Question

我有一个Web应用程序，其中包含一个用于存储用户数据的XML文件。我希望仅在特定用户的网格视图中显示输入的数据，仅基于＆＃39; txtEmpid.Text＆＃39;。我认为问题在于字符串阅读器。但我似乎无法弄清楚我是asp.net的新手，这段代码给了我空白页面。谢谢你的帮助

我的XML文件：

-<SkillSet>

    -<SkillSets>

    <Employee_ID>1</Employee_ID>

    <Employee_Name>abc</Employee_Name>

    <PL_Name>xyz</PL_Name>

    <Skill_Name1>C# with Asp.NET</Skill_Name1>

    <Skill_Type1>Programming</Skill_Type1>

    <Skill_Proficiency1>Beginner</Skill_Proficiency1>

    <Experience1>1</Experience1>

    <Skill_Name2>FL Studio</Skill_Name2>

    <Skill_Type2>Others</Skill_Type2>

    <Skill_Proficiency2>Intermediate</Skill_Proficiency2>

    <Experience2>2</Experience2>

    <Skill_Name3>ms word</Skill_Name3>

    <Skill_Type3>others</Skill_Type3>

    <Skill_Proficiency3>Advance</Skill_Proficiency3>

    <Experience3>3</Experience3>

    <Skill_Name4>Camtasia</Skill_Name4>

    <Skill_Type4>Others</Skill_Type4>

    <Skill_Proficiency4>Professional</Skill_Proficiency4>

    <Experience4>4</Experience4>

    <Skill_Name5>MS excel</Skill_Name5>

    <Skill_Type5>Programming</Skill_Type5>

    <Skill_Proficiency5>Beginner</Skill_Proficiency5>

    <Experience5>5</Experience5>

    <Comments>fgfdgdf</Comments>

    </SkillSets>

    </SkillSet>

这是我的C＃文件，它具有绑定数据的逻辑：

 private void BindGrid()
{
    try {

        var xmlStr = File.ReadAllText(Server.MapPath("~/SkillSet.xml"));
        var str = XElement.Parse(xmlStr);
        var result = str.Elements("SkillSets").
        Where(x => x.Element("Employee_ID").Value.Equals(txtEmpid.Text)).ToList();

        StringReader theReader = new StringReader(result.ToString());

        DataSet ds = new DataSet();
        ds.ReadXml(theReader);
        if (ds != null && ds.HasChanges())
        {
            grdxml.DataSource = ds;
            grdxml.DataBind();

        }
        else
        {

            grdxml.DataBind();

        }
    }

    catch(Exception ex)
    {
        lblerror.Text = ex.ToString();
    }

Answer 1

试试这个：

    string filePath = "Complete path where you saved the XML file";     
    DataSet ds = new DataSet();
    ds.ReadXml(filePath);    
    var skillSets = ds.Tables[0].AsEnumerable();
    var query = from skillset in skillSets
                where skillset.Field<string>("Employee_ID") == "1" // here you can get value from text box etc.
                select skillset;
    grdxml.DataSource = query.ToList();
    grdxml.DataBind();

Answer 2

你的LINQ查询很好。您的代码中存在的问题是：

StringReader theReader = new StringReader(result.ToString());
ds.ReadXml(theReader);

您正在使用result.ToString()，并且XElements列表的ToString()表示无法读取为XML。事实上，调用ToString()将导致此

"System.Collections.Generic.List`1[System.Xml.Linq.XElement]"

正如您所看到的，那不是XML

要使代码正常工作，请尝试以下方法：

 try {

     var xmlStr = File.ReadAllText(Server.MapPath("~/SkillSet.xml"));
     var str = XElement.Parse(xmlStr);
     var result = str.Elements("SkillSets").
     Where(x => x.Element("Employee_ID").Value.Equals(txtEmpid.Text)).ToList();

     grdxml.DataSource = result.ToList();
     grdxml.DataBind();
 }  
 catch(Exception ex)
 {
    lblerror.Text = ex.ToString();
 }

另外，删除XML上的斜杠

在Asp.net中过滤和绑定xml数据到gridview c＃

2 个答案: