标准答案是（CBrush *pBrush=dc.SelectStockObject(NULL_BRUSH); ）修改为（CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH)); )错误原因是不能把一个指针转化为对象，使用FromHandle就可以把指针转化为一个临时对象。你可以试着使用 CBrush *pBrus
Cannot convert from 'Object to Int' Cannot convert int[] to object[] Cannot convert lambda expression to type 'System.Threading.Tasks.Task' Cannot convert null to 'int' because it is a value type--need help Cannot convert string[] to string in foreach loop Cannot convert type 'System.Col...
Conversion operators cannot convert from Object Conversion operators cannot convert to an interface type Conversion operators cannot convert to Object Conversion operators must be declared either 'Widening' or 'Narrowing' Conversions from '<typename1>' to '<typename2>' must be explicit Copying the valu...
给list加一个泛型就可以了。这样：List<Channel> list = this.channelManager.getChannelListByFather(Integer.valueOf(block.getContent()));if (list != null) { buffer.append("<ul>");for (Channel ch : list) { buffer.append("<li><a href=").append(new StringBuilder().append(mark)...
Type mismatch: cannot convert from Object to Car at com.tt.spring.beans.factory.Main.main(Main.java:12) 原因分析: 第一, 需要装 jre1.5.0及以上的版本 第二, 在eclipse的'Window' 'Preference' 'Java'里, 'Install JREs'里设置你装的jre ...
编译报错:/build-testQtSignalBug-Qt5_9_4_zynq-Debug/moc_subclass.cpp:68: error: cannot convert from pointer to base class 'QObject' to pointer to derived class 'subClass' via virtual base 'baseClass' subClass *_t = static_cast<subClass *>(_o); ...
record, the code I have was converted from VB to C# and I receive the following error: "Cannot implicitly convert type 'object' to 'Easysol_V1._1.Components.clsItemData'. An explicit conversion exists (are you missing a cast?)" I don't exactly how to fix the problem, here...
TypeError: cannot convert the series to <class 'int'> This error usually occurs when you try to convert a series object into integer data type. The following tutorial shows a detailed example that causes this error and how to fix it. ...
Typeerror cannot convert the series to class float – Solutions Here are the alternative solutions to Solve the TypeError“cannot convert the series to class float”: Solution 1. Usepd.to_numeric()method: You need to ensure that your data has consistent data types. ...
Math on a column, it has to be a numeric type, so your column type should be a float which is the more common use case. If you do not convert it into the float type, you will get an error that would be something like thisTypeError: cannot convert the series to <class 'float'>....