How to use iframe display html file from database in ASP.NET? -

i trying display html file model in view. iframe tag seems best choose, don't konw how write url "src" attribute.

i saw example using image tag display image database this:

<imag src="data:@model.imagemimetype; base64, @convert.tobase64string(model.imagedata)"> 

so learn case , built model html file below:

public byte[] htmldata { get; set; }  public string htmltype { get; set; } 

when coding in view form image tag case:

<iframe src="data:@model.htmltype; base64, @convert.tobase64string(model.htmldata)"/> 

in view, shows plain text of html file. guess convert method not appropriate. should display html file using iframe tag?