我正在添加 HTML 数据属性，但我对数据属性名称的标准转换感到困惑。我了解单字数据属性（data-name=""或data-id=""）等，但是如果我在数据属性名称中使用多个单词，那么约定是什么？我是否将两个单词 ( data-product_id="" or data-product-id="") 或某种形式的驼峰式命名法分开，例如：data-productID=""？
我正在使用这个插件https://pub.dev/packages/razorpay_flutter
Razorpay 在支付页面崩溃
flutter run在模拟器和真实设备中工作正常。但之后flutter build apk，应用程序崩溃了_razorpay.open(options);
，并且插件没有在 Visual Studio Code 终端中显示崩溃报告或任何错误。
final _razorpay = Razorpay();
_razorpay.on(Razorpay.EVENT_PAYMENT_SUCCESS, _handlePaymentSuccess);
_razorpay.on(Razorpay.EVENT_PAYMENT_ERROR, _handlePaymentError);
_razorpay.on(Razorpay.EVENT_EXTERNAL_WALLET, _handleExternalWallet);
var options = {
'key': 'rzp_test_xxxxxxx',
'amount': 100, //in the smallest currency sub-unit.
'name': 'Acme Corp.',
'description': 'Fine T-Shirt',
'prefill': {'contact': '9123456789', 'email': 'test.kumar@example.com'}
};
print('0');
try {
print('1');
_razorpay.open(options);
print('2');
} catch (e) {
print('error');
debugPrint(e);
}
在 Visual Studio 代码终端中
11-05 00:22:29.197 21170 21209 I flutter : 0
11-05 …我在 Azure DevOps 中为我的 Function App 设置了一个构建管道，它利用了 nuget 缓存，从而利用了 package.lock.json 文件。但是，我不断遇到包验证哈希问题，例如：
Package content hash validation failed for Microsoft.Extensions.DependencyInjection.2.2.0. Expected: ASF77AJjnyi9hL7IJU1KCAvnCTgI3JEwkU+D4gnKd53nFIYpibVjR6SW8tdTkkuZ+QkmIx2rPvKdTMNVPfVU9A== Actual: MZtBIwfDFork5vfjpJdG5g8wuJFt7d/y3LOSVVtDK/76wlbtz6cjltfKHqLx2TKVqTj5/c41t77m1+h20zqtPA==
Package content hash validation failed for Microsoft.Extensions.DependencyInjection.Abstractions.2.2.0. Expected: 2xMk9LHz1EY+7gVG0lG4qBvkUiVjg8QNPqd2HYmEP5+PL7Ayo96EhBieAhd++Gx4yM+xN8kNqmhZdFMBHeG0HQ== Actual: f9hstgjVmr6rmrfGSpfsVOl2irKAgr1QjrSi3FgnS7kulxband50f2brRLwySAQTADPZeTdow0mpSMcoAdadCw==
Package content hash validation failed for runtime.fedora.24-x64.runtime.native.System.Security.Cryptography.OpenSsl.4.3.0. Expected: c3YNH1GQJbfIPJeCnr4avseugSqPrxwIqzthYyZDN6EuOyNOzq+y2KSUfRcXauya1sF4foESTgwM5e1A8arAKw== Actual: LdIvj7Bi2jiaNTqY/ezZGVXHe1KI5fjLSI026O1TjVzsmdgTP/zTF+f3nwHCjwttyhsPBEiswv0PekimPWZwWg==
Package content hash validation failed for runtime.native.System.IO.Compression.4.3.0. Expected: INBPonS5QPEgn7naufQFXJEp3zX6L4bwHgJ/ZH78aBTpeNfQMtf7C6VrAFhlq2xxWBveIOWyFzQjJ8XzHMhdOQ== Actual: b+V9JC/Ii3sR659flBeaBJww111425tgjcDS1k+hqV4sGh9FALRDBvJnDtQ895gAzpPTUOFDHdqaZ2Et7BpZMg==
Package content hash validation failed for runtime.osx.10.10-x64.runtime.native.System.Security.Cryptography.Apple.4.3.0. Expected: kVXCuMTrTlxq4XOOMAysuNwsXWpYeboGddNGpIgNSZmv1b6r/s/DPk0fYMB7Q5Qo4bY68o48jt4T4y5BVecbCQ== Actual: Kh9W4agE0r/hK8AX1LvyQI2NrKHBL8pO0gRoDTdDb0LL6Ta1Z2OtFx3lOaAE0ZpCUc/dt9Wzs3rA7a3IsKdOVA==
Package content hash validation failed for runtime.ubuntu.14.04-x64.runtime.native.System.Security.Cryptography.OpenSsl.4.3.0. Expected: ytoewC6wGorL7KoCAvRfsgoJPJbNq+64k2SqW6JcOAebWsFUvCCYgfzQMrnpvPiEl4OrblUlhF2ji+Q1+SVLrQ== Actual: JGc0pAWRE8lB4Ucygk2pYSKbUPLlAIq6Bczf5/WF2D/VKJEPtYlVUMxk8fbl1zRfTWzSHi+VcFZlaPlWiNxeKg==
Package content hash …我尝试在桌面上运行/调试我的应用程序（使用所有默认值安装 Visual Studio 2019 后），但我不能:)并且发生了此错误：
D:\Visual Studio IDE\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(240,5): error MSB8066: Custom build for 'D:\Location\Some Location\MyFlutterAppLocation\build\windows\CMakeFiles\a50fa560346c71769b697565b5a2d59b\flutter_windows.dll.rule;D:\Location\MyFlutterAppLocation\build\windows\CMakeFiles\eb8cecdef0b53de6eb232004d53dfd8a\flutter_assemble.rule' exited with code 1. [D:\Location\Some Location\MyFlutterAppLocation\build\windows\flutter\flutter_assemble.vcxproj]
Exception: Build process failed.
我今天遇到了一个有趣的问题,我有两种方法,一目了然,它们都做同样的事情.那是返回一个IEnumerable的Foo对象.
我在下面将它们定义为List1和List2:
public class Foo
{
public int ID { get; set; }
public bool Enabled { get; set;}
}
public static class Data
{
public static IEnumerable<Foo> List1
{
get
{
return new List<Foo>
{
new Foo {ID = 1, Enabled = true},
new Foo {ID = 2, Enabled = true},
new Foo {ID = 3, Enabled = true}
};
}
}
public static IEnumerable<Foo> List2
{
get
{
yield return new Foo {ID = 1, Enabled = true}; …如何在C#中获取内存MS Windows 7的当前页面大小？
在某些情况下,我们需要它以最佳方式分配内存.
谢谢!
更新:这是一个示例代码......我对这条线有一些疑问 byte[] buffer = new byte[4096];
// Assign values to these objects here so that they can
// be referenced in the finally block
Stream remoteStream = null;
Stream localStream = null;
WebResponse response = null;
try
{
response = request.EndGetResponse(result);
if (response != null)
{
// Once the WebResponse object has been retrieved, get the stream object associated with the response's data
remoteStream = response.GetResponseStream();
// Create the local file
string pathToSaveFile = Path.Combine(FileManager.GetFolderContent(), …我有这个C#代码将数据集转换为xlsx.有没有办法设置创建的xlsx文件的工作表的单元格或列宽？
//Get the filename
String filepath = args[0].ToString();
//Convert the file to dataset
DataSet ds = Convert(filepath.ToString(), "tblCustomers", "\t");
//Create the excell object
Excel.Application excel = new Excel.Application();
//Create the workbook
Excel.Workbook workBook = excel.Workbooks.Add();
//Set the active sheet
Excel.Worksheet sheet = workBook.ActiveSheet;
int i = 0;
foreach (DataRow row in ds.Tables[0].Rows)
{
for (int j = 0; j < row.ItemArray.Length; j++)
{
sheet.Cells[i + 1, j + 1] = row[j];
}
i++;
}
workBook.SaveAs(@"C:\fromCsv.xlsx");
workBook.Close();
TF400151:团队资源管理器无法在SharePoint网站上完成上载事务.刷新然后再试一次.
我尝试上传某些文档时遇到此错误
我的TFS2010发生了什么？
我正在使用Windows窗体应用程序,我有一个名为的组合框cmbCountry.我将这个组合框绑定到一个包含国家名称的列表.以下是填充组合框的代码.
cmbCountry.DataSource = lstcountry;
接下来我想将所选项目设置为" 美国 ".所以我添加了以下代码
cmbCountry.SelectedItem="United States of America";
我想在这个组合框的选择更改事件上做一些代码.
private void cmbCountry_SelectionChangeCommitted(object sender, EventArgs e)
{
\\some code
}
假设在设置所选项目时调用此方法.但它没有被召集.但是当我从UI部分(设计部分)选择" 美利坚合众国 "这个事件被召唤.我想在设置所选项目时调用此事件.
我有一个列表,如果尚未实例化,可能为null,我想在调用GetList()时能够返回现有或创建列表然后返回.这看起来更干净:
private List<object> m_objects;
public List<object> GetList()
{
m_objects = m_objects ?? new List<object>();
return m_objects;
}
但是将列表设置为自身会有性能损失,还是C#意识到这不是必需的？
替代方案是:
private List<object> m_objects;
public List<object> GetList()
{
if(m_objects != null)
{
return m_objects;
}
m_objects = new List<object>();
return m_objects;
}
显然不是世界末日,但我仍然很好奇.