c# 读取excel数据 改进版

Posted 2021-11-25

public static DataSet ToDataTable(string filePath, string filename, string tablename) { string connStr = ""; string fileType = System.IO.Path.GetExtension(filename); if (string.IsNullOrEmpty(fileType)) return null; if (fileType == ".xls") connStr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + filePath + ";" + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\""; else connStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + filePath + ";" + ";Extended Properties=\"Excel 12.0;HDR=YES;IMEX=1\""; string sql_F = "Select * FROM [{0}]"; OleDbConnection conn = null; OleDbDataAdapter da = null; DataTable dtSheetName = null; DataSet ds = new DataSet(); try { // 初始化连接，并打开 conn = new OleDbConnection(connStr); conn.Open(); // 获取数据源的表定义元数据 string SheetName = ""; dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" }); // 初始化适配器 da = new OleDbDataAdapter(); for (int i = 0; i < dtSheetName.Rows.Count; i++) { SheetName = (string)dtSheetName.Rows[i]["TABLE_NAME"]; if (SheetName.Contains("$") && !SheetName.Replace("‘", "").EndsWith("$") || SheetName.Contains(tablename)==false) { continue; } da.SelectCommand = new OleDbCommand(String.Format(sql_F, SheetName), conn); DataSet dsItem = new DataSet(); da.Fill(dsItem, tablename); ds.Tables.Add(dsItem.Tables[0].Copy()); } } catch (Exception ex) { // MessageBox.Show(ex.Message); // throw ex; } finally { // 关闭连接 if (conn.State == ConnectionState.Open) { conn.Close(); da.Dispose(); conn.Dispose(); } } return ds; }