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vb.net传参数 vbnet sender

IT技术parameters

vb.net引用传递Private Function ReadFile(ByRef a As String) As String
a = "bian"
End Function
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim a As String = "yuanlai"
【vb.net传参数 vbnet sender】ReadFile(a)
''想要的结果就是在这里使用a的值是"bian"
MsgBox(a)
End Sub
===================
以上就可以，不知道你“ByRef a As b”的b是什么东西
VB.NET 将参数传入 存储过程 的 问题?//存储过程代码
CREATE PROCEDURE [AddNewInvoiceInfo] (@sUserID int,@sClaimMethod varchar(50),@sInvoiceNumvarchar(50),@sInvoiceDate datetime,@sBuyCity varchar(50))AS
Insert Into SMB_InvoiceInfo (MemberID,ClaimMethod,InvoiceNum,InvoiceDate,InvoiceCity) Values(@sUserID,@sClaimMethod,@sInvoiceNum,@sInvoiceDate,@sBuyCity)
return@@IDENTITY
GO
//调用存储过程代码
Dim CN As New SqlConnection()
Dim InvoiceID As String
Try
CN.ConnectionString = DBConStr
CN.Open()
Dim CMD As SqlCommand
CMD = New SqlCommand(AddNewInvoiceInfo, CN)
CMD.CommandType = CommandType.StoredProcedure
CMD.Parameters.Add(New SqlParameter(@sUserID, SqlDbType.Int))
CMD.Parameters(@sUserID).Value = https://www.04ip.com/post/CInt(UserID.Text)
CMD.Parameters.Add(New SqlParameter(@sClaimMethod, SqlDbType.VarChar, 50))
CMD.Parameters(@sClaimMethod).Value = https://www.04ip.com/post/TransName.Text
CMD.Parameters.Add(New SqlParameter(@sInvoiceNum, SqlDbType.VarChar, 50))
CMD.Parameters(@sInvoiceNum).Value = https://www.04ip.com/post/InvoiceNum.Text
CMD.Parameters.Add(New SqlParameter(@sInvoiceDate, SqlDbType.DateTime))
CMD.Parameters(@sInvoiceDate).Value = https://www.04ip.com/post/InvoiceDate.SelectedDate.Date
CMD.Parameters.Add(New SqlParameter(@sBuyCity, SqlDbType.VarChar, 50))
CMD.Parameters(@sBuyCity).Value = https://www.04ip.com/post/BuyCity.Text
CMD.Parameters.Add(New SqlParameter(@sInvoiceID, SqlDbType.Int))
CMD.Parameters(@sInvoiceID).Direction = ParameterDirection.ReturnValue
CMD.ExecuteNonQuery()
InvoiceID = CMD.Parameters(@sInvoiceID).Value.ToString()
CMD.Dispose()
Catch ex As Exception
Response.Write(ex.ToString())
Finally
CN.Close()
End Try
c# 或vb.net Sub过程中定义传递参数使用可选参数,(以C#4.0为例)
static int plus(int a,int b, int c=0)
{
return a b c;
}
vb.net2005:2个form之间传递参数的问题，高手进把form1设为启动项在form3中调用当然是空啊 。因为这时候还没有发生form2的load事件 。你可以在form1的load事件里面对form2的变量付值然后把form2对象传给form3，或者fom2里的变量设为静态的这样不用传对象
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