Question

我在ASP.NET中使用ITextSharp生成PDF。我需要显示一个表，一些数据和序列号自动递增。我尝试了以下（使用循环 - 增量），但它似乎不起作用。

Dim dsGetStudentFeeDetails = dbl.usp_GetFeeReceiptDetailsForStudent(sid).AsQueryable

        For Each f1 In dsGetStudentFeeDetails
            Dim i As Integer = 1
            stuName = New PdfPCell(FormatPhrase(i))
            'stuName.Colspan = 4
            'stuName.Border = 0
            stuName.NoWrap = True
            stuName.HorizontalAlignment = Element.ALIGN_LEFT
            pdftable4.AddCell(stuName)

            stuName = New PdfPCell(FormatPhrase(f1.FeeAmountPaidDate))
            'stuName.Colspan = 4
            'stuName.Border = 0
            stuName.NoWrap = True
            stuName.HorizontalAlignment = Element.ALIGN_LEFT
            pdftable4.AddCell(stuName)

            i = i + 1
        Next

当我在执行期间执行此操作时，我注意到i = i + 1没有增加。为什么这样？

Answer 1

你必须声明并设置默认值以上代码

下面的循环使用

Dim dsGetStudentFeeDetails = dbl.usp_GetFeeReceiptDetailsForStudent(sid).AsQueryable
          Dim i As Integer = 1
        For Each f1 In dsGetStudentFeeDetails

            stuName = New PdfPCell(FormatPhrase(i))
            'stuName.Colspan = 4
            'stuName.Border = 0
            stuName.NoWrap = True
            stuName.HorizontalAlignment = Element.ALIGN_LEFT
            pdftable4.AddCell(stuName)

            stuName = New PdfPCell(FormatPhrase(f1.FeeAmountPaidDate))
            'stuName.Colspan = 4
            'stuName.Border = 0
            stuName.NoWrap = True
            stuName.HorizontalAlignment = Element.ALIGN_LEFT
            pdftable4.AddCell(stuName)

            i = i + 1
        Next

增加PDF创建中的序列号 - ASP.NET

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