C# 检查控制字符

我想检查字符串以确保它不包含任何控制字符。我已经想出了这个解决办法。您是否同意它足以达到预期目的？有什么明显的我遗漏的吗

        string input = "2cancer＇.pdf";

        char[] chars = input.ToCharArray();

        foreach (var c in chars)
        {
            if(c == 127 || (c < ' ' && c != '\t'))
            {
                throw new Exception("Control character detected");
            }
        }     

string input=“2cancer'.pdf”；
char[]chars=input.ToCharArray（）；
foreach（以字符表示的变量c）
{
如果（c==127 | |（c<'&&c！='\t'））
{
抛出新异常（“检测到控制字符”）；
}
}     

背景是将文件上载到RavenDB时出现问题，它抱怨文件名包含无效的控制字符，即'，因此我希望检测到无效的控制字符，并将其删除或引发异常以提醒用户，尽管我可能会执行前者

异常的堆栈跟踪是：

    [ArgumentException: Specified value has invalid Control characters.
    Parameter name: value]
       System.Net.WebHeaderCollection.CheckBadChars(String name, Boolean isHeaderValue) +8426470
       System.Net.WebHeaderCollection.Set(String name, String value) +86
       Raven.Client.Connection.HttpJsonRequest.WriteMetadata(RavenJObject metadata) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\HttpJsonRequest.cs:573
       Raven.Client.Connection.HttpJsonRequest..ctor(CreateHttpJsonRequestParams requestParams, HttpJsonRequestFactory factory) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\HttpJsonRequest.cs:91
       Raven.Client.Connection.HttpJsonRequestFactory.CreateHttpJsonRequest(CreateHttpJsonRequestParams createHttpJsonRequestParams) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\HttpJsonRequestFactory.cs:57
       Raven.Client.Connection.ServerClient.DirectPutAttachment(String key, RavenJObject metadata, Nullable`1 etag, Stream data, String operationUrl) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\ServerClient.cs:490
       Raven.Client.Connection.<>c__DisplayClass19.<PutAttachment>b__18(String operationUrl) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\ServerClient.cs:441
       Raven.Client.Connection.<>c__DisplayClassa.<ExecuteWithReplication>b__9(String operationUrl) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\ServerClient.cs:167
       Raven.Client.Connection.ReplicationInformer.TryOperation(Func`2 operation, String operationUrl, Boolean avoidThrowing, T& result) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\ReplicationInformer.cs:564
       Raven.Client.Connection.ReplicationInformer.ExecuteWithReplication(String method, String primaryUrl, Int32 currentRequest, Int32 currentReadStripingBase, Func`2 operation) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\ReplicationInformer.cs:523
       Raven.Client.Connection.ServerClient.ExecuteWithReplication(String method, Func`2 operation) in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Connection\ServerClient.cs:174

[ArgumentException:指定的值具有无效的控制字符。
参数名称：值]
System.Net.WebHeaderCollection.CheckBadChars（字符串名称，布尔值）+8426470
System.Net.WebHeaderCollection.Set（字符串名称、字符串值）+86
c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\HttpJsonRequest.WriteMetadata（RavenObject元数据）中的Raven.Client.Connection.HttpJsonRequest.WriteMetadata
c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\HttpJsonRequest.cs:91中的Raven.Client.Connection.HttpJsonRequest..ctor（创建httpjsonrequestparams requestParams，HttpJsonRequestFactory工厂）
c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\HttpJsonRequestFactory.CreateHttpJsonRequest（CreateHttpJsonRequestParams CreateHttpJsonRequestParams）中的Raven.Client.Connection.HttpJsonRequestFactory.createHttpJsonRequestFactory（CreateHttpJsonRequestParams CreateHttpJsonRequestParams）：57
c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\ServerClient.DirectPutAttachment（字符串键，RavenObject元数据，null`1 etag，流数据，字符串操作URL）中的Raven.Client.Connection.ServerClient.DirectPutAttachment
Raven.Client.Connection.c__在c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\ServerClient.cs:441中显示Class19.b__18（字符串操作URL）
Raven.Client.Connection.c\uuu在c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\ServerClient.cs:167中显示ClassA.b\uuu 9（字符串操作URL）
c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\ReplicationInformer.tryooperation（Func`2操作、字符串操作URL、布尔值避免抛出、T&result）中的Raven.Client.Connection.ReplicationInformer.tryooperation（Func`2操作、字符串操作URL、布尔值避免抛出、T&result）
c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\ReplicationInformer.ExecuteWithReplication（字符串方法、字符串primaryUrl、Int32 currentRequest、Int32 currentReadStripingBase、Func`2操作）中的Raven.Client.Connection.ReplicationInformer.ExecuteWithReplication
c:\Builds\RavenDB Stable\Raven.Client.Lightweight\Connection\ServerClient.cs:174中的Raven.Client.Connection.ServerClient.ExecuteWithReplication（字符串方法，Func`2操作）

---

我知道这是我正在使用的RavenDB版本中的一个错误，但是目前我无法升级数据库。

用于检查字符是否为控制字符。

用于检查字符是否为控制字符。

作为一个补充，

字符串

实现了`

IEnumerable

，所以你实际上可以做

foreach（输入中的var c）

。另外，

string

实现了`

IEnumerable

，所以你实际上可以做

foreach（输入中的var c）

。哇，太棒了！TaThis可以将您的检查简化为

input.Any（char.IsControl）

哇，太棒了！这可以简化您对

input.Any（char.IsControl）

    string input = "2cancer＇.pdf";

    char[] chars = input.ToCharArray();

    foreach (var c in chars)
    {
        if (char.IsPunctuation(c) || char.IsSymbol(c) || char.IsControl(c))
        {
            throw new Exception("Control character detected");
        }
    }