异常详细信息: System.Data.OleDb.OleDbException: 标准表达式中数据类型不匹配。 源错误: 行 52: OleDbCommand cmd = new OleDbCommand(sql, conn); 行 53: // return cmd.ExecuteScalar().ToString(); 行 54: int a = cmd.ExecuteNonQuery(); 行 55: return a.ToString(); 行 56: //OleDbDataReader dr = cmd.ExecuteReader(); sql = "select count(*) from Blog where BlogSortId='"+sqll +"'"; public static string TotalBlogSort(string sql) { OleDbConnection conn = new OleDbConnection();//创建连接对象 conn.ConnectionString = connstring;//给连接字符串赋值 conn.Open();//打开数据库 OleDbCommand cmd = new OleDbCommand(sql, conn); return cmd.ExecuteScalar ().ToString (); }