1  public string CreatUpdate()
  2         {
  3
  4             StringPlus strclass = new StringPlus();
  5             StringPlus strclass1 = new StringPlus();
  6             StringPlus strclass2 = new StringPlus();
  7            //方法注释
  8             strclass.AppendSpaceLine(2, "/// <summary>");
  9             strclass.AppendSpaceLine(2, "/// " + Languagelist["summaryUpdate"].ToString());
 10             strclass.AppendSpaceLine(2, "/// </summary>");
 11             //构建方法指定方法形参为要更改的数据表对应的实体对象
 12             strclass.AppendSpaceLine(2, "public bool Update(" + ModelSpace + " model)");
 13             strclass.AppendSpaceLine(2, "{");
 14             //构建StringBuilder实例装在Sql语句
 15             strclass.AppendSpaceLine(3, "StringBuilder strSql=new StringBuilder();");
 16             strclass.AppendSpaceLine(3, "strSql.Append(\"update " + _tablename + " set \");");
 17             //表中所有列，获取列名、数据类型、长度、是否只增及是否为主键
 18             foreach (ColumnInfo field in Fieldlist)
 19             {
 20                 string columnName = field.ColumnName;
 21                 string columnType = field.TypeName;
 22                 string Length = field.Length;
 23                 bool IsIdentity = field.IsIdentity;
 24                 bool isPK = field.IsPrimaryKey;
 25
 26                 strclass1.AppendSpaceLine(3, "db.AddInParameter(dbCommand, \"" + columnName + "\", DbType." + CSToProcType(columnType) + ", model." + columnName + ");");
 27
 28                 if (field.IsIdentity || field.IsPrimaryKey || (Keys.Contains(field)))
 29                 {
 30                     continue;
 31                 }
 32                   // 构建赋值语句
 33                 strclass.AppendSpaceLine(3, "strSql.Append(\"" + columnName + "=" + preParameter + columnName + ",\");");
 34             }
 35
 36
 37             //去掉最后的逗号
 38             strclass.DelLastComma();
 39             strclass.AppendLine("\");");
 40             //构建Where条件
 41             strclass.AppendSpaceLine(3, "strSql.Append(\" where " + GetWhereExpression(Keys) + "\");");
 42
 43              //创建命令对象
 44             strclass.AppendSpaceLine(3, "Database db = DatabaseFactory.CreateDatabase();");
 45             strclass.AppendSpaceLine(3, "DbCommand dbCommand = db.GetSqlStringCommand(strSql.ToString());");
 46
 47
 48             strclass.Append(strclass1.Value);
 49             //向数据库提交sql语句并返回执行结果
 50             strclass.AppendSpaceLine(3, "int rows=db.ExecuteNonQuery(dbCommand);\r\n");
 51             //判断结果并返回相应提示
 52             strclass.AppendSpaceLine(3, "if (rows > 0)");
 53             strclass.AppendSpaceLine(3, "{");
 54             strclass.AppendSpaceLine(4, "return true;");
 55             strclass.AppendSpaceLine(3, "}");
 56             strclass.AppendSpaceLine(3, "else");
 57             strclass.AppendSpaceLine(3, "{");
 58             strclass.AppendSpaceLine(4, "return false;");
 59             strclass.AppendSpaceLine(3, "}");
 60
 61
 62             strclass.AppendSpaceLine(2, "}");
 63             return strclass.ToString();
 64         }