如何在asp.net c中将URL转换为图像＃ [英] how to convert URL to image in asp.net c#
问题描述
HI，我需要开发基于Web的系统，这是我的项目文件的Web应用程序。因为它我必须将URL转换为网站中的图像。也就是说，首先我必须在文本框中插入URL，然后单击浏览按钮。点击后，它必须显示URL的图像。我需要这个代码。我找不到任何要转换的代码。请帮我。我在VS 2010终极中使用asp.net c＃。
URL是文件的地址，无论是本地（您的网络服务器）还是远程（某些人）网络服务器）。 URL指向图像，与文件路径和文件名指向硬盘驱动器上的文件的方式相同。该URL允许您的Web应用程序在网页上显示图像。
例如：
远程图片：
< div >
< img src = http：// someremotewebsite。 com / images / remoteImage.jpg alt = 如果图像未显示，则显示备用文本 / >
< / div >
本地映像（假设使用.NET Framework）：
< div >
< img src = < span class =code-keyword>〜/ images / localImage.jpg alt = 备用文字，以防您的图片无法显示 >
< / img > < / div >
你可以像这样创建....
< html xmlns = http://www.w3.org/1999/xhtml >
< head runat = 服务器 >
< title > < / title >
< /头 >
< body >
< 表单 id = < span class =code-keyword> form1 runat = server >
< div >
< asp： script manager id = ScriptManager runat = 服务器 >
< / asp： script manager > ;
< asp：updatepanel id = UpdatePanel runat = server >
< contenttemplate >
< 表格 >
< tr >
< td >
< asp：textbox id = txtImgUrl runat = 服务器 > < / asp：textbox >
< / td >
< td >
< asp：按钮 id = btnShow runat = server text = 显示 onclick = btnShow_Click / >
< / td >
< / tr >
< tr >
< td >
< asp：label id = lblMessage runat = server 可见 = false > < / asp：label >
< / td >
< / tr >
< / table >
< br / >
< div >
< asp：image id = imgView runat < span class =code-keyword> = server alternatetext = Image Goes Here visible = false / >
< / div >
< / contenttemplate >
< / asp：updatepanel >
< / div >
< / form &g t;
< / body >
< / html >
和背后的代码如...
protected void btnShow_Click（ object sender，EventArgs e）
{
if （！string.IsNullOrEmpty（txtImgUrl.Text） ）
{
imgView.ImageUrl = txtImgUrl.Text;
imgView.Visible = true ;
}
else
{
lblMessage.Visible = true ;
lblMessage.Text = 请将网址添加到文本框;
}
}
并使用像这样的图片网址...
https://www.google.co.in/images/srpr/ logo11w.png [ ^ ]
HI, i need to develop web based system that are web application for my project paper. for it i have to convert URL to image in website. That are, firstly i must insert URL in textbox then click browse button. Once click it have to show the images of the URL. Please i need code for this. i could not find any code to convert. Please help me. Im using asp.net c# in VS 2010 ultimate.
A URL is an address to a file, whether it is local (your webserver) or remote (someone elses webserver). A URL "points" to an image, in the same way that a file path and file name points to a file on your hard drive. The URL allows your web application to display the image on a web page.
For example:
Remote image: <div> <img src="http://someremotewebsite.com/images/remoteImage.jpg" alt="Alternate text in case your image does not display" /> </div> Local image (assumes using .NET Framework) : <div> <img src="~/images/localImage.jpg" alt="Alternate text in case your image does not display"> </img></div>
you can create like this....
<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:scriptmanager id="ScriptManager" runat="server"> </asp:scriptmanager> <asp:updatepanel id="UpdatePanel" runat="server"> <contenttemplate> <table> <tr> <td> <asp:textbox id="txtImgUrl" runat="server"></asp:textbox> </td> <td> <asp:button id="btnShow" runat="server" text="Show" onclick="btnShow_Click" /> </td> </tr> <tr> <td> <asp:label id="lblMessage" runat="server" visible="false"></asp:label> </td> </tr> </table> <br /> <div> <asp:image id="imgView" runat="server" alternatetext="Image Goes Here" visible="false" /> </div> </contenttemplate> </asp:updatepanel> </div> </form> </body> </html>
and code behind like...
protected void btnShow_Click(object sender, EventArgs e) { if (!string.IsNullOrEmpty(txtImgUrl.Text)) { imgView.ImageUrl = txtImgUrl.Text; imgView.Visible = true; } else { lblMessage.Visible = true; lblMessage.Text = "Please add Url to text box"; } }
and use image url like this...
https://www.google.co.in/images/srpr/logo11w.png[^]
这篇关于如何在asp.net c中将URL转换为图像＃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
![https://www.google.co.in/images/srpr/ logo11w.png](\"https://www.google.co.in/images/srpr/logo11w.png\"){kind=link}
