通过Ajax级联下拉列表将querystring传递到Web服务. [英] Passing querystring to webservice through Ajax cascading dropdown.

问题描述

任何人都可以告诉我如何从Web服务中的查询字符串中获取值.

解决方案

 <     ="  > ddlCollegeNameCascadingDropDown"    运行  ="    类别  ="   TargetControlID       LoadingText   正在加载区域中心..."  PromptText   -选择区域中心-"    PromptValue   ="     ServiceMethod   ="  BindRCdropdown"  ServicePath   ="  >>  <  /ajaxToolkit:CascadingDropDown  >>  

在后面的代码中使用ServiceMethod="BindRCdropdown"而不是像
这样的apx页面

 ddlCollegeNameCascadingDropDown.ServiceMethod = "  + Request.QueryString [" ]; 

在网络服务呼叫中获取您的QueryString

 strUGPG = HttpContext.Current.Request.QueryString [" ] .ToString().Trim();

谢谢

看看这个stackoverflow问题，它解释了您需要做什么，(Scott Anderson的回答)

http://stackoverflow.com/questions/2006828/possible-to-invoke-asmx-service-with-parameter-via-url-query-string [ http://www.techbubbles.com/wcf/wcf-and-rest/ [ ^ ]

Can any one tell me how can i get value from query string in web service.

解决方案

<ajaxToolkit:CascadingDropDown ID="ddlCollegeNameCascadingDropDown" runat="server" Category="RC" TargetControlID="ddlRC" LoadingText="Loading Regional Center..." PromptText="--Select Regional Center--" PromptValue="0" ServiceMethod="BindRCdropdown" ServicePath="../WebService/DropdownWebService.asmx"></ajaxToolkit:CascadingDropDown>

use ServiceMethod="BindRCdropdown" in code behind rather than apx page like

ddlCollegeNameCascadingDropDown.ServiceMethod = "BindCollegedropdown?CRS=" + Request.QueryString["CRS"];

in web service call to get your QueryString

strUGPG= HttpContext.Current.Request.QueryString["CRS"].ToString().Trim();

Thanks

Have a look at this stackoverflow question that explains what you need to do, (answer by Scott Anderson)

http://stackoverflow.com/questions/2006828/possible-to-invoke-asmx-service-with-parameter-via-url-query-string[^]

If you *really* need to allow HttpGet to your webservice, then you will be able to access the query string as in the example.

However, this does violate the pattern somewhat, if you need to allow HttpGet then consider creating a REST service, as per the accepted answer on that link

http://www.techbubbles.com/wcf/wcf-and-rest/[^]

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