如何將datagridview數據導出爲ex​​cel？

Question

我的出口代碼

此代碼在excel中寫入數據，但內容適合單元格。他們分散。

public static void export_to_excel(DataGridView dgv, string excel_file) 
    { 
     int cols; 
     //open file 
     StreamWriter wr = new StreamWriter(excel_file); 
     cols = dgv.Columns.Count; 
     for (int i = 0; i < cols; i++) 
     { 
      wr.Write(dgv.Columns[i].HeaderText.ToString().ToUpper() + "\t"); 
     } 
     wr.WriteLine(); //write rows to excel file 

     for (int i = 0; i < (dgv.Rows.Count - 1); i++) 
     { 
      for (int j = 0; j < cols; j++) 
      { 
       if (dgv.Rows[i].Cells[j].Value != null) 
        wr.Write(dgv.Rows[i].Cells[j].Value + "\t"); 
       else 
       { 
        wr.Write("\t"); 
       } 
      } 
      wr.WriteLine(); 
     } 
     //close file 
     wr.Close(); } 

Answer 1

我已經做了，在VB.net，我將其轉換爲C＃與http://www.developerfusion.com/tools/convert/vb-to-csharp/，所以你應該對它進行測試。

VB.net代碼：

Imports System.Runtime.CompilerServices 
Imports Excel = Microsoft.Office.Interop.Excel 
Public Module ExcelMod 

    <Extension()> _ 
    Public Function ToExcel(ByVal grd As DataGridView, ByVal path As String, Optional ByRef exp As Exception = Nothing) As Boolean 
     Dim res As Boolean = False 
     exp = Nothing 
     Dim xlApp As Excel.Application = Nothing 
     Dim xlWorkBook As Excel.Workbook = Nothing 
     Dim xlWorkSheet As Excel.Worksheet = Nothing 
     Try 

      Dim oldCI As System.Globalization.CultureInfo = System.Threading.Thread.CurrentThread.CurrentCulture 

      Dim misValue As Object = System.Reflection.Missing.Value 
      Dim i As Integer 
      Dim j As Integer 

      xlApp = New Excel.ApplicationClass 
      System.Threading.Thread.CurrentThread.CurrentCulture = New System.Globalization.CultureInfo("en-US") 

      xlWorkBook = xlApp.Workbooks.Add(misValue) 
      xlWorkSheet = xlWorkBook.Sheets("sheet1") 

      Dim lastCol As Integer = 0 
      Dim lastRow As Integer = 0 
      For j = 0 To grd.ColumnCount - 1 
       If grd.Columns(j).Visible Then 
        xlWorkSheet.Columns(lastCol + 1).ColumnWidth = CInt(grd.Columns(j).Width/10) 
        xlWorkSheet.Cells(1, lastCol + 1) = grd.Columns(j).HeaderText 
        lastCol += 1 
       End If 
      Next 

      lastRow = 0 
      For i = 0 To grd.RowCount - 1 
       lastCol = 0 
       For j = 0 To grd.ColumnCount - 1 
        If grd.Columns(j).Visible AndAlso grd.Rows(i).Visible Then 

         If grd(j, i).FormattedValue <> Nothing Then _ 
          xlWorkSheet.Cells(lastRow + 2, lastCol + 1) = grd(j, i).FormattedValue.ToString() 

         lastCol += 1 

        End If 
       Next 
       If grd.Rows(i).Visible Then lastRow += 1 
      Next 


      xlWorkSheet.SaveAs(path) 
      xlWorkBook.Close() 
      xlApp.Quit() 

      System.Threading.Thread.CurrentThread.CurrentCulture = oldCI 
      res = True 

     Catch ex As Exception 
      exp = ex 
     Finally 
      If xlApp IsNot Nothing Then releaseObject(xlApp) 
      If xlWorkBook IsNot Nothing Then releaseObject(xlWorkBook) 
      If xlWorkSheet IsNot Nothing Then releaseObject(xlWorkSheet) 
     End Try 

     Return res 
    End Function 

    Private Sub releaseObject(ByVal obj As Object) 
     Try 
      System.Runtime.InteropServices.Marshal.ReleaseComObject(obj) 
      obj = Nothing 
     Catch ex As Exception 
      obj = Nothing 
     Finally 
      GC.Collect() 
     End Try 
    End Sub 

End Module 

C＃代碼：

using Microsoft.VisualBasic; 
using System; 
using System.Collections; 
using System.Collections.Generic; 
using System.Data; 
using System.Diagnostics; 
using System.Runtime.CompilerServices; 
using Excel = Microsoft.Office.Interop.Excel; 
public static class ExcelMod 
{ 


    public static bool ToExcel(this DataGridView grd, string path, ref Exception exp = null) 
    { 
     bool res = false; 
     exp = null; 
     Excel.Application xlApp = null; 
     Excel.Workbook xlWorkBook = null; 
     Excel.Worksheet xlWorkSheet = null; 

     try { 
      System.Globalization.CultureInfo oldCI = System.Threading.Thread.CurrentThread.CurrentCulture; 

      object misValue = System.Reflection.Missing.Value; 
      int i = 0; 
      int j = 0; 

      xlApp = new Excel.ApplicationClass(); 
      System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US"); 

      xlWorkBook = xlApp.Workbooks.Add(misValue); 
      xlWorkSheet = xlWorkBook.Sheets("sheet1"); 

      int lastCol = 0; 
      int lastRow = 0; 
      for (j = 0; j <= grd.ColumnCount - 1; j++) { 
       if (grd.Columns(j).Visible) { 
        xlWorkSheet.Columns(lastCol + 1).ColumnWidth = Convert.ToInt32(grd.Columns(j).Width/10); 
        xlWorkSheet.Cells(1, lastCol + 1) = grd.Columns(j).HeaderText; 
        lastCol += 1; 
       } 
      } 

      lastRow = 0; 
      for (i = 0; i <= grd.RowCount - 1; i++) { 
       lastCol = 0; 
       for (j = 0; j <= grd.ColumnCount - 1; j++) { 

        if (grd.Columns(j).Visible && grd.Rows(i).Visible) { 
         if (grd(j, i).FormattedValue != null) 
          xlWorkSheet.Cells(lastRow + 2, lastCol + 1) = grd(j, i).FormattedValue.ToString(); 

         lastCol += 1; 

        } 
       } 
       if (grd.Rows(i).Visible) 
        lastRow += 1; 
      } 


      xlWorkSheet.SaveAs(path); 
      xlWorkBook.Close(); 
      xlApp.Quit(); 

      System.Threading.Thread.CurrentThread.CurrentCulture = oldCI; 
      res = true; 

     } catch (Exception ex) { 
      exp = ex; 
     } finally { 
      if (xlApp != null) 
       releaseObject(xlApp); 
      if (xlWorkBook != null) 
       releaseObject(xlWorkBook); 
      if (xlWorkSheet != null) 
       releaseObject(xlWorkSheet); 
     } 

     return res; 
    } 

    private static void releaseObject(object obj) 
    { 
     try { 
      System.Runtime.InteropServices.Marshal.ReleaseComObject(obj); 
      obj = null; 
     } catch (Exception ex) { 
      obj = null; 
     } finally { 
      GC.Collect(); 
     } 
    } 

} 

Answer 2

大公的原因是分散是您正在使用一個標籤（\ t）的分離器，使用 「」 分離器。 僅用於導出值，您應該將文件導出爲csv文件。優點： - 它不需要安裝Excel。 - 無需COM互操作調用。 （順便說一下，它使得你的代碼是單線程的，並且不可擴展用於多CPU /線程） - Excel可以直接讀取csv文件。

出口代碼：

public static void export_to_excelAsCsvFile(DataGridView dGV, string filename) 
    { 
     string separator = ","; 
     StringBuilder stOutput = new StringBuilder(); 
     // Export titles: 
     StringBuilder sHeaders = new StringBuilder(); 
     for (int j = 0; j < dGV.Columns.Count; j++) 
     { 
      sHeaders.Append(dGV.Columns[j].HeaderText); 
      sHeaders.Append(separator); 
     } 
     stOutput.AppendLine(sHeaders.ToString()); 
     // Export data. 
     for (int i = 0; i < dGV.RowCount - 1; i++) 
     { 
      StringBuilder stLine = new StringBuilder(); 
      for (int j = 0; j < dGV.ColumnCount; j++) 
      { 
       stLine.Append(Convert.ToString(dGV[j, i].Value)); 
       stLine.Append(separator); 
      } 
      stOutput.AppendLine(stLine.ToString()); 
     } 

     File.WriteAllText(filename, stOutput.ToString()); 
    }