IronBarcode 无法识别 MSI 条码

Curtis Chau

已更新:2025年8月19日

Translated

View the article in English

问题

使用IronBarcode库创建MSI条码时，某些情况下BarcodeReader.Read方法无法读取生成的MSI条码，导致扫描结果为空以及预期的条码值。

解决方案

为确保BarcodeReaderOptions参数。在ExpectedBarcodeTypes。这样，Read方法可以识别由IronBarcode生成的MSI条码以及任何外部的MSI条码。

下面是一个如何将BarcodeReader.Read的快速示例。

代码示例

// Creating MSI Barcode with the value "12345"
var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.MSI);

// Save barcode as image
myBarcode.SaveAsImage("msi.png");

// Reading MSI
var barcodeReaderOptions = new BarcodeReaderOptions
{
     // Assigning BarcodeEncoding.MSI to ExpectBarcodeType to ensure that IronBarcode expects MSI type barcodes specifically 
  ExpectBarcodeTypes = BarcodeEncoding.MSI,
};

// Read barcode with additional barcodeReaderOptions from above
var barcodeResults = BarcodeReader.Read("msi.png", barcodeReaderOptions);

// Using a for loop and print out the result 
foreach (BarcodeResult result in barcodeResults)
{
  Console.WriteLine(result.Text);
    // Output: 12345 
}

// Creating MSI Barcode with the value "12345"
var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.MSI);

// Save barcode as image
myBarcode.SaveAsImage("msi.png");

// Reading MSI
var barcodeReaderOptions = new BarcodeReaderOptions
{
     // Assigning BarcodeEncoding.MSI to ExpectBarcodeType to ensure that IronBarcode expects MSI type barcodes specifically 
  ExpectBarcodeTypes = BarcodeEncoding.MSI,
};

// Read barcode with additional barcodeReaderOptions from above
var barcodeResults = BarcodeReader.Read("msi.png", barcodeReaderOptions);

// Using a for loop and print out the result 
foreach (BarcodeResult result in barcodeResults)
{
  Console.WriteLine(result.Text);
    // Output: 12345 
}

' Creating MSI Barcode with the value "12345"
Dim myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.MSI)

' Save barcode as image
myBarcode.SaveAsImage("msi.png")

' Reading MSI
Dim barcodeReaderOptions As New BarcodeReaderOptions With {.ExpectBarcodeTypes = BarcodeEncoding.MSI}

' Read barcode with additional barcodeReaderOptions from above
Dim barcodeResults = BarcodeReader.Read("msi.png", barcodeReaderOptions)

' Using a for loop and print out the result 
For Each result As BarcodeResult In barcodeResults
  Console.WriteLine(result.Text)
	' Output: 12345 
Next result

$vbLabelText $csharpLabel

在示例中，我们首先实例化一个新的ExpectedBarcodeTypes赋值，指示IronBarcode预期为MSI条码。之后，我们在for循环中打印出条码的值，即12345，因为BarcodeResults数组，并遍历每个结果获取文本值。