第一种是用数据流导出:
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#region SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.Filter = "Execl files (*.xls)|*.xls"; saveFileDialog.FilterIndex = 0; saveFileDialog.RestoreDirectory = true; saveFileDialog.CreatePrompt = true; saveFileDialog.Title = "Export Excel File"; saveFileDialog.ShowDialog(); if (saveFileDialog.FileName == "") return; Stream myStream; myStream = saveFileDialog.OpenFile(); StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0)); string str = ""; try { for (int i = 0; i < dataGridView1.ColumnCount; i++) { if (i > 0) { str += "\t"; } str += dataGridView1.Columns[i].HeaderText; } sw.WriteLine(str); for (int j = 0; j < dataGridView1.Rows.Count; j++) { string tempStr = ""; for (int k = 0; k < dataGridView1.Columns.Count; k++) { if (k > 0) { tempStr += "\t"; } tempStr += dataGridView1.Rows[j].Cells[k].Value.ToString(); } sw.WriteLine(tempStr); } sw.Close(); myStream.Close(); } catch (Exception ex) { //MessageBox.Show(ex.ToString()); } finally { sw.Close(); myStream.Close(); }#endregion |
这种方法的优点就是导出比较快，但是excel的表格里面设置标题，字体样式等都不能弄，因为你是用数据流直接导出为excel的，除非你能在数据流中设置这些样式，这个我还没这本事，哪位大哥会的教一下...嘿嘿
第二种方法是直接写一个类，这个类直接操作EXCEL的：
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using System;using System.Collections.Generic;using System.Windows.Forms;using System.Text;using System.Diagnostics;using System.IO;using Microsoft.Office.Interop.Excel; namespace Excel{ public class Export { /// <summary> /// DataGridView导出Excel /// </summary> /// <param name="strCaption">Excel文件中的标题</param> /// <param name="myDGV">DataGridView 控件</param> /// <returns>0:成功;1:DataGridView中无记录;2:Excel无法启动;9999:异常错误</returns> public int ExportExcel(string strCaption, DataGridView myDGV, SaveFileDialog saveFileDialog) { int result = 9999; //保存 saveFileDialog.Filter = "Execl files (*.xls)|*.xls"; saveFileDialog.FilterIndex = 0; saveFileDialog.RestoreDirectory = true; //saveFileDialog.CreatePrompt = true; saveFileDialog.Title = "Export Excel File"; if ( saveFileDialog.ShowDialog()== DialogResult.OK) { if (saveFileDialog.FileName == "") { MessageBox.Show("请输入保存文件名！"); saveFileDialog.ShowDialog(); } // 列索引，行索引，总列数，总行数 int ColIndex = 0; int RowIndex = 0; int ColCount = myDGV.ColumnCount; int RowCount = myDGV.RowCount; if (myDGV.RowCount == 0) { result = 1; } // 创建Excel对象 Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.ApplicationClass(); if (xlApp == null) { result = 2; } try { // 创建Excel工作薄 Microsoft.Office.Interop.Excel.Workbook xlBook = xlApp.Workbooks.Add(true); Microsoft.Office.Interop.Excel.Worksheet xlSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlBook.Worksheets[1]; // 设置标题 Microsoft.Office.Interop.Excel.Range range = xlSheet.get_Range(xlApp.Cells[1, 1], xlApp.Cells[1, ColCount]); //标题所占的单元格数与DataGridView中的列数相同 range.MergeCells = true; xlApp.ActiveCell.FormulaR1C1 = strCaption; xlApp.ActiveCell.Font.Size = 20; xlApp.ActiveCell.Font.Bold = true; xlApp.ActiveCell.HorizontalAlignment = Microsoft.Office.Interop.Excel.Constants.xlCenter; // 创建缓存数据 object[,] objData = new object[RowCount + 1, ColCount]; //获取列标题 foreach (DataGridViewColumn col in myDGV.Columns) { objData[RowIndex, ColIndex++] = col.HeaderText; } // 获取数据 for (RowIndex = 1; RowIndex < RowCount; RowIndex++) { for (ColIndex = 0; ColIndex < ColCount; ColIndex++) { if (myDGV[ColIndex, RowIndex - 1].ValueType == typeof(string) || myDGV[ColIndex, RowIndex - 1].ValueType == typeof(DateTime))//这里就是验证DataGridView单元格中的类型,如果是string或是DataTime类型,则在放入缓存时在该内容前加入" "; { objData[RowIndex, ColIndex] = "" + myDGV[ColIndex, RowIndex - 1].Value; } else { objData[RowIndex, ColIndex] = myDGV[ColIndex, RowIndex - 1].Value; } } System.Windows.Forms.Application.DoEvents(); } // 写入Excel range = xlSheet.get_Range(xlApp.Cells[2, 1], xlApp.Cells[RowCount, ColCount]); range.Value2 = objData; xlBook.Saved = true; xlBook.SaveCopyAs(saveFileDialog.FileName); } catch (Exception err) { result = 9999; } finally { xlApp.Quit(); GC.Collect(); //强制回收 } //返回值 result = 0; } return result; } }} |
这个优点是能设置样式什么的。缺点就是导出速度慢...
以上两种方法都是参考了很多料的..写在这里以便于相互学习..
补充一下：用第二种方法导出excel会有格式方面的变化，比如身份证号码按科学计算法导出了，不是按原先的模型
改进方法是在写入excel时添加一个格式声明：range.NumberFormatLocal = "@";
如：// 写入Excel
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range = xlSheet.get_Range(xlApp.Cells[2, 1], xlApp.Cells[RowCount + 2, ColCount]);range.NumberFormatLocal = "@";range.Value2 = objData; |
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原文链接：https://blog.csdn.net/u011981242/article/details/51083335
