如何在WCF服务中读取XML文件？ [英] How to read XML File in a WCF Service ?

问题描述

Hello Friends，

我有这个WCF服务，我需要读取XML文件中的一些数据&然后我需要将该数据作为字符串返回给客户端。

但我在WCF服务项目中读取XML文件时遇到问题。



这是我用来阅读和阅读的代码。返回值：



IProduct.cs

Hello Friends,
I've this WCF Service where I need to Read Some data from an XML file & then I need to return that data to Client as string.
But I'm facing problem to Read the XML File in WCF Service Project.

Here is the code I used to Read & return the values:

IProduct.cs

[ServiceContract]
public interface IProduct
{
    [OperationContract]
    string GetID(int rno);

    [OperationContract]
    string GetName(int rno);

    [OperationContract]
    string GetDesc(int rno);

}

Product.cs

Product.cs

public class Product : IProduct
{

    public string GetID(int rno)
    {
        DataSet ds = new DataSet();
        try
        {
            ds.ReadXml("~/Products.xml");
            string res = ds.Tables[0].Rows[rno][0].ToString();
            return res;
        }
        catch
        {
            return "No More Data";
        }
    }

    public string GetName(int rno)
    {
        DataSet ds = new DataSet();
        try
        {
            ds.ReadXml("Products.xml");
            string res = ds.Tables[0].Rows[rno][0].ToString();
            return res;
        }
        catch
        {
            return "No More Data";
        }
    }

    public string GetDesc(int rno)
    {
        DataSet ds = new DataSet();
        try
        {
            ds.ReadXml("Products.xml");
            string res = ds.Tables[0].Rows[rno][0].ToString();
            return res;
        }
        catch
        {
            return "No More Data";
        }
    }
}

现在好友plz建议我如何阅读此XML文件&安培;将数据返回给客户？



先谢谢。

问候，

Dash

Now Friends plz Suggest me how can I read this XML File & return the data to Client ?

Thanks in Advance.
Regards,
Dash

推荐答案

感谢分享！



而不是c：\硬编码路径，在WCF服务中，您可以保存产品。 App_Data文件夹中的xml。



您可以通过System.Web.Hosting和System.IO命名空间参考尝试以下代码。



string filePath = Path.Combine（HostingEnvironment.ApplicationPhysicalPath，App_Data，Products.xml）;

ds.ReadXml（filePath）;



谢谢！

Thanks for sharing!

Instead of c:\ hardcoded path, in WCF service, you can save product.xml in App_Data folder.

You can try below code by System.Web.Hosting and System.IO namespace references.

string filePath = Path.Combine(HostingEnvironment.ApplicationPhysicalPath, "App_Data", "Products.xml");
ds.ReadXml(filePath);

Thank you!

除非你指明问题是什么，或者它返回了什么错误，否则很难说。我建议你在每个'ds.ReadXml（Products.xml）'行上放一个断点，找出它返回到DataSet中的数据（如果有的话）。这将使你（和我们）更好地了解问题所在。

Unless you specify what the problem is, or what errors it's returning, it's hard to tell. I suggest you put a breakpoint on each of your 'ds.ReadXml("Products.xml")' lines to find out what data it returns into the DataSet (if any). This will give both you (and us) a much better idea of where the problem lies.

Well Guys我自己找到了解决方案。

之前我已经映射了xml文件路径，就像我以前在aspx页面中做的那样。

但是WCF服务没有走绝对路径。

所以我刚刚更换了

Well Guys I found the Solution myself.
Previously I mapped the xml file path as I used to do in aspx pages.
But WCF Service doesn't take absolute path.
So I just replaced

ds.ReadXml("~/Products.xml");

with

with

ds.ReadXml(@"C:\Products.xml");

和它工作。



问候，

Gittu

and It worked.

Regards,
Gittu

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