如何捕获客户端代码中出现的任何异常，如Chrome开发人员工具上的“暂停捕获的异常”？
我找到了解决方案！
我使用过C＃和MVC。
添加一个新类来自定义您的js文件包，如下所示：
public class CustomScriptBundle : ScriptBundle
{
public CustomScriptBundle(string virtualPath) : base(virtualPath)
{
Builder = new CustomScriptBundleBuilder();
}
public CustomScriptBundle(string virtualPath, string cdnPath)
: base(virtualPath, cdnPath)
{
Builder = new CustomScriptBundleBuilder();
}
}
并且，创建另一个类来更改js文件的内容，如下所示::
class CustomScriptBundleBuilder : IBundleBuilder
{
private string Read(BundleFile file)
{
//read file
FileInfo fileInfo = new FileInfo(HttpContext.Current.Server.MapPath(@file.IncludedVirtualPath));
using (var reader = fileInfo.OpenText())
{
return reader.ReadToEnd();
}
}
public string BuildBundleContent(Bundle bundle, BundleContext context, IEnumerable<BundleFile> files)
{
var content = new StringBuilder();
foreach (var fileInfo in files)
{
var contents = new StringBuilder(Read(fileInfo));
//a regular expersion to get catch blocks
const string pattern = @"\bcatch\b(\s*)*\((?<errVariable>([^)])*)\)(\s*)*\{(?<blockContent>([^{}])*(\{([^}])*\})*([^}])*)\}";
var regex = new Regex(pattern);
var matches = regex.Matches(contents.ToString());
for (var i = matches.Count - 1; i >= 0; i--) //from end to start! (to avoid loss index)
{
var match = matches[i];
//catch( errVariable )
var errVariable = match.Groups["errVariable"].ToString();
//start index of catch block
var blockContentIndex = match.Groups["blockContent"].Index;
var hasContent = match.Groups["blockContent"].Length > 2;
contents.Insert(blockContentIndex,
string.Format("if(customErrorLogging)customErrorLogging({0}){1}", errVariable, hasContent ? ";" : ""));
}
var parser = new JSParser(contents.ToString());
var bundleValue = parser.Parse(parser.Settings).ToCode();
content.Append(bundleValue);
content.AppendLine(";");
}
return content.ToString();
}
}
现在，将您的js文件包含在您的类的应用程序包中：
BundleTable.Bundles.Add(new CustomScriptBundle("~/scripts/vendor").Include("~/scripts/any.js"));
最后，在一个新的js文件中编写如下所述的customErrorLogging函数，并将其添加到项目的主html表单中：
"use strict";
var customErrorLogging = function (ex) {
//do something
};
window.onerror = function (message, file, line, col, error) {
customErrorLogging({
message: message,
file: file,
line: line,
col: col,
error: error
}, this);
return true;
};
现在，您可以捕获应用程序中的所有异常并管理它们:)
您可以使用try / catch块：
try {
myUnsafeFunction(); // this may cause an error which we want to handle
}
catch (e) {
logMyErrors(e); // here the variable e holds information about the error; do any post-processing you wish with it
}
如名称所示，您尝试在“try”块中执行一些代码。如果抛出错误，您可以在“catch”块中执行特定任务（例如，以特定方式记录错误）。
还有更多选项可供使用：根据抛出的错误类型等，您可以拥有多个“catch”块。更多信息请访问：https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/try...catch
看一个小例子如何捕获异常：
try {
alert("proper alert!");
aert("error this is not a function!");
}
catch(err) {
document.getElementById("demo").innerHTML = err.message;
}<body>
<p id="demo"></p>
</body>将代码放入try Block并尝试捕获catch Block中的错误。