Question

我从数据库查询中获取一个JSON字符串，该数据库查询从多个表中选择数据并返回记录列表，然后将JSON设为，

var result = db.Database.SqlQuery<JobNoQ>(query).ToList(); 
string json = JsonConvert.SerializeObject(result);

然后我开始关注JSON：

"[{\"S1\":\"1\",\"S2\":\"202010010\",\"S30\":\"COCA COLA BEVERAGES PAKISTAN LTD. GUJRANWALA\",\"S31\":\"Coca cola 1\",\"D1\":\"2015-07-01T00:00:00\",\"S5\":\"001\",\"S32\":\"Local\",\"S6\":\"T1\",\"S33\":\"By Road\",\"S10\":\"\"},
  {\"S1\":\"3\",\"S2\":\"202010010\",\"S30\":\"COCA COLA BEVERAGES PAKISTAN LTD. GUJRANWALA\",\"S31\":\"Coca cola 1\",\"D1\":\"2015-07-01T00:00:00\",\"S5\":\"002\",\"S32\":\"Innter City\",\"S6\":\"T1\",\"S33\":\"By Road\",\"S10\":\"\"},
  {\"S1\":\"4\",\"S2\":\"202010010\",\"S30\":\"COCA COLA BEVERAGES PAKISTAN LTD. GUJRANWALA\",\"S31\":\"Coca cola 1\",\"D1\":\"2015-07-01T00:00:00\",\"S5\":\"003\",\"S32\":\"International\",\"S6\":\"T2\",\"S33\":\"By Sea\",\"S10\":\"\"}
 ]"

我想从此数组中删除\。我试过以下：

1. string json = json.Replace("\"", " "); // It removes \ and all "" from the array. I only want to remove the \ 

2. string json = json.Replace(@"\", " "); // It does nothing

Answer 1

您的JSON中没有任何反斜杠，这就是为什么用@"\"替换" "无效。您的调试器很有用但令人困惑地将您的JSON字符串转换为C＃字符串语法，这意味着您的调试器在您看到的任何\之前添加"。如果你真的让你的代码打印出JSON字符串，你会发现它们不存在。

Answer 2

C＃中的\反斜杠就是所谓的escape character。您必须添加另一个斜杠以逃避现有斜杠：

string json = @"Test\string\replace";
json = json.Replace("\\", " ");
Console.WriteLine(json);

输出：

测试字符串替换

使用OP的字符串：

var result = db.Database.SqlQuery<JobNoQ>(query).ToList(); 
string json = JsonConvert.SerializeObject(result);
json = json.Replace("\\", " ");
Console.WriteLine(json);

输出：

[{ "S1 ": "1 ", "S2 ": "202010010 ", "S30 ": "COCA COLA BEVERAGES PAKISTAN LTD. GUJRANWALA ", "S31 ": "Coca cola 1 ", "D1 ": "2015-07-01T00:00:00 ", "S5 ": "001 ", "S32 ": "Local ", "S6 ": "T1 ", "S33 ": "By Road ", "S10 ": " "},
{ "S1 ": "3 ", "S2 ": "202010010 ", "S30 ": "COCA COLA BEVERAGES PAKISTAN LTD. GUJRANWALA ", "S31 ": "Coca cola 1 ", "D1 ": "2015-07-01T00:00:00 ", "S5 ": "002 ", "S32 ": "Innter City ", "S6 ": "T1 ", "S33 ": "By Road ", "S10 ": " "},
{ "S1 ": "4 ", "S2 ": "202010010 ", "S30 ": "COCA COLA BEVERAGES PAKISTAN LTD. GUJRANWALA ", "S31 ": "Coca cola 1 ", "D1 ": "2015-07-01T00:00:00 ", "S5 ": "003 ", "S32 ": "International ", "S6 ": "T2 ", "S33 ": "By Sea ", "S10 ": " "}
]

仅从JSON中删除\

2 个答案: