet.GetRow(6).GetCell(cell).SetCellValue("浓度:" + chList[j].lblList[i].Text);

break;

case 3:

sheet.GetRow(7).GetCell(cell).SetCellValue("雾化压力:" + chList[j].lblList[i].Text);

break;

}

}

}

else

{

}

}

　　　　*/

using (var fs = new FileStream(tempPath, FileMode.Create, FileAccess.Write))

{

wk.Write(fs);

}

}

catch (Exception ex)

{

LogHelper.Error(ex.GetType(), ex);

MessageBox.Show(ex.Message, "错误");

}

}

private void excelToImage(string filename)

{

try

{

Workbook workbook = new Workbook();

workbook.LoadFromFile(filename);

Worksheet sheet = workbook.Worksheets[0];

sheet.SaveToImage(Settings.path_printImage); //图片后缀.bmp ,imagepath自己设置

}

catch (Exception ex)

{

LogHelper.Error(ex.GetType(), ex);

MessageBox.Show(ex.Message, "错误");

}

}

private void prtDoc_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)

{

#region 如果不需要截取图片，可以不用写以下代码

//截取左上角宽度

int rectangleWidth = Settings.PrintData.MarginWidth + 72;

int rectangleHight = Settings.PrintData.MarginHeight + 96;

try

{

GC.Collect();

Graphics g = e.Graphics;

//imagepath是指 excel转成的图片的路径

using (Bitmap bitmap = new Bitmap(Settings.path_printImage))

{

Rectangle newarea = new Rectangle();

newarea.X = rectangleWidth;

newarea.Y = rectangleHight;

newarea.Width = bitmap.Width - rectangleWidth;

newarea.Height = bitmap.Height - rectangleHight;

using (Bitmap newbitmap = bitmap.Clone(newarea, bitmap.PixelFormat))

{

//打印

g.DrawImage(newbitmap, 0, 0, newbitmap.Width, newbitmap.Height);

}

}

}

catch (Exception ex)

{

LogHelper.Error(ex.GetType(), ex);

MessageBox.Show(ex.Message, "错误");

}

#endregion

}

#endregion