采用OleDB读取EXCEL文件 读取数字后,字符串无法读取
很多人采用OleDB读取EXCEL文件的时候会发现,当一列数据以数字开头的时候,后面的字符串无法读取,今天就给大家分享一下解决此问题的小窍门。
1、把列标题当做数据来读取(HDR=NO设置把第一行当做数据而不是表头来处理):
string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + fileName + ";" +
";Extended Properties=\"Excel 12.0;HDR=NO;IMEX=1\"";
2、对读取的数据进行处理:设置列名称、删掉第一行(列标题)
private static void convertData(DataTable dt)
{
foreach (DataColumn dc in dt.Columns)
{
//第一行其实应该是列名称,所以直接拿来设置
string colName = dt.Rows[0][dc.ColumnName].ToString();
if (!string.IsNullOrEmpty(colName))
{
dc.ColumnName = getDataColumnName(dt, colName);
}
}
//第一行任务完成,删除它
dt.Rows.RemoveAt(0);
}
完整代码:
using System; using System.Collections.Generic; using System.Data; using System.Data.OleDb; using System.Linq; using System.Text; namespace DepthDataConvert { internal class ExcelFileReader { public static DataTable GetExcelData(string fileName) { DataTable dt = new DataTable(); OleDbConnection conn = null; OleDbDataAdapter myCommand = null; try { string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + fileName + ";" + ";Extended Properties=\"Excel 12.0;HDR=NO;IMEX=1\""; conn = new OleDbConnection(strConn); conn.Open(); string strExcel = ""; DataSet ds = null; strExcel = "select * from [sheet1$]"; myCommand = new OleDbDataAdapter(strExcel, strConn); ds = new DataSet(); myCommand.Fill(ds, "table1"); dt = ds.Tables[0]; } catch (Exception e) { throw e; } finally { if (conn.State == ConnectionState.Open) { conn.Close(); myCommand.Dispose(); conn.Dispose(); } } convertData(dt); removeEmpty(dt); return dt; } private static void removeEmpty(DataTable dt) { List<DataRow> removelist = new List<DataRow>(); for (int i = 0; i < dt.Rows.Count; i++) { bool IsNull = true; for (int j = 0; j < dt.Columns.Count; j++) { if (!string.IsNullOrEmpty(dt.Rows[i][j].ToString().Trim())) { IsNull = false; } } if (IsNull) { removelist.Add(dt.Rows[i]); } } for (int i = 0; i < removelist.Count; i++) { dt.Rows.Remove(removelist[i]); } } private static void convertData(DataTable dt) { foreach (DataColumn dc in dt.Columns) { string colName = dt.Rows[0][dc.ColumnName].ToString(); if (!string.IsNullOrEmpty(colName)) { dc.ColumnName = getDataColumnName(dt, colName); } } dt.Rows.RemoveAt(0); } private static string getDataColumnName(DataTable dt, string cn) { string colName = cn; int index = 1; while (dt.Columns.Contains(colName)) { colName = cn + index++; } return colName; } public static void ExportExcel(DataTable dt) { if (dt == null || dt.Rows.Count == 0) return; Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); if (xlApp == null) { return; } System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture; System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US"); Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks; Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]; Microsoft.Office.Interop.Excel.Range range; long totalCount = dt.Rows.Count; long rowRead = 0; float percent = 0; for (int i = 0; i < dt.Columns.Count; i++) { worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName; range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]; range.Interior.ColorIndex = 15; range.Font.Bold = true; } for (int r = 0; r < dt.Rows.Count; r++) { for (int i = 0; i < dt.Columns.Count; i++) { worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i].ToString(); } rowRead++; percent = ((float)(100 * rowRead)) / totalCount; } xlApp.Visible = true; } } }