在gridview中动态显示图像 [英] Dynamically displaying images in a gridview
问题描述
我已经google了并尝试了各种方法，但无法解决这个问题。\\ b
问题。 MSDN上的文章：在GridView列中显示图像
只显示一个简单的情况，其中gridview的所有数据（包括图像）来自单个表/数据源。
这是我的情况。在我的网络应用程序中，我需要在gridview中显示
客户账单信息。
客户名称和联系信息来自Customer表。
如果客户的账单已过期，我会在该行的最后一个
中显示一个红色圆圈。
如果客户的账单已经支付，我在该行的最后一栏
中显示一个绿色圆圈。
如果客户的账单不是到期时，我在该行的最后一栏
中显示一个蓝色圆圈。
简单，对吧？
这些小彩色圆圈可以来自数据库表格或来自
ArrayList。
我在最后一栏中尝试过模板字段然后将图像控件的
ImageUrl绑定到我在代码隐藏中的方法，
如下：
< asp：Image ... ImageUrl =''<％＃GetIconPath（）％>''....>< / asp：图片>
它没有不工作。
我删除了Image控件，只是尝试了：
< img src =''GetIconPath（）''/> ;
它仍然无效。
然后，我尝试使用Label控件并在后面的代码中我说
lblImageURL.Text ="< img src =''" + GetIconPath（）+"''/>" ;;
它仍然无法正常工作。
然后，我创建了另一个页面GetIconPath.aspx，它简单地输出
图标的路径为字符串，如〜/ Images / red_cirlce.jpg，以及
在图像中控制，我说
< asp：Image .... ImageUrl =" GetIconPath.aspx" ...>< / asp：图片>
它仍然拒绝工作。
我试过< asp：ImageFieldinstead of < asp：TemplateField>，它仍然是
拒绝工作。我已经花了一整天的时间来处理这个问题，并且无法解决这个问题。
任何提示都非常受欢迎。
< gn ******** @ gmail.comwrote in message
news：11 *** *******************@57g2000hsv.googlegro ups.com ...
任何提示都非常感谢。
当这样的事情发生时，我首先想到的是相对路径...
你是否*绝对确定*那个各种图像文件的路径是
正确...？
请记住< asp：Imagewebcontrol的ImageUrl属性是
期望指向图形的相对或绝对URL，例如jpg，bmp，
gif等：
http://msdn2.microsoft.com/en-us/lib...rl(vs80).aspx
当您执行查看源代码并检查HTML时，是否会对
内容产生影响......？
-
Mark Rae
ASP.NET MVP
http://www.markrae.net
如果是我，我'在gridview的onRowBound处理程序中执行此操作 -
将允许您访问该行的数据。从那以后你就可以发现支付/延迟/不迟到的状态以及直接将src放入
图像标签的机会。
john
< gn ******** @ gmail.comwrote in message
news：11 ***** *****************@57g2000hsv.googlegro ups.com ...
我用google搜索并尝试过各种方法，但无法解决这个问题。 MSDN上的文章：在GridView列中显示图像
只显示一个简单的情况，其中gridview的所有数据（包括图像）来自单个表/数据源。
这是我的情况。在我的网络应用程序中，我需要在gridview中显示
客户账单信息。
客户名称和联系信息来自Customer表。
如果客户的账单已过期，我会在该行的最后一个
中显示一个红色圆圈。
如果客户的账单已经支付，我在该行的最后一栏
中显示一个绿色圆圈。
如果客户的账单不是到期时，我在该行的最后一栏
中显示一个蓝色圆圈。
简单，对吧？
这些小彩色圆圈可以来自数据库表格或来自
ArrayList。
我在最后一栏中尝试过模板字段然后将图像控件的
ImageUrl绑定到我在代码隐藏中的方法，
如下：
< asp：Image ... ImageUrl =''<％＃GetIconPath（）％>''....>< / asp：图片>
它没有k。
我删除了Image控件并尝试了：
< img src =''GetIconPath（）''/>
它仍然无法正常工作。
然后，我尝试使用Label控件并在后面的代码中我说
lblImageURL.Text ="< img src =''" + GetIconPath（）+"''/>" ;;
它仍然无法正常工作。
然后，我创建了另一个页面GetIconPath.aspx，它简单地输出
图标的路径为字符串，如〜/ Images / red_cirlce.jpg，以及
在图像中控制，我说
< asp：Image .... ImageUrl =" GetIconPath.aspx" ...>< / asp：图片>
它仍然拒绝工作。
我试过< asp：ImageFieldinstead of < asp：TemplateField>，它仍然是
拒绝工作。我已经花了一整天的时间来处理这个问题，并且无法解决这个问题。
任何提示都非常受欢迎。
9月4日晚上10点54分，gnewsgr ... @ gmail.com写道：
我已经google了并尝试了各种方法，但无法解决这个问题。 MSDN上的文章：在GridView列中显示图像
只显示一个简单的情况，其中gridview的所有数据（包括图像）来自单个表/数据源。
这是我的情况。在我的网络应用程序中，我需要在gridview中显示
客户账单信息。
客户名称和联系信息来自Customer表。
如果客户的账单已过期，我会在该行的最后一个
中显示一个红色圆圈。
如果客户的账单已经支付，我在该行的最后一栏
中显示一个绿色圆圈。
如果客户的账单不是到期时，我在该行的最后一栏
中显示一个蓝色圆圈。
简单，对吧？
这些小彩色圆圈可以来自数据库表格或来自
ArrayList。
我在最后一栏中尝试过模板字段然后将图像控件的
ImageUrl绑定到我在代码隐藏中的方法，
如下：
< asp：Image ... ImageUrl =''<％＃GetIconPath（）％>''....>< / asp：图片>
它没有k。
我删除了Image控件并尝试了：
< img src =''GetIconPath（）''/>
它仍然无法正常工作。
然后，我尝试使用Label控件并在后面的代码中我说
lblImageURL.Text ="< img src =''" + GetIconPath（）+"''/>" ;;
它仍然无法正常工作。
然后，我创建了另一个页面GetIconPath.aspx，它简单地输出
图标的路径为字符串，如〜/ Images / red_cirlce.jpg，以及
在图像中控制，我说
< asp：Image .... ImageUrl =" GetIconPath.aspx" ...>< / asp：图片>
它仍然拒绝工作。
我试过< asp：ImageFieldinstead of < asp：TemplateField>，它仍然是
拒绝工作。我已经花了一整天的时间来处理这个问题，并且无法解决这个问题。
任何提示都非常受欢迎。
例如
< asp：TemplateColumn>
< ItemTemplate>
<％＃"< img src =''" + GetIconPath（）+"''>"％>
< / ItemTemplate>
< / asp：TemplateColumn>
I''ve googled and tried various approaches, but could not resolve this
problem. The article at MSDN: Displaying Images in a GridView Column
only presents a simple case where all data (including the images) of
the gridview come from a single table/datasource.
Here is my situation. In my web application, I need to display
customer bills info in a gridview.
Customer names and contact info are from the Customer table.
If a customer''s bill is past due, I display a red circle in the last
coumn of that row.
If a customer''s bill has been paid, I display a green circle in the
last column of that row.
If a customer''s bill isn''t past due, I display a blue circle in the
last column of that row.
Simple, right?
These little colorful circles can be from a database table or from an
ArrayList.
I''ve tried a template field in the last column and then bind the
ImageUrl of the Image Control to a method I have in the code-behind,
like so:
<asp:Image ... ImageUrl=''<%# GetIconPath() %>'' ....></asp:Image>
It did not work.
I removed the Image control and simply tried:
<img src=''GetIconPath()'' />
And it still did not work.
Then, I tried using a Label control and in the code behind I say
lblImageURL.Text = "<img src=''" + GetIconPath() + "''/>";
It still didn''t work.
Then, I created another page GetIconPath.aspx, which simply outputs
the path of the icon as a string like "~/Images/red_cirlce.jpg", and
in the Image control, I say
<asp:Image .... ImageUrl="GetIconPath.aspx" ... ></asp:Image>
It still refuses to work.
I tried <asp:ImageFieldinstead of <asp:TemplateField>, and it still
refuses to work. I''ve spent the whole day working on this, and cannot
resolve this problem.
Any hint is highly appreciated.
<gn********@gmail.comwrote in message
news:11**********************@57g2000hsv.googlegro ups.com...
Any hint is highly appreciated.When something like this happens, my first thought is relative paths...
Are you *absolutely sure* that the path to the various image files is
correct...?
Bear in mind that the ImageUrl property of an <asp:Imagewebcontrol is
expecting a relative or absolute URL pointing to a graphic e.g. jpg, bmp,
gif etc:
http://msdn2.microsoft.com/en-us/lib...rl(vs.80).aspx
When you do a View Source and inspect the HTML, does that shed any light on
things...?
--
Mark Rae
ASP.NET MVP
http://www.markrae.net
If it were me I''d do this in the onRowBound handler for the gridview -- that
would give you access to the data for that row. From that you could detect
the paid/late/not late status and the chance to directly drop the src into
an image tag.
john
<gn********@gmail.comwrote in message
news:11**********************@57g2000hsv.googlegro ups.com...I''ve googled and tried various approaches, but could not resolve this
problem. The article at MSDN: Displaying Images in a GridView Column
only presents a simple case where all data (including the images) of
the gridview come from a single table/datasource.
Here is my situation. In my web application, I need to display
customer bills info in a gridview.
Customer names and contact info are from the Customer table.
If a customer''s bill is past due, I display a red circle in the last
coumn of that row.
If a customer''s bill has been paid, I display a green circle in the
last column of that row.
If a customer''s bill isn''t past due, I display a blue circle in the
last column of that row.
Simple, right?
These little colorful circles can be from a database table or from an
ArrayList.
I''ve tried a template field in the last column and then bind the
ImageUrl of the Image Control to a method I have in the code-behind,
like so:
<asp:Image ... ImageUrl=''<%# GetIconPath() %>'' ....></asp:Image>
It did not work.
I removed the Image control and simply tried:
<img src=''GetIconPath()'' />
And it still did not work.
Then, I tried using a Label control and in the code behind I say
lblImageURL.Text = "<img src=''" + GetIconPath() + "''/>";
It still didn''t work.
Then, I created another page GetIconPath.aspx, which simply outputs
the path of the icon as a string like "~/Images/red_cirlce.jpg", and
in the Image control, I say
<asp:Image .... ImageUrl="GetIconPath.aspx" ... ></asp:Image>
It still refuses to work.
I tried <asp:ImageFieldinstead of <asp:TemplateField>, and it still
refuses to work. I''ve spent the whole day working on this, and cannot
resolve this problem.
Any hint is highly appreciated.
On Sep 4, 10:54 pm, gnewsgr...@gmail.com wrote:I''ve googled and tried various approaches, but could not resolve this
problem. The article at MSDN: Displaying Images in a GridView Column
only presents a simple case where all data (including the images) of
the gridview come from a single table/datasource.
Here is my situation. In my web application, I need to display
customer bills info in a gridview.
Customer names and contact info are from the Customer table.
If a customer''s bill is past due, I display a red circle in the last
coumn of that row.
If a customer''s bill has been paid, I display a green circle in the
last column of that row.
If a customer''s bill isn''t past due, I display a blue circle in the
last column of that row.
Simple, right?
These little colorful circles can be from a database table or from an
ArrayList.
I''ve tried a template field in the last column and then bind the
ImageUrl of the Image Control to a method I have in the code-behind,
like so:
<asp:Image ... ImageUrl=''<%# GetIconPath() %>'' ....></asp:Image>
It did not work.
I removed the Image control and simply tried:
<img src=''GetIconPath()'' />
And it still did not work.
Then, I tried using a Label control and in the code behind I say
lblImageURL.Text = "<img src=''" + GetIconPath() + "''/>";
It still didn''t work.
Then, I created another page GetIconPath.aspx, which simply outputs
the path of the icon as a string like "~/Images/red_cirlce.jpg", and
in the Image control, I say
<asp:Image .... ImageUrl="GetIconPath.aspx" ... ></asp:Image>
It still refuses to work.
I tried <asp:ImageFieldinstead of <asp:TemplateField>, and it still
refuses to work. I''ve spent the whole day working on this, and cannot
resolve this problem.
Any hint is highly appreciated.For example
<asp:TemplateColumn>
<ItemTemplate>
<%#"<img src=''" + GetIconPath() + "''>"%>
</ItemTemplate>
</asp:TemplateColumn>
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