使用 itextsharp 检查 pdf 复选框 [英] Checking off pdf checkbox with itextsharp

问题描述

我尝试了很多不同的方法，但我无法选中复选框！这是我尝试过的:

I've tried so many different ways, but I can't get the check box to be checked! Here's what I've tried:

var reader = new iTextSharp.text.pdf.PdfReader(originalFormLocation);
using (var stamper = new iTextSharp.text.pdf.PdfStamper(reader,ms)) {
    var formFields = stamper.AcroFields;
    formFields.SetField("IsNo", "1");
    formFields.SetField("IsNo", "true");
    formFields.SetField("IsNo", "On");
}

它们都不起作用.有什么想法吗?

None of them work. Any ideas?

推荐答案

您不应该猜测"可能的值.您需要使用存储在 PDF 中的值.尝试使用 CheckBoxValues 示例来查找这些可能的值:

You shouldn't "guess" for the possible values. You need to use a value that is stored in the PDF. Try the CheckBoxValues example to find these possible values:

public String getCheckboxValue(String src, String name) throws IOException {
    PdfReader reader = new PdfReader(SRC);
    AcroFields fields = reader.getAcroFields();
    // CP_1 is the name of a check box field
    String[] values = fields.getAppearanceStates("IsNo");
    StringBuffer sb = new StringBuffer();
    for (String value : values) {
        sb.append(value);
        sb.append('
');
    }
    return sb.toString();
}

或者使用 RUPS 查看 PDF.转到小部件注释并查找正常 (/N) 外观 (AP) 状态.在我的例子中，它们是 /Off 和 /Yes:

Or take a look at the PDF using RUPS. Go to the widget annotation and look for the normal (/N) appearance (AP) states. In my example they are /Off and /Yes:

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