表格背景图像消失 [英] Form Background Image Disappears

问题描述

我使用以下代码获取表单的背景图片

Private Sub mnuBgroundImage_Click（ByVal sender As System.Object，ByVal e As System.EventArgs）处理mnuBgroundImage。 Clic

如果OpenFileDialog1.ShowDialog（）= DialogResult.OK

Dim sr As New System.IO.StreamReader（OpenFileDialog1.FileName

Me .BackgroundImage = Image.FromFile（OpenFileDialog1.FileName

sr.Close（

End I

End Su


这很好用。但是，这是在frmMain上，当我切换到form2然后返回到frmMain时，背景图像消失了。我在这里缺少什么


谢谢

John

I am using the following code to get a background image for my form

Private Sub mnuBgroundImage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuBgroundImage.Clic
If OpenFileDialog1.ShowDialog() = DialogResult.OK The
Dim sr As New System.IO.StreamReader(OpenFileDialog1.FileName
Me.BackgroundImage = Image.FromFile(OpenFileDialog1.FileName
sr.Close(
End I
End Su

This works great. However, this is on frmMain and when I switch to form2 and then return to frmMain the background image is gone. What am I missing here

Thank you
John

推荐答案

*" =？Utf-8？B？amNyb3VzZQ ==？="< an*******,discussions.microsoft.com> scripsit：

* "=?Utf-8?B?amNyb3VzZQ==?=" <an*******@discussions.microsoft.com> scripsit:

我使用以下代码获取表单的背景图片：

私有子mnuBgroundImage_Click（BYVAL sender As System.Object，ByVal e As System.EventArgs）处理mnuBgroundImage.Click
如果OpenFileDialog1.ShowDialog（）= DialogResult.OK然后
Dim sr As New System.IO.StreamReader（OpenFileDialog1.FileName）
Me.BackgroundImage = Image.FromFile（OpenFileDialog1.FileName）
sr.Close（）
结束如果
结束子

这很好用。但是，这是在frmMain上，当我切换到form2然后返回到frmMain时，背景图像消失了。我在这里缺少什么？

I am using the following code to get a background image for my form:

Private Sub mnuBgroundImage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuBgroundImage.Click
If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
Dim sr As New System.IO.StreamReader(OpenFileDialog1.FileName)
Me.BackgroundImage = Image.FromFile(OpenFileDialog1.FileName)
sr.Close()
End If
End Sub

This works great. However, this is on frmMain and when I switch to form2 and then return to frmMain the background image is gone. What am I missing here?

你如何切换并返回？两个表格在同一时间或者一个接一个的时间内可见吗？


-

Herfried K. Wagner [ MVP]

< URL：http：//dotnet.mvps.org/>

How do you "switch and return"? Are the two forms visible at the same
time or one after the other?

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

如果您不使用它，为什么要创建流阅读器？为什么不这样做？b $ b你尝试这样的事情吗？


Private Sub mnuBgroundImage_Click（ByVal sender As System.Object，ByVal
$ b $是
As System.EventArgs）处理mnuBgroundImage.Click


如果OpenFileDialog1.ShowDialog（）= DialogResult.OK那么

Dim sr As New System.IO.StreamReader（OpenFileDialog1.FileName）

Dim bm as new Bitmap（sr）

sr.Close（）

Me.BackgroundImage = bm

结束如果

结束子


肯

---- ---------


" jcrouse" <一个******* @ discussions.microsoft.com>在消息中写道

新闻：2F ********************************** @ microsof t.com:

Hi,

Why are you creating a stream reader if you are not using it? Why don''t
you try something like this?

Private Sub mnuBgroundImage_Click(ByVal sender As System.Object, ByVal
e
As System.EventArgs) Handles mnuBgroundImage.Click

If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
Dim sr As New System.IO.StreamReader(OpenFileDialog1.FileName)
Dim bm as new Bitmap(sr)
sr.Close()
Me.BackgroundImage = bm
End If
End Sub

Ken
-------------

"jcrouse" <an*******@discussions.microsoft.com> wrote in message
news:2F**********************************@microsof t.com:

我使用以下代码获取表单的背景图片：

Private Sub mnuBgroundImage_Click（ByVal sender As System.Object，ByVal e
As System.EventArgs）处理mnuBgroundImage.Click
如果OpenFileDialog1.ShowDialog（）= DialogResult.OK然后
Dim sr As New System.IO.StreamReader（OpenFileDialog1.FileName）
我。 BackgroundImage = Image.FromFile（OpenFileDialog1.FileName）
sr.Close（）
结束如果
结束子

这很好用。但是，这是在frmMain上，当我切换到form2
然后返回到frmMain时，背景图像消失了。我在想什么？

谢谢你，
约翰

I am using the following code to get a background image for my form:

Private Sub mnuBgroundImage_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles mnuBgroundImage.Click
If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
Dim sr As New System.IO.StreamReader(OpenFileDialog1.FileName)
Me.BackgroundImage = Image.FromFile(OpenFileDialog1.FileName)
sr.Close()
End If
End Sub

This works great. However, this is on frmMain and when I switch to form2
and then return to frmMain the background image is gone. What am I missing
here?

Thank you,
John

-

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可能是因为我不知道自己在做什么。当我使用你的代码时


Private Sub mnuBgroundImage_Click（ByVal sender As System.Object，ByVal e

As System.EventArgs）处理mnuBgroundImage.Clic


如果OpenFileDialog1.ShowDialog（）= DialogResult.OK

Dim sr As New System.IO.StreamReader（OpenFileDialog1.FileName

Dim bm作为新的位图（sr

sr.Close（

Me.BackgroundImage = b

结束我

结束Su


它不喜欢线条Dim bm as New Bitmap（sr）。它强调了sr并说了很多关于不能转换自...到...


更多想法

Joh

Probably because I have no idea what I am doing. When I use your code

Private Sub mnuBgroundImage_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles mnuBgroundImage.Clic

If OpenFileDialog1.ShowDialog() = DialogResult.OK The
Dim sr As New System.IO.StreamReader(OpenFileDialog1.FileName
Dim bm as new Bitmap(sr
sr.Close(
Me.BackgroundImage = b
End I
End Su

It doesn''t like the line "Dim bm as New Bitmap(sr)". It underlines the "sr" and says a lot about can''t convert from ... to ..

Any more ideas
Joh

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