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827 lines (754 loc) · 30.1 KB
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namespace APIJSON.Data;
using AspectCore.Extensions.Reflection;
using global::SqlSugar;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Linq;
using System.Text.RegularExpressions;
/// <summary>
///
/// </summary>
public class SelectTable
{
private readonly IIdentityService _identitySvc;
private readonly ITableMapper _tableMapper;
private readonly SqlSugarClient db;
/// <summary>
///
/// </summary>
/// <param name="identityService"></param>
/// <param name="tableMapper"></param>
/// <param name="dbClient"></param>
public SelectTable(IIdentityService identityService, ITableMapper tableMapper, SqlSugarClient dbClient)
{
_identitySvc = identityService;
_tableMapper = tableMapper;
db = dbClient;
}
/// <summary>
/// 判断表名是否正确
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public virtual bool IsTable(string table)
{
return db.DbMaintenance.GetTableInfoList().Any(it => it.Name.Equals(table, StringComparison.CurrentCultureIgnoreCase));
}
/// <summary>
/// 判断表的列名是否正确
/// </summary>
/// <param name="table"></param>
/// <param name="col"></param>
/// <returns></returns>
public virtual bool IsCol(string table, string col)
{
return db.DbMaintenance.GetColumnInfosByTableName(table).Any(it => it.DbColumnName.Equals(col, StringComparison.CurrentCultureIgnoreCase));
}
/// <summary>
///
/// </summary>
/// <param name="subtable"></param>
/// <param name="page"></param>
/// <param name="count"></param>
/// <param name="json"></param>
/// <param name="dd"></param>
/// <returns></returns>
public virtual Tuple<dynamic, int> GetTableData(string subtable, int page, int count, int query, string json, JObject dd)
{
var role = _identitySvc.GetSelectRole(subtable);
if (!role.Item1)//没有权限返回异常
{
throw new Exception(role.Item2);
}
string selectrole = role.Item2;
subtable = _tableMapper.GetTableName(subtable);
JObject values = JObject.Parse(json);
page = values["page"] == null ? page : int.Parse(values["page"].ToString());
count = values["count"] == null ? count : int.Parse(values["count"].ToString());
query = values["query"] == null ? query : int.Parse(values["query"].ToString());
values.Remove("page");
values.Remove("count");
var tb = sugarQueryable(subtable, selectrole, values, dd);
if (query == 1)//1-总数
return new Tuple<dynamic, int>(new List<object>(), tb.Count());
else
{
if (count > 0)
{
int total = 0;
if (query == 0)//0-对象
return new Tuple<dynamic, int>(tb.ToPageList(page, count), total);
else
//2-以上全部
return new Tuple<dynamic, int>(tb.ToPageList(page, count, ref total), total);
}
else
{
if (query == 0)
return new Tuple<dynamic, int>(tb.ToList(), 0);
else
return new Tuple<dynamic, int>(tb.ToList(), tb.Count());
}
}
}
/// <summary>
/// 解析并查询
/// </summary>
/// <param name="query"></param>
/// <returns></returns>
public virtual JObject Query(string queryJson)
{
JObject resultObj = new JObject();
JObject queryJobj = JObject.Parse(queryJson);
resultObj = Query(queryJobj);
return resultObj;
}
/// <summary>
/// 单表查询
/// </summary>
/// <param name="queryObj"></param>
/// <param name="nodeName">返回数据的节点名称 默认为 infos</param>
/// <returns></returns>
public virtual JObject QuerySingle(JObject queryObj, string nodeName = "infos")
{
JObject resultObj = new JObject();
resultObj.Add("code", "200");
resultObj.Add("msg", "success");
int total = 0;
foreach (var item in queryObj)
{
string key = item.Key.Trim();
if (key.EndsWith("[]"))
{
total = QuerySingleList(resultObj, item, nodeName);
}
else if (key.Equals("func"))
{
ExecFunc(resultObj, item);
}
else if (key.Equals("total@"))
{
resultObj.Add("total", total);
}
}
return resultObj;
}
/// <summary>
/// 获取查询语句
/// </summary>
/// <param name="queryObj"></param>
/// <returns></returns>
public virtual string ToSql(JObject queryObj)
{
foreach (var item in queryObj)
{
string key = item.Key.Trim();
if (key.EndsWith("[]"))
{
return ToSql(item);
}
}
return string.Empty;
}
/// <summary>
/// 解析并查询
/// </summary>
/// <param name="query"></param>
/// <returns></returns>
public virtual JObject Query(JObject queryObj)
{
JObject resultObj = new JObject();
resultObj.Add("code", "200");
resultObj.Add("msg", "success");
int total = 0;
foreach (var item in queryObj)
{
string key = item.Key.Trim();
if (key.Equals("[]"))
{
total = QueryMoreList(resultObj, item);
}
else if (key.EndsWith("[]"))
{
total = QuerySingleList(resultObj, item);
}
else if (key.Equals("func"))
{
ExecFunc(resultObj, item);
}
else if (key.Equals("total@"))
{
resultObj.Add("total", total);
}
else
{
var template = GetFirstData(key, item.Value.ToString(), resultObj);
if (template != null)
{
resultObj.Add(key, JToken.FromObject(template));
}
}
}
return resultObj;
}
//动态调用方法
private object ExecFunc(string funcname, object[] param, Type[] types)
{
var method = typeof(FuncList).GetMethod(funcname);
var reflector = method.GetReflector();
var result = reflector.Invoke(new FuncList(), param);
return result;
}
//生成sql
private string ToSql(string subtable, int page, int count, int query, string json)
{
JObject values = JObject.Parse(json);
page = values["page"] == null ? page : int.Parse(values["page"].ToString());
count = values["count"] == null ? count : int.Parse(values["count"].ToString());
query = values["query"] == null ? query : int.Parse(values["query"].ToString());
values.Remove("page");
values.Remove("count");
subtable = _tableMapper.GetTableName(subtable);
var tb = sugarQueryable(subtable, "*", values, null);
var sqlObj = tb.Skip((page - 1) * count).Take(10).ToSql();
return sqlObj.Key;
}
//
private dynamic GetFirstData(string subtable, string json, JObject job)
{
var role = _identitySvc.GetSelectRole(subtable);
if (!role.Item1)//没有权限返回异常
{
throw new Exception(role.Item2);
}
string selectrole = role.Item2;
subtable = _tableMapper.GetTableName(subtable);
JObject values = JObject.Parse(json);
values.Remove("page");
values.Remove("count");
var tb = sugarQueryable(subtable, selectrole, values, job).First();
var dic = (IDictionary<string, object>)tb;
foreach (var item in values.Properties().Where(it => it.Name.EndsWith("()")))
{
if (item.Value.IsValue())
{
string func = item.Value.ToString().Substring(0, item.Value.ToString().IndexOf("("));
string param = item.Value.ToString().Substring(item.Value.ToString().IndexOf("(") + 1).TrimEnd(')');
var types = new List<Type>();
var paramss = new List<object>();
foreach (var va in param.Split(','))
{
types.Add(typeof(object));
paramss.Add(tb.Where(it => it.Key.Equals(va)).Select(i => i.Value));
}
dic[item.Name] = ExecFunc(func, paramss.ToArray(), types.ToArray());
}
}
return tb;
}
//单表查询,返回的数据在指定的NodeName节点
private int QuerySingleList(JObject resultObj, KeyValuePair<string, JToken> item, string nodeName)
{
string key = item.Key.Trim();
var jb = JObject.Parse(item.Value.ToString());
int page = jb["page"] == null ? 0 : int.Parse(jb["page"].ToString());
int count = jb["count"] == null ? 10 : int.Parse(jb["count"].ToString());
int query = jb["query"] == null ? 0 : int.Parse(jb["query"].ToString());
int total = 0;
jb.Remove("page"); jb.Remove("count"); jb.Remove("query");
var htt = new JArray();
foreach (var t in jb)
{
var datas = GetTableData(t.Key, page, count, query, t.Value.ToString(), null);
if (query > 0)
{
total = datas.Item2;
}
foreach (var data in datas.Item1)
{
htt.Add(JToken.FromObject(data));
}
}
if (!string.IsNullOrEmpty(nodeName))
{
resultObj.Add(nodeName, htt);
}
else
resultObj.Add(key, htt);
return total;
}
//生成sql
private string ToSql(KeyValuePair<string, JToken> item)
{
string key = item.Key.Trim();
var jb = JObject.Parse(item.Value.ToString());
int page = jb["page"] == null ? 0 : int.Parse(jb["page"].ToString());
int count = jb["count"] == null ? 10 : int.Parse(jb["count"].ToString());
int query = jb["query"] == null ? 0 : int.Parse(jb["query"].ToString());
jb.Remove("page"); jb.Remove("count"); jb.Remove("query");
var htt = new JArray();
foreach (var t in jb)
{
return ToSql(t.Key, page, count, query, t.Value.ToString());
}
return string.Empty;
}
//单表查询
private int QuerySingleList(JObject resultObj, KeyValuePair<string, JToken> item)
{
string key = item.Key.Trim();
return QuerySingleList(resultObj, item, key);
}
//多列表查询
private int QueryMoreList(JObject resultObj, KeyValuePair<string, JToken> item)
{
int total = 0;
var jb = JObject.Parse(item.Value.ToString());
var page = jb["page"] == null ? 0 : int.Parse(jb["page"].ToString());
var count = jb["count"] == null ? 10 : int.Parse(jb["count"].ToString());
var query = jb["query"] == null ? 0 : int.Parse(jb["query"].ToString());
jb.Remove("page"); jb.Remove("count"); jb.Remove("query");
var htt = new JArray();
List<string> tables = new List<string>(), where = new List<string>();
foreach (var t in jb)
{
tables.Add(t.Key); where.Add(t.Value.ToString());
}
if (tables.Count > 0)
{
string table = tables[0];
var temp = GetTableData(table, page, count, query, where[0], null);
if (query > 0)
{
total = temp.Item2;
}
foreach (var dd in temp.Item1)
{
var zht = new JObject();
zht.Add(table, JToken.FromObject(dd));
for (int i = 1; i < tables.Count; i++)
{
string subtable = tables[i];
if (subtable.EndsWith("[]"))
{
subtable = subtable.TrimEnd("[]".ToCharArray());
var jbb = JObject.Parse(where[i]);
page = jbb["page"] == null ? 0 : int.Parse(jbb["page"].ToString());
count = jbb["count"] == null ? 0 : int.Parse(jbb["count"].ToString());
var lt = new JArray();
foreach (var d in GetTableData(subtable, page, count, query, jbb[subtable].ToString(), zht).Item1)
{
lt.Add(JToken.FromObject(d));
}
zht.Add(tables[i], lt);
}
else
{
var ddf = GetFirstData(subtable, where[i].ToString(), zht);
if (ddf != null)
{
zht.Add(subtable, JToken.FromObject(ddf));
}
}
}
htt.Add(zht);
}
}
if (query != 1)
{
resultObj.Add("[]", htt);
}
return total;
}
//执行方法
private void ExecFunc(JObject resultObj, KeyValuePair<string, JToken> item)
{
JObject jb = JObject.Parse(item.Value.ToString());
Type type = typeof(FuncList);
var dataJObj = new JObject();
foreach (var f in jb)
{
var types = new List<Type>();
var param = new List<object>();
foreach (var va in JArray.Parse(f.Value.ToString()))
{
types.Add(typeof(object));
param.Add(va);
}
dataJObj.Add(f.Key, JToken.FromObject(ExecFunc(f.Key, param.ToArray(), types.ToArray())));
}
resultObj.Add("func", dataJObj);
}
//
private ISugarQueryable<ExpandoObject> sugarQueryable(string subtable, string selectrole, JObject values, JObject dd)
{
if (!IsTable(subtable))
{
throw new Exception($"表名{subtable}不正确！");
}
var tb = db.Queryable(subtable, "tb");
if (values["@column"].IsValue())
{
ProcessColumn(subtable, selectrole, values, tb);
}
else
{
tb.Select(selectrole);
}
List<IConditionalModel> conModels = new List<IConditionalModel>();
if (values["identity"].IsValue())
{
conModels.Add(new ConditionalModel() { FieldName = values["identity"].ToString(), ConditionalType = ConditionalType.Equal, FieldValue = _identitySvc.GetUserIdentity() });
}
foreach (var va in values)
{
string vakey = va.Key.Trim();
string fieldValue = va.Value.ToString();
if (vakey.StartsWith("@"))
{
continue;
}
if (vakey.EndsWith("$"))//模糊查询
{
FuzzyQuery(subtable, conModels, va);
}
else if (vakey.EndsWith("{}"))//逻辑运算
{
ConditionQuery(subtable, conModels, va);
}
else if (vakey.EndsWith("%"))//bwtween查询
{
ConditionBetween(subtable, conModels, va);
}
else if (vakey.EndsWith("@") && dd != null) // 关联上一个table
{
string[] str = fieldValue.Split('/');
string value = string.Empty;
if (str.Length == 3)
{
value = dd[str[1]][str[2]].ToString();
}
else if (str.Length == 2)
{
value = dd[str[0]][str[1]].ToString();
}
conModels.Add(new ConditionalModel() { FieldName = vakey.TrimEnd('@'), ConditionalType = ConditionalType.Equal, FieldValue = value });
}
else if (vakey.EndsWith("~"))//不等于
{
conModels.Add(new ConditionalModel() { FieldName = vakey.TrimEnd('~'), ConditionalType = ConditionalType.NoEqual, FieldValue = fieldValue });
}
else if (IsCol(subtable, vakey)) //其他where条件
{
conModels.Add(new ConditionalModel() { FieldName = vakey, ConditionalType = ConditionalType.Equal, FieldValue = fieldValue });
}
}
tb.Where(conModels);
//排序
ProcessOrder(subtable, values, tb);
//分组
PrccessGroup(subtable, values, tb);
//Having
ProcessHaving(values, tb);
return tb;
}
//处理字段重命名 "@column":"toId:parentId"，对应SQL是toId AS parentId，将查询的字段toId变为parentId返回
private void ProcessColumn(string subtable, string selectrole, JObject values, ISugarQueryable<ExpandoObject> tb)
{
var str = new System.Text.StringBuilder(100);
foreach (var item in values["@column"].ToString().Split(','))
{
string[] ziduan = item.Split(':');
string colName = ziduan[0];
var ma = new Regex(@"\((\w+)\)").Match(colName);
//处理max，min这样的函数
if (ma.Success && ma.Groups.Count > 1)
{
colName = ma.Groups[1].Value;
}
//判断列表是否有权限 sum(1)，sum(*),Count(1)这样的值直接有效
if (colName == "*" || int.TryParse(colName, out int colNumber) || (IsCol(subtable, colName) && _identitySvc.ColIsRole(colName, selectrole.Split(','))))
{
if (ziduan.Length > 1)
{
if (ziduan[1].Length > 20)
{
throw new Exception("别名不能超过20个字符");
}
str.Append(ziduan[0] + " as `" + ReplaceSQLChar(ziduan[1]) + "`,");
}
else
str.Append("`" + ziduan[0] + "`" + ",");
}
}
if (string.IsNullOrEmpty(str.ToString()))
{
throw new Exception($"表名{subtable}没有可查询的字段！");
}
tb.Select(str.ToString().TrimEnd(','));
}
// "@having":"function0(...)?value0;function1(...)?value1;function2(...)?value2..."，
// SQL函数条件，一般和 @group一起用，函数一般在 @column里声明
private void ProcessHaving(JObject values, ISugarQueryable<ExpandoObject> tb)
{
if (values["@having"].IsValue())
{
List<IConditionalModel> hw = new List<IConditionalModel>();
List<string> havingItems = new List<string>();
if (values["@having"].HasValues)
{
havingItems = values["@having"].Select(p => p.ToString()).ToList();
}
else
{
havingItems.Add(values["@having"].ToString());
}
foreach (var item in havingItems)
{
string and = item.ToString();
var model = new ConditionalModel();
if (and.Contains(">="))
{
model.FieldName = and.Split(new string[] { ">=" }, StringSplitOptions.RemoveEmptyEntries)[0];
model.ConditionalType = ConditionalType.GreaterThanOrEqual;
model.FieldValue = and.Split(new string[] { ">=" }, StringSplitOptions.RemoveEmptyEntries)[1];
}
else if (and.Contains("<="))
{
model.FieldName = and.Split(new string[] { "<=" }, StringSplitOptions.RemoveEmptyEntries)[0];
model.ConditionalType = ConditionalType.LessThanOrEqual;
model.FieldValue = and.Split(new string[] { "<=" }, StringSplitOptions.RemoveEmptyEntries)[1];
}
else if (and.Contains(">"))
{
model.FieldName = and.Split(new string[] { ">" }, StringSplitOptions.RemoveEmptyEntries)[0];
model.ConditionalType = ConditionalType.GreaterThan;
model.FieldValue = and.Split(new string[] { ">" }, StringSplitOptions.RemoveEmptyEntries)[1];
}
else if (and.Contains("<"))
{
model.FieldName = and.Split(new string[] { "<" }, StringSplitOptions.RemoveEmptyEntries)[0];
model.ConditionalType = ConditionalType.LessThan;
model.FieldValue = and.Split(new string[] { "<" }, StringSplitOptions.RemoveEmptyEntries)[1];
}
else if (and.Contains("!="))
{
model.FieldName = and.Split(new string[] { "!=" }, StringSplitOptions.RemoveEmptyEntries)[0];
model.ConditionalType = ConditionalType.NoEqual;
model.FieldValue = and.Split(new string[] { "!=" }, StringSplitOptions.RemoveEmptyEntries)[1];
}
else if (and.Contains("="))
{
model.FieldName = and.Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries)[0];
model.ConditionalType = ConditionalType.Equal;
model.FieldValue = and.Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries)[1];
}
hw.Add(model);
}
//var d = db.Context.Utilities.ConditionalModelToSql(hw);
//tb.Having(d.Key, d.Value);
tb.Having(string.Join(",", havingItems));
}
}
//"@group":"column0,column1..."，分组方式。如果 @column里声明了Table的id，则id也必须在 @group中声明；其它情况下必须满足至少一个条件:
//1.分组的key在 @column里声明
//2.Table主键在 @group中声明
private void PrccessGroup(string subtable, JObject values, ISugarQueryable<ExpandoObject> tb)
{
if (values["@group"].IsValue())
{
var str = new System.Text.StringBuilder(100);
foreach (var and in values["@group"].ToString().Split(','))
{
if (IsCol(subtable, and))
{
str.Append(and + ",");
}
}
tb.GroupBy(str.ToString().TrimEnd(','));
}
}
//处理排序 "@order":"name-,id"查询按 name降序、id默认顺序 排序的User数组
private void ProcessOrder(string subtable, JObject values, ISugarQueryable<ExpandoObject> tb)
{
if (values["@order"].IsValue())
{
foreach (var item in values["@order"].ToString().Split(','))
{
string col = item.Replace("-", "").Replace("+", "");
if (IsCol(subtable, col))
{
if (item.EndsWith("-"))
{
tb.OrderBy($"{col} desc");
}
else if (item.EndsWith("+"))
{
tb.OrderBy($"{col} asc");
}
else
{
tb.OrderBy($"{col}");
}
}
}
}
}
//条件查询 "key{}":"条件0,条件1..."，条件为任意SQL比较表达式字符串，非Number类型必须用''包含条件的值，如'a'
//&, |, ! 逻辑运算符，对应数据库 SQL 中的 AND, OR, NOT。
// 横或纵与：同一字段的值内条件默认 | 或连接，不同字段的条件默认 & 与连接。
// ① & 可用于"key&{}":"条件"等
// ② | 可用于"key|{}":"条件", "key|{}":[] 等，一般可省略
// ③ ! 可单独使用，如"key!":Object，也可像&,|一样配合其他功能符使用
private void ConditionQuery(string subtable, List<IConditionalModel> conModels, KeyValuePair<string, JToken> va)
{
string vakey = va.Key.Trim();
string field = vakey.TrimEnd("{}".ToCharArray());
if (va.Value.HasValues)
{
List<string> inValues = new List<string>();
foreach (var cm in va.Value)
{
inValues.Add(cm.ToString());
}
conModels.Add(new ConditionalModel()
{
FieldName = field.TrimEnd("!".ToCharArray()),
ConditionalType = field.EndsWith("!") ? ConditionalType.NotIn : ConditionalType.In,
FieldValue = string.Join(",", inValues)
});
}
else
{
var ddt = new List<KeyValuePair<WhereType, ConditionalModel>>();
foreach (var and in va.Value.ToString().Split(','))
{
var model = new ConditionalModel();
model.FieldName = field.TrimEnd("&".ToCharArray());//处理&()的查询方式
if (and.StartsWith(">="))
{
model.ConditionalType = ConditionalType.GreaterThanOrEqual;
model.FieldValue = and.TrimStart(">=".ToCharArray());
}
else if (and.StartsWith("<="))
{
model.ConditionalType = ConditionalType.LessThanOrEqual;
model.FieldValue = and.TrimStart("<=".ToCharArray());
}
else if (and.StartsWith(">"))
{
model.ConditionalType = ConditionalType.GreaterThan;
model.FieldValue = and.TrimStart('>');
}
else if (and.StartsWith("<"))
{
model.ConditionalType = ConditionalType.LessThan;
model.FieldValue = and.TrimStart('<');
}
ddt.Add(new KeyValuePair<WhereType, ConditionalModel>((field.EndsWith("&") ? WhereType.And : WhereType.Or), model));
}
conModels.Add(new ConditionalCollections() { ConditionalList = ddt });
}
}
//"key%":"start,end" => "key%":["start,end"]，其中 start 和 end 都只能为 Boolean, Number, String 中的一种，如 "2017-01-01,2019-01-01" ，["1,90000", "82001,100000"] ，可用于连续范围内的筛选
private void ConditionBetween(string subtable, List<IConditionalModel> conModels, KeyValuePair<string, JToken> va)
{
string vakey = va.Key.Trim();
string field = vakey.TrimEnd("%".ToCharArray());
List<string> inValues = new List<string>();
if (va.Value.HasValues)
{
foreach (var cm in va.Value)
{
inValues.Add(cm.ToString());
}
}
else
{
inValues.Add(va.Value.ToString());
}
for (var i = 0; i < inValues.Count; i++)
{
var fileds = inValues[i].Split(',');
if (fileds.Length == 2)
{
var ddt = new List<KeyValuePair<WhereType, ConditionalModel>>();
var leftCondition = new ConditionalModel()
{
FieldName = field,
ConditionalType = ConditionalType.GreaterThanOrEqual,
FieldValue = fileds[0]
};
ddt.Add(new KeyValuePair<WhereType, ConditionalModel>(i == 0 ? WhereType.And : WhereType.Or, leftCondition));
var rightCondition = new ConditionalModel()
{
FieldName = field,
ConditionalType = ConditionalType.LessThanOrEqual,
FieldValue = fileds[1]
};
ddt.Add(new KeyValuePair<WhereType, ConditionalModel>(WhereType.And, rightCondition));
conModels.Add(new ConditionalCollections() { ConditionalList = ddt });
}
}
}
//模糊搜索 "key$":"SQL搜索表达式" => "key$":["SQL搜索表达式"]，任意SQL搜索表达式字符串，如 %key%(包含key), key%(以key开始), %k%e%y%(包含字母k,e,y) 等，%表示任意字符
private void FuzzyQuery(string subtable, List<IConditionalModel> conModels, KeyValuePair<string, JToken> va)
{
string vakey = va.Key.Trim();
string fieldValue = va.Value.ToString();
var conditionalType = ConditionalType.Like;
if (IsCol(subtable, vakey.TrimEnd('$')))
{
//支持三种like查询
if (fieldValue.StartsWith("%") && fieldValue.EndsWith("%"))
{
conditionalType = ConditionalType.Like;
}
else if (fieldValue.StartsWith("%"))
{
conditionalType = ConditionalType.LikeRight;
}
else if (fieldValue.EndsWith("%"))
{
conditionalType = ConditionalType.LikeLeft;
}
conModels.Add(new ConditionalModel() { FieldName = vakey.TrimEnd('$'), ConditionalType = conditionalType, FieldValue = fieldValue.TrimEnd("%".ToArray()).TrimStart("%".ToArray()) });
}
}
//处理sql注入
private string ReplaceSQLChar(string str)
{
if (str == String.Empty)
return String.Empty;
str = str.Replace("'", "");
str = str.Replace(";", "");
str = str.Replace(",", "");
str = str.Replace("?", "");
str = str.Replace("<", "");
str = str.Replace(">", "");
str = str.Replace("(", "");
str = str.Replace(")", "");
str = str.Replace("@", "");
str = str.Replace("=", "");
str = str.Replace("+", "");
str = str.Replace("*", "");
str = str.Replace("&", "");
str = str.Replace("#", "");
str = str.Replace("%", "");
str = str.Replace("$", "");
str = str.Replace("\"", "");
//删除与数据库相关的词
str = Regex.Replace(str, "delete from", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "drop table", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "truncate", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "xp_cmdshell", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "exec master", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "net localgroup administrators", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "net user", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "-", "", RegexOptions.IgnoreCase);
str = Regex.Replace(str, "truncate", "", RegexOptions.IgnoreCase);
return str;
}
}