Why does the image display with reduced quality when scrolling up and down in the report viewer

kana2506...

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User: kana250688
Posted: on Jun 13, 2025 08:21 PM
Forum: ASP.Net Web Forms
Replies: 6
Views: 186

Dear Sir,

Why does the image display with reduced quality when scrolling up and down in the report viewer?.

Please Guide me.

I have attached the video and image link below.

Video and image

Thanks

Imports Microsoft.Reporting.WinForms

Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        Me.ReportViewer1.RefreshReport()
        Me.ReportViewer1.SetDisplayMode(Microsoft.Reporting.WinForms.DisplayMode.PrintLayout)
        ReportViewer1.ZoomMode = ZoomMode.Percent
        ReportViewer1.ZoomPercent = 50
    End Sub
End Class

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Joey

0 6

Reply
User: Joey
Replied: on Jun 14, 2025 07:22 AM
Report

Hi kana250688,

When scrolling in a ReportViewer, image quality appear reduced due to scaling or rendering limitations.

When dealing with large images or when the ReportViewer is zoomed in.

The ReportViewer do not use advanced scaling algorithms to optimize rendering performance, so a drop in image quality during scrolling.

To maintain smooth scrolling, the ReportViewer prioritize speed over image quality, choosing simpler scaling methods that are less computationally intensive.

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Why does the image display with reduced quality when scrolling up and down in the report viewer

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