/// <summary>
/// 读取Excel文件到DataSet中
/// </summary>
/// <param name="filePath">文件路径</param>
/// <returns></returns>
public static DataSet ToDataTable(string filePath)
{string connStr = "";string fileType = System.IO.Path.GetExtension(filePath);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\"";elseconnStr = "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("$") && !SheetName.Replace("'", "").EndsWith("$")){continue;}da.SelectCommand = new OleDbCommand(String.Format(sql_F, SheetName), conn);DataSet dsItem = new DataSet();da.Fill(dsItem, SheetName);ds.Tables.Add(dsItem.Tables[0].Copy());}}finally{// 关闭连接if (conn.State == ConnectionState.Open){conn.Close();da.Dispose();conn.Dispose();}}return ds;
}
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原文链接：https://blog.csdn.net/u012235352/article/details/95589102