Question

如何使用颜色随机的文本框背面颜色？

textbox1.backcolor = color.**random**;

Answer 1

使用Random-class。您可以从System.Drawing.KnownColor-enum：

获取所有已知颜色

KnownColor[] colors = (KnownColor[])Enum.GetValues(typeof(System.Drawing.KnownColor));
colors = Array.FindAll(colors, c => c =! KnownColor.Transparent); // is not allowed
Random r = new Random();
KnownColor randomColor = colors[r.Next(colors.Length)];
textbox1.BackColor = Color.FromKnownColor(randomColor);

请注意，您不应该在循环中调用此代码，否则它将始终生成相同的＆＃34;随机＆＃34;数字，因为它是以当前时间播种的。而是重用相同的随机实例。因此，如果它在循环中声明并初始化循环外的随机变量。

Answer 2

呃，这样的事情？

08:57:20 **** Build of configuration gcc-debug for project DB ****
make MODE=debug CONFIGNAME=gcc-debug all 
dbSyncSensor.cc
Makefile:93: recipe for target 'out/gcc-debug//dbSyncSensor.o' failed
In file included from dbSyncSensor.cc:11:0:
C:\Program Files (x86)\MySQL\MySQL Connector C++ 1.1.6\include\mysql_connection.h:30:32: fatal error: cppconn/connection.h: No such file or directory
 #include <cppconn/connection.h>
                                ^
compilation terminated.
make: *** [out/gcc-debug//dbSyncSensor.o] Error 1

08:57:21 Build Finished (took 1s.629ms)

如何在文本框中使用不同颜色的背景色？

2 个答案: