winform 读取execl
winform 读取execl 用什么控件读取excel地址？谢谢
[解决办法]
OpenFileDialog
[解决办法]
- C# code
OpenFileDialog open = new OpenFileDialog(); open.Filter = "*.xls(*.xls)|*.xls|*.xlsx(*.xlsx)|*.xlsx"; if (open.ShowDialog() == DialogResult.OK) { string path = open.FileName; }
[解决办法]
- C# code
FileDialog fileDialog =new OpenFileDialog(); fileDialog.Title = "Open File"; //是否自动添加默认扩展名 fileDialog.AddExtension = true; fileDialog.Filter = "Excel文件(*.xls)|*.xls"; fileDialog.DefaultExt = "." + Filetype; fileDialog.FilterIndex = 1; fileDialog.RestoreDirectory = true; //默认路径为“”； string path = ""; if (fileDialog.ShowDialog() == DialogResult.OK) { //选择文件的路径 path = fileDialog.FileName; }
[解决办法]
改改就能用
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using System.Web;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.Record.Formula.Eval;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.POIFS;
using NPOI.SS.UserModel;
using NPOI.Util;
using NPOI.SS;
using NPOI.DDF;
using NPOI.SS.Util;
using System.Collections;
using System.Text.RegularExpressions;
namespace CommonFunction
{
public class ExcelHelper
{
//private static WriteLog wl = new WriteLog();
#region 从datatable中将数据导出到excel
/// <summary>
/// DataTable导出到Excel的MemoryStream
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
static MemoryStream ExportDT(DataTable dtSource, string strHeaderText)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.CreateSheet() as HSSFSheet;
#region 右击文件 属性信息
//{
// DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
// dsi.Company = "http://www.yongfa365.com/";
// workbook.DocumentSummaryInformation = dsi;
// SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
// si.Author = "柳永法"; //填加xls文件作者信息
// si.ApplicationName = "NPOI测试程序"; //填加xls文件创建程序信息
// si.LastAuthor = "柳永法2"; //填加xls文件最后保存者信息
// si.Comments = "说明信息"; //填加xls文件作者信息
// si.Title = "NPOI测试"; //填加xls文件标题信息
// si.Subject = "NPOI测试Demo"; //填加文件主题信息
// si.CreateDateTime = DateTime.Now;
// workbook.SummaryInformation = si;
//}
#endregion
HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
//取得列宽
int[] arrColWidth = new int[dtSource.Columns.Count];
foreach (DataColumn item in dtSource.Columns)
{
arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
}
for (int i = 0; i < dtSource.Rows.Count; i++)
{
for (int j = 0; j < dtSource.Columns.Count; j++)
{
int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
if (intTemp > arrColWidth[j])
{
arrColWidth[j] = intTemp;
}
}
}
int rowIndex = 0;
foreach (DataRow row in dtSource.Rows)
{
#region 新建表，填充表头，填充列头，样式
if (rowIndex == 65535 || rowIndex == 0)
{
if (rowIndex != 0)
{
sheet = workbook.CreateSheet() as HSSFSheet;
}
#region 表头及样式
{
HSSFRow headerRow = sheet.CreateRow(0) as HSSFRow;
headerRow.HeightInPoints = 25;
headerRow.CreateCell(0).SetCellValue(strHeaderText);
HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont() as HSSFFont;
font.FontHeightInPoints = 20;
font.Boldweight = 700;
headStyle.SetFont(font);
headerRow.GetCell(0).CellStyle = headStyle;
sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
//headerRow.Dispose();
}
#endregion
#region 列头及样式
{
HSSFRow headerRow = sheet.CreateRow(1) as HSSFRow;
HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont() as HSSFFont;
font.FontHeightInPoints = 10;
font.Boldweight = 700;
headStyle.SetFont(font);
foreach (DataColumn column in dtSource.Columns)
{
headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
headerRow.GetCell(column.Ordinal).CellStyle = headStyle;
//设置列宽
sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1)*256);
}
//headerRow.Dispose();
}
#endregion
rowIndex = 2;
}
#endregion
#region 填充内容
HSSFRow dataRow = sheet.CreateRow(rowIndex) as HSSFRow;
foreach (DataColumn column in dtSource.Columns)
{
HSSFCell newCell = dataRow.CreateCell(column.Ordinal) as HSSFCell;
string drValue = row[column].ToString();
switch (column.DataType.ToString())
{
case "System.String": //字符串类型
double result;
if(isNumeric(drValue,out result))
{
double.TryParse(drValue, out result);
newCell.SetCellValue(result);
break;
}
else
{
newCell.SetCellValue(drValue);
break;
}
case "System.DateTime": //日期类型
DateTime dateV;
DateTime.TryParse(drValue, out dateV);
newCell.SetCellValue(dateV);
newCell.CellStyle = dateStyle; //格式化显示
break;
case "System.Boolean": //布尔型
bool boolV = false;
bool.TryParse(drValue, out boolV);
newCell.SetCellValue(boolV);
break;
case "System.Int16": //整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV = 0;
int.TryParse(drValue, out intV);
newCell.SetCellValue(intV);
break;
case "System.Decimal": //浮点型
case "System.Double":
double doubV = 0;
double.TryParse(drValue, out doubV);
newCell.SetCellValue(doubV);
break;
case "System.DBNull": //空值处理
newCell.SetCellValue("");
break;
default:
newCell.SetCellValue("");
break;
}
}
#endregion
rowIndex++;
}
using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
sheet.Dispose();
workbook.Dispose();
return ms;
}
}
[解决办法]
switch (row.GetCell(j).CachedFormulaResultType)
{
case CellType.STRING:
string strFORMULA = row.GetCell(j).StringCellValue;
if (strFORMULA != null && strFORMULA.Length > 0)
{
dataRow[j] = strFORMULA.ToString();
}
else
{
dataRow[j] = null;
}
break;
case CellType.NUMERIC:
dataRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);
break;
case CellType.BOOLEAN:
dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
break;
case CellType.ERROR:
dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
break;
default:
dataRow[j] = "";
break;
}
break;
default:
dataRow[j] = "";
break;
}
}
}
catch (Exception exception)
{
//wl.WriteLogs(exception.ToString());
}
}
table.Rows.Add(dataRow);
}
catch (Exception exception)
{
//wl.WriteLogs(exception.ToString());
}
}
}
catch (Exception exception)
{
//wl.WriteLogs(exception.ToString());
}
return table;
}
#endregion
#region 更新excel中的数据
/// <summary>
/// 更新Excel表格
/// </summary>
/// <param name="outputFile">需更新的excel表格路径</param>
/// <param name="sheetname">sheet名</param>
/// <param name="updateData">需更新的数据</param>
/// <param name="coluid">需更新的列号</param>
/// <param name="rowid">需更新的开始行号</param>
public static void UpdateExcel(string outputFile, string sheetname, string[] updateData, int coluid, int rowid)
{
FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
for (int i = 0; i < updateData.Length; i++)
{
try
{
if(sheet1.GetRow(i+rowid) == null)
{
sheet1.CreateRow(i + rowid);
}
if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
{
sheet1.GetRow(i + rowid).CreateCell(coluid);
}
sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
}
catch (Exception ex)
{
// wl.WriteLogs(ex.ToString());
throw;
}
}
try
{
readfile.Close();
FileStream writefile = new FileStream(outputFile, FileMode.Create,FileAccess.Write);
hssfworkbook.Write(writefile);
writefile.Close();
}
catch (Exception ex)
{
// wl.WriteLogs(ex.ToString());
}
}