189 8069 5689
System.Runtime.InteropServices.DllImport("user32.dll") _
专注于为中小企业提供网站设计、做网站服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业瑞昌免费做网站提供优质的服务。我们立足成都，凝聚了一批互联网行业人才，有力地推动了近千家企业的稳健成长，帮助中小企业通过网站建设实现规模扩充和转变。
Public Shared Function SetWindowLong(hWnd As IntPtr, nIndex As Integer, wndproc As Integer) As Integer
End Function
System.Runtime.InteropServices.DllImport("user32.dll") _
Public Shared Function GetWindowLong(hWnd As IntPtr, nIndex As Integer) As Integer
End Function
Public Const GWL_STYLE As Integer = -16
Public Const WS_DISABLED As Integer = H8000000
Public Shared Sub SetControlEnabled(c As Control, enabled As Boolean)
If enabled Then
SetWindowLong(c.Handle, GWL_STYLE, (Not WS_DISABLED) And GetWindowLong(c.Handle, GWL_STYLE))
Else
SetWindowLong(c.Handle, GWL_STYLE, WS_DISABLED + GetWindowLong(c.Handle, GWL_STYLE))
End If
End Sub
授人以渔：
这个网站超牛逼
Option Explicit On
Option Strict On
Imports System
Module Program
Sub Main()
Dim y,m,t As Integer
begin:
' 输入数据时一行一个
y=CInt(Console.ReadLine())
m=CInt(Console.ReadLine())
t=CInt(Console.ReadLine())
If y100 Then
y=y+2000
End If
If y1916 OrElse m200 Then
Console.WriteLine("ERROR")
goto begin
End If
pr(y,m,t)
Console.Write("Press any key to continue . . . ")
Console.ReadKey(True)
End Sub
Function pr(y As Integer,m As Integer,t As Integer) As Integer
Dim ye,[Me],i As Integer
ye=CInt((m+t-2)/12+y)
[Me]=(m+t-2) Mod 12+1
Console.WriteLine(" {0}-{1} ~ {2}-{3}",y,m,ye,[Me])
ye=y
[Me]=m
For i=0 To t-1
prmonth(ye,[me])
[Me]=[Me]+1
If [Me]12 Then
ye=ye+1
[me]=1
End If
Next
Return 0
End Function
Function yam(y As Integer,m As Integer) As Integer
Dim st As String()={"未定义","一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"}
Console.WriteLine(" {0} {1}",y,st(m))
Console.WriteLine("----------------------------")
Return 0
End Function
Function ryear(y As Integer) As Integer
If 0=y Mod 400 OrElse (0y Mod 100 AndAlso 0=y Mod 4) Then
Return 1
Else
Return 0
End If
End Function
Function mday(y As Integer,m As Integer) As Integer
Dim day As Integer()={0,31,28,31,30,31,30,31,31,30,31,30,31}
Dim ad As Integer=0
If 2=m Then
ad=ryear(y)
End If
Return day(m)+ad
End Function
Function monday(y As Integer,m As Integer) As Integer
Dim md As Integer=6
Dim i,daynum As Integer
For i=1916 To y-1
daynum=365+ryear(i)
md=(md+daynum) Mod 7
Next
For i=1 To m-1
md=(md+mday(y,i)) Mod 7
Next
Return md
End Function
Function prmonth(y As Integer,m As Integer) As Integer
Dim md As Integer=monday(y,m)
Dim daysnum As Integer=mday(y,m)
Dim days As Integer=daysnum+md
Dim i As Integer
yam(y,m)
Console.Write(" 日 一 二 三 四 五 六")
For i=0 To days-1
If 0=i Mod 7 Then
Console.WriteLine()
Console.WriteLine()
Console.Write(" ")
End If
If i-md=0 Then
Console.Write(" {0,2}",i-md+1)
Else
Console.Write(" ")
End If
Next
Console.WriteLine()
Console.WriteLine()
Return 0
End Function
End Module
Option Explicit On
Option Strict On
Imports System
Module Program
Sub Main()
Dim y,m,t As Integer
begin:
' 输入数据时一行一个
y=CInt(Console.ReadLine())
m=CInt(Console.ReadLine())
t=CInt(Console.ReadLine())
If y
200 Then
Console.WriteLine("ERROR")
goto begin
End If
pr(y,m,t)
Console.Write("Press any key to continue . . . ")
Console.ReadKey(True)
End Sub
Function pr(y As Integer,m As Integer,t As Integer) As Integer
Dim ye,[Me],i As Integer
ye=CInt((m+t-2)/12+y)
[Me]=(m+t-2) Mod 12+1
End If
End Function
Function mday(y As Integer,m As Integer) As Integer
Dim day As Integer()={0,31,28,31,30,31,30,31,31,30,31,30,31}
Dim ad As I
强制类型转换在VB.NET中用Ctype()函数实现的。
Dim drv As DataRowView = CType(comboBox1.SelectedItem, DataRowView)
另外：comboBox1.SelectedItem 不是 string 类型，而是 object 类型。ComboBox 下拉显示文字是通过调用 Object.ToString() 方法实现的。