zoukankan html css js c++ java

数据访问----实例4

方法1：

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 using System.Threading.Tasks;
  6 using System.Data;
  7 using System.Data.SqlClient;
  8 
  9 namespace vv
 10 {
 11     class Program
 12     {
 13         static void Main(string[] args)
 14         {
 15             bool t=true;
 16             do{
 17             Console.Write("赈灾物资发放登记系统
1：物质库存维护
2：物质库存列表
3：物质发放
4：物质发放统计
5：退出系统
");
 18             string tr = Console.ReadLine();
 19             switch (tr)
 20             {
 21                 case "1":
 22                     kcinsert.insert();
 23                     break;
 24                 case "2":
 25                     kccha.cha();
 26                     break;
 27                 case "3":
 28                     fainsert.insert();
 29                     break;
 30                 case "4":
 31                     facha.cha();
 32                     break;
 33                 case "5":
 34                     t=false;
 35                     break;
 36 
 37                 default:
 38                     break;
 39             }
 40             }while(t);
 41         }
 42         class kcinsert
 43         {
 44             public const string CONSTR = "server=.;database=yy;uid=sa;pwd=111111";
 45             public static void addkc(string name,string unit,string num,string price)
 46             {
 47                 SqlConnection scon = new SqlConnection(CONSTR);
 48                 try
 49                 {
 50                     scon.Open();
 51                     SqlCommand scmd = scon.CreateCommand();
 52                     scmd.CommandText = "insert into kc values('" + name + "','" + num + "','" + unit + "','" + price + "')";
 53                     scmd.ExecuteNonQuery();
 54                     Console.WriteLine("添加成功！");
 55 
 56                 }
 57                 finally
 58                 {
 59                     scon.Close();
 60                 }
 61                 
 62 
 63             }
 64             public static void insert()
 65             {
 66                 string name, unit, num, price;
 67                 Console.WriteLine("****************************物质库存维护****************************");
 68 
 69                 Console.Write("请输入物资名称：");
 70                 name = Console.ReadLine();
 71                 if(hasName(name))
 72                 {
 73                 Console.Write("请输入计量单位：");
 74                 unit = Console.ReadLine();
 75                 Console.Write("请输入库存数量：");
 76                 num = Console.ReadLine();
 77                 Console.Write("请输入物资单价：");
 78                 price = Console.ReadLine();
 79                 addkc(name,unit,num,price);
 80                 }
 81                
 82 
 83 
 84 
 85             }
 86             public static bool hasName(string name)
 87             {
 88                 bool t = true;
 89                 SqlConnection scon = new SqlConnection(CONSTR);
 90                 try
 91                 {
 92                     scon.Open();
 93                     SqlCommand scmd = scon.CreateCommand();
 94                     scmd.CommandText = "select * from kc where WzName='" + name + "'";
 95                     SqlDataReader re = scmd.ExecuteReader();
 96                     if (re.HasRows)
 97                     {
 98                         Console.Write("已有货物数据，请输入增加数量:");
 99                         string num = Console.ReadLine();
100                        
101                             updatekc(name, num);
102                             t = false;
103                     }
104                     return t;
105                 }
106                 finally
107                 {
108                     scon.Close();
109                 }
110 
111                 
112 
113             }
114             public static void updatekc(string name, string num)
115             {
116                 SqlConnection scon = new SqlConnection(CONSTR);
117                 try
118                 {
119                 scon.Open();
120                 SqlCommand scmd = scon.CreateCommand();
121                 scmd.CommandText = "update kc set Num=Num+'"+ num + "' where WzName='" + name + "'";
122                 scmd.ExecuteNonQuery();
123                 Console.WriteLine("添加成功！");
124 
125                 }
126                 finally
127                 {
128                 scon.Close();
129 
130                 }
131 
132             }
133 
134         }
135         class kccha
136         {
137             public const string CONSTR = "server=.;database=yy;uid=sa;pwd=111111";
138             public static void cha()
139             {
140                 SqlConnection scon = new SqlConnection(CONSTR);
141                 try
142                 {
143                 scon.Open();
144                 SqlCommand scmd = scon.CreateCommand();
145                 scmd.CommandText = "select * from kc";
146                 SqlDataReader re=scmd.ExecuteReader();
147                 Console.WriteLine("物质库存列表如下
****************************************************");
148                 Console.WriteLine("物资名称	库存数量	单价（元）
");
149                 while (re.Read())
150                 {
151                     Console.WriteLine(re[0].ToString()+"		"+re[1].ToString()+re[2].ToString()+"		"+re[3].ToString()+"
");
152                 }
153                 Console.WriteLine("****************************************************");
154 
155 
156                 }
157                 finally
158                 {
159                 scon.Close();
160 
161                 }
162 
163             }
164 
165         }
166         class fainsert
167         {
168             public const string CONSTR = "server=.;database=yy;uid=sa;pwd=111111";
169             public static void addkc(string name, string unit, string num, string price)
170             {
171                 SqlConnection scon = new SqlConnection(CONSTR);
172                 try
173                 {
174                 scon.Open();
175                 SqlCommand scmd = scon.CreateCommand();
176                 scmd.CommandText = "insert into kc values('" + name + "','" + num + "','" + unit + "','" + price + "')";
177                 scmd.ExecuteNonQuery();
178                 Console.WriteLine("添加成功！");
179 
180                 }
181                 finally
182                 {
183                 scon.Close();
184 
185                 }
186 
187             }
188             public static void insert()
189             {
190                 string name,num, receiver;
191                 Console.WriteLine("物资发放
****************************物质库存维护****************************");
192                 do{
193                 Console.Write("请输入发放物资名称：");
194                 name = Console.ReadLine();
195                 }while(!hasWuzi(name));
196                 do{
197                 Console.Write("请输入发放数量：");
198                 num = Console.ReadLine();
199                 }while(!has(num,name));
200                 Console.Write("接收人：");
201                 receiver = Console.ReadLine();
202                 addfa(name,num,receiver);
203                 Console.WriteLine("成功发放！");
204             }
205             public static void addfa(string name,string num,string receiver)
206             {
207                 SqlConnection scon = new SqlConnection(CONSTR);
208                 try
209                 {
210                 scon.Open();
211                 SqlCommand scmd = scon.CreateCommand();
212                 scmd.CommandText = "select * from kc where WzName='" + name + "'";
213                 SqlDataReader re = scmd.ExecuteReader();
214                 while (re.Read())
215                 {
216                    string price=re["Price"].ToString();
217                    string unit = re["Unit"].ToString();
218                    int n=Convert.ToInt32(num);
219                    insertfa(name,n,unit,price,receiver);
220                 }
221 
222                 }
223                 finally
224                 {
225                 scon.Close();
226 
227                 }
228             }
229             public static void insertfa(string name,int num,string unit,string price,string receiver)
230             {
231                 SqlConnection scon = new SqlConnection(CONSTR);
232                 try
233                 {
234                 scon.Open();
235                 SqlCommand scmd = scon.CreateCommand();
236                 scmd.CommandText = "insert into fafang values('"+name+"','"+num+"','"+unit+"','"+price+"','"+DateTime.Now+"','"+receiver+"')";
237                 scmd.ExecuteNonQuery();
238 
239                 }
240                 finally
241                 {
242                 scon.Close();
243 
244                 }
245 
246             }
247             public static bool has(string num,string name)
248             {
249                 bool t = false;
250                 int n = Convert.ToInt32(num);
251                 SqlConnection scon = new SqlConnection(CONSTR);
252 
253                 try
254                 {
255                     scon.Open();
256                     SqlCommand scmd = scon.CreateCommand();
257                     scmd.CommandText = "select * from kc where WzName='" + name + "'";
258                     SqlDataReader re = scmd.ExecuteReader();
259                     re.Read();
260                     int m = (int)re["Num"];
261                     if (m >= n)
262                     {
263                         t = true;
264                         updateKc(m, n, name);
265 
266 
267                     }
268                     else
269                     {
270                         Console.WriteLine("库存不足！！！");
271                     }
272                     return t;
273                 }
274                 finally
275                 {
276                     scon.Close();
277 
278                 }
279                 
280 
281 
282             }
283             public static void updateKc(int m,int num,string name)
284             {
285                 SqlConnection scon = new SqlConnection(CONSTR);
286                 try
287                 {
288                 scon.Open();
289                 SqlCommand scmd = scon.CreateCommand();
290                 scmd.CommandText = "update kc set Num='"+(m-num)+"' where WzName='"+name+"'";
291                 scmd.ExecuteNonQuery();
292                 Console.WriteLine("添加成功！");
293 
294                 }
295                 finally
296                 {
297                 scon.Close();
298 
299                 }
300 
301             }
302             public static bool hasWuzi(string name)
303             {
304                 bool t = false;
305             
306                 SqlConnection scon = new SqlConnection(CONSTR);
307                 try
308                 {
309                 scon.Open();
310                 SqlCommand scmd = scon.CreateCommand();
311                 scmd.CommandText = "select * from kc where WzName='"+name+"'";
312                 SqlDataReader re=scmd.ExecuteReader();
313                 t = re.HasRows;
314                 while (re.Read())
315                 {
316                     Console.WriteLine("当前单价："+re["Price"].ToString()+"元
当前库存："+re["Num"].ToString()+re["Unit"].ToString()+"
");
317                 }
318 
319                 }
320                 finally
321                 {
322                 scon.Close();
323 
324                 }
325 
326 
327 
328                 return t;
329             
330             }
331         }
332         class facha
333         {
334             public const string CONSTR = "server=.;database=yy;uid=sa;pwd=111111";
335             public static void cha()
336             {
337                 SqlConnection scon = new SqlConnection(CONSTR);
338                 try
339                 {
340                 scon.Open();
341                 SqlCommand scmd = scon.CreateCommand();
342                 scmd.CommandText = "select * from fafang";
343                 SqlDataReader re = scmd.ExecuteReader();
344                 Console.WriteLine("物资发放统计
****************************************************");
345                 Console.WriteLine("物资名称	发放数量	单价（元）	接收人
");
346                 while (re.Read())
347                 {
348                     Console.WriteLine(re[1].ToString() + "		" + re[2].ToString() + re[3].ToString() + "		" + re[4].ToString() + "		" + re[6].ToString() + "
");
349                 }
350                 Console.WriteLine("****************************************************");
351 
352                 }
353                 finally
354                 {
355                 scon.Close();
356 
357                 }
358 
359 
360             }
361 
362         }
363     }
364 }

View Code

方法2：

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 using System.Threading.Tasks;
  6 using System.Data;
  7 using System.Data.SqlClient;
  8 namespace ConsoleApplication1
  9 {
 10     class Program
 11     {
 12         const string CONNECTIONSTRING = "server=.;database=yy;uid=sa;pwd=111111";
 13         static SqlDataReader GetKcDataReader(string name)
 14         {
 15             SqlConnection conn = new SqlConnection(CONNECTIONSTRING);
 16            
 17             conn.Open();
 18             SqlCommand cmd = conn.CreateCommand();
 19             cmd.CommandText = "select * from kc where WzName='" + name + "'";
 20             SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
 21             return dr;
 22             
 23         }
 24         static decimal GetPrice(string name)
 25         {
 26             decimal price = 0;
 27             SqlDataReader dr = GetKcDataReader(name);
 28             dr.Read();
 29             price = Convert.ToDecimal(dr["price"]);
 30             dr.Close();
 31             return price;
 32         }
 33         static int GetNum(string name)
 34         {
 35             int num = 0;
 36             SqlDataReader dr = GetKcDataReader(name);
 37             dr.Read();
 38             num = Convert.ToInt32(dr["num"]);
 39             dr.Close();
 40             return num;
 41         }
 42         static string GetUnit(string name)
 43         {
 44             string unit = "";
 45             SqlDataReader dr = GetKcDataReader(name);
 46             dr.Read();
 47             unit = dr["unit"].ToString();
 48             dr.Close();
 49             return unit;
 50         }
 51         static void AddFaFang(string name, int num, string unit, decimal price, DateTime date, string receiver)
 52         {
 53             SqlConnection conn = new SqlConnection(CONNECTIONSTRING);
 54             try
 55             {
 56                 conn.Open();
 57                 SqlCommand cmd = conn.CreateCommand();
 58                 cmd.CommandText = "update kc set num = num-" + num + " where WzName='" + name + "' ";
 59                 cmd.ExecuteNonQuery();
 60                 cmd.CommandText = "insert into FaFang values('" + name + "','" + num + "','" + unit + "','" + price + "','" + date + "','" + receiver + "')";
 61                 cmd.ExecuteNonQuery();
 62             }
 63             finally
 64             {
 65                 conn.Close();
 66             }
 67         }
 68         static void FaFangTongJi()
 69         {
 70             Console.WriteLine("物资发放统计如下：");
 71             Console.WriteLine("**********************************************************");
 72             SqlConnection conn = new SqlConnection(CONNECTIONSTRING);
 73             try
 74             {
 75                 conn.Open();
 76                 SqlCommand cmd = conn.CreateCommand();
 77                 cmd.CommandText = "select * from fafang";
 78                 SqlDataReader dr = cmd.ExecuteReader();
 79                 Console.WriteLine("物资名称	发放数量	单价（元）	接收人
");
 80                 while (dr.Read())
 81                 {
 82                     Console.WriteLine(dr[1].ToString() + "		" + dr[2].ToString() + dr[3].ToString() + "		" + dr[4].ToString() + "		" + dr[6].ToString() + "
");
 83                 }
 84 
 85             }
 86             finally
 87             {
 88                 conn.Close();
 89 
 90             }
 91             Console.WriteLine("**********************************************************");
 92 
 93         }
 94         static void FaFang()
 95         {
 96             Console.WriteLine("物资发放");
 97             Console.Write("请输入发放物资：");
 98             string name = Console.ReadLine();
 99             if (hasName(name))
100             {
101                 Console.WriteLine("当前单价：" + GetPrice(name) + "元");
102                 Console.WriteLine("当前库存：" + GetNum(name) + GetUnit(name));
103                 Console.Write("请输入发放数量：");
104                 int num = Convert.ToInt32(Console.ReadLine());
105                 Console.Write("请输入接收人：");
106                 string receiver = Console.ReadLine();
107                 //向发放表插入数据
108                 AddFaFang(name, num, GetUnit(name), GetPrice(name), DateTime.Now, receiver);
109                 Console.WriteLine("物资发放成功");
110 
111             }
112             else
113             {
114                 Console.WriteLine("物资名称输入不正确！");
115                 Console.ReadKey();
116             }
117         }
118         public static bool hasName(string name)
119         {
120             bool t = false;
121             SqlDataReader dr = GetKcDataReader(name);
122             t = dr.HasRows;
123             dr.Close();
124             return t;
125 
126         }
127         static void ShowKC()
128         {
129             Console.WriteLine("物资库存列表如下：");
130             Console.WriteLine("**********************************************************");
131             Console.WriteLine("物资名称	库存数量	单价(元)");
132             SqlConnection conn = new SqlConnection(CONNECTIONSTRING);
133             try
134             {
135                 conn.Open();
136                 SqlCommand cmd = conn.CreateCommand();
137                 cmd.CommandText = "select * from kc";
138                 SqlDataReader dr = cmd.ExecuteReader();
139                 while (dr.Read())
140                 {
141                     Console.WriteLine(dr["WzName"].ToString() + "		" + dr["Num"].ToString() + dr["Unit"].ToString() + "		" + dr["Price"].ToString());
142                 }
143             }
144             finally
145             {
146                 conn.Close();
147             }
148             Console.WriteLine("**********************************************************");
149         }
150         static void Add()
151         {
152             Console.WriteLine("物资库存维护");
153             Console.Write("请输入物资名称：");
154             string name = Console.ReadLine();
155             Console.Write("请输入计量单位：");
156             string unit = Console.ReadLine();
157             Console.Write("请输入库存数量：");
158             int num = Convert.ToInt32 (Console.ReadLine());
159             Console.Write("请输入物资单价：");
160             decimal price = Convert.ToDecimal(Console.ReadLine());
161 
162             //向数据库中插入
163             SqlConnection conn = new SqlConnection(CONNECTIONSTRING);
164             try
165             {
166                 conn.Open();
167                 SqlCommand cmd = conn.CreateCommand();
168                 cmd.CommandText = "insert into KC values('" + name + "','" + num + "','" + unit + "','" + price + "')";
169                 cmd.ExecuteNonQuery();
170                 Console.WriteLine("添加成功");
171             }
172             catch
173             {
174                 Console.WriteLine("添加出错");
175             }
176             finally
177             {
178                 conn.Close();
179             }
180             
181         }
182         static void Main(string[] args)
183         {
184             while (true)
185             {
186                 Console.Clear();
187                 Console.WriteLine("赈灾物资发放统计系统");
188                 Console.WriteLine("1.物资库存维护");
189                 Console.WriteLine("2.物资库存列表");
190                 Console.WriteLine("3.物资发放");
191                 Console.WriteLine("4.物资发放统计");
192                 Console.WriteLine("5.退出");
193                 string menu = Console.ReadLine();
194                 if (menu == "5")
195                 {
196                     break;
197                 }
198                 else if (menu == "1")
199                 {
200                     Add();
201                 }
202                 else if (menu == "2")
203                 {
204                     ShowKC();
205                     Console.ReadKey();
206                 }
207                 else if (menu == "3")
208                 {
209                     FaFang();
210                 }
211                 else if (menu == "4")
212                 {
213                     FaFangTongJi();
214                     Console.ReadKey();
215                 }
216                 
217             }
218         }
219     }
220 }

View Code

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原文地址：https://www.cnblogs.com/lovesy2413/p/4487491.html