Question

I m 试图将一个表格物体储存成一个变数,但不能成功:

该法典没有工作:

Dim invoice_form As billing_new_invoice

     Get last remote Row
    Dim last_row As Integer = CType(main.ActiveMdiChild, invoice_form).invoiceitems_new_invoice.Rows.Count - 1

    Dim count_row As Integer = CType(main.ActiveMdiChild, invoice_form).invoiceitems_new_invoice.Rows.Count()

该法典规定:

Dim invoice_form As billing_new_invoice

     Get last remote Row
    Dim last_row As Integer = CType(main.ActiveMdiChild, billing_new_invoice).invoiceitems_new_invoice.Rows.Count - 1

    Dim count_row As Integer = CType(main.ActiveMdiChild, billing_new_invoice).invoiceitems_new_invoice.Rows.Count()

“Error”/

I need to store the form instance in the variable (invoice_form), that could be used in multiple lines of code, but it says (Type invoice_form is not defined.) Anyone have idea to solve this ?

Answer 1

不清楚问题是什么。我认为,你正在寻找这样的东西:

If TypeOf Me.ActiveMdiChild Is billing_new_invoice Then
  Dim invoice_Form As billing_new_invoice = Me.ActiveMdiChild

  Dim last_row As Integer = invoice_form.invoiceitems_new_invoice.Rows.Count - 1
  Dim count_row As Integer = invoice_form.invoiceitems_new_invoice.Rows.Count()

  // etc

End If

现行法典的问题在于,它试图把它变成一个变量,而不是一种类型。 <代码>invoice_form是一个变量,billing_new_invoice<>code>为一类。

Answer 2

CType用于类型转换,而不是变式转让。你们想要做的是先把变量分配给形式,然后使用这一变量:

Dim invoice_form As billing_new_invoice = CType(main.ActiveMdiChild, billing_new_invoice)
Dim last_row As Integer = invoice_form.invoiceitems_new_invoice.Rows.Count - 1

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