I import the PDFSharp 1.50.5147 version using NuGet and tried to generate the matrix code using the code below
Code:
var myXSize = new XSize(130, 130);
var myNewCode = new PdfSharp.Drawing.BarCodes.CodeDataMatrix("Content", 144, myXSize);
var myXPoint = new XPoint(630, 50);
//gfx.DrawMatrixCode(myNewCode, myXPoint);
But when I execute the code it return error "Value cannot be null. Parameter name: image" as below:
Code:
[ArgumentNullException: Value cannot be null.
Parameter name: image]
PdfSharp.Drawing.XGraphics.DrawImage(XImage image, Double x, Double y, Double width, Double height) +174
PdfSharp.Drawing.BarCodes.CodeDataMatrix.Render(XGraphics gfx, XBrush brush, XPoint position) +2637
PdfSharp.Drawing.XGraphics.DrawMatrixCode(MatrixCode matrixcode, XPoint position) +147
learners.pages.Class.ViewCompletedAssessment.btnDownloadCert_Click(Object sender, EventArgs e) in E:\Inetpub\wwwroot\learners\learners\pages\Class\ViewCompletedAssessment.aspx.cs:181
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +11758656
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +150
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5028
It seems that the "DrawMatrixCode" function will call "DrawImage" function and I dig the source code and found it should run the code below:
Code:
if (MatrixImage == null)
MatrixImage = DataMatrixImage.GenerateMatrixImage(Text, Encoding, Rows, Columns);
However, it seems that the image is not generated. Does anyone can come up with some advise?
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