1. When infragistics netadvantage is used to do this, a problem may occur, that is, although the showmodaldialog function opens a subwindow, a new window will pop up when selecting a row of ultrawebgrid, the solution is to add the following content to the HTML page:
< Head >
< Base Target = " _ Self " >
</ Head >
Although this method is used to solve the problem in the pop-up window, the updated value cannot be displayed when using infragistics controls such as webtextedit. The updated value can be displayed by changing to the control in visualstudio.net. so I finally gave up on its use, because the time was not that long. I think the infragistics statement is not very good. I don't have a complete introduction to a control attribute, nor a reference table or Microsoft, because since you did it based on people's things, therefore, it is necessary to provide a quick way to get started so that the software can be easily used.
2. Finally, the control provided by visualstudio.net was used to solve this problem.