[英]How to create a CSV file from a XML file
我是C#的新手。 在我的项目中,我需要创建一个csv文件,该文件将从xml数据中获取数据。 现在,我可以从XML获取数据,并在looger中打印以获取来自xml的一些特定属性。 但是我不确定如何将特定属性的数据存储到CSV文件中。
这是我需要创建CSV文件的XML文件。
<?xml version="1.0" encoding="utf-8"?>
<tlp:WorkUnits xmlns:tlp="http://www.timelog.com/XML/Schema/tlp/v4_4"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.timelog.com/XML/Schema/tlp/v4_4 http://www.timelog.com/api/xsd/WorkUnitsRaw.xsd">
<tlp:WorkUnit ID="130">
<tlp:EmployeeID>3</tlp:EmployeeID>
<tlp:AllocationID>114</tlp:AllocationID>
<tlp:TaskID>239</tlp:TaskID>
<tlp:ProjectID>26</tlp:ProjectID>
<tlp:ProjectName>LIK Template</tlp:ProjectName>
<tlp:CustomerId>343</tlp:CustomerId>
<tlp:CustomerName>Lekt Corp Inc.</tlp:CustomerName>
<tlp:IsBillable>1</tlp:IsBillable>
<tlp:ApprovedStatus>0</tlp:ApprovedStatus>
<tlp:LastModifiedBy>AL</tlp:LastModifiedBy>
</tlp:WorkUnit>
我的代码在logger中获取此值。但是我不确定如何创建一个按顺序存储该值的csv文件。
编辑
namespace TimeLog.ApiConsoleApp
{
/// <summary>
/// Template class for consuming the reporting API
/// </summary>
public class ConsumeReportingApi
{
private static readonly ILog Logger = LogManager.GetLogger(typeof(ConsumeReportingApi));
public static void Consume()
{
if (ServiceHandler.Instance.TryAuthenticate())
{
if (Logger.IsInfoEnabled)
{
Logger.Info("Successfully authenticated on reporting API");
}
var customersRaw = ServiceHandler.Instance.Client.GetWorkUnitsRaw(ServiceHandler.Instance.SiteCode,
ServiceHandler.Instance.ApiId,
ServiceHandler.Instance.ApiPassword,
WorkUnit.All,
Employee.All,
Allocation.All,
Task.All,
Project.All,
Department.All,
DateTime.Now.AddDays(-5).ToString(),
DateTime.Now.ToString()
);
if (customersRaw.OwnerDocument != null)
{
var namespaceManager = new XmlNamespaceManager(customersRaw.OwnerDocument.NameTable);
namespaceManager.AddNamespace("tlp", "http://www.timelog.com/XML/Schema/tlp/v4_4");
var workUnit = customersRaw.SelectNodes("tlp:WorkUnit", namespaceManager);
var output = new StringBuilder();
output.AppendLine("AllocationID,ApprovedStatus,CustomerId,CustomerName,EmployeeID");
if (workUnit != null)
{
foreach (XmlNode customer in workUnit)
{
var unit = new WorkUnit();
var childNodes = customer.SelectNodes("./*");
if (childNodes != null)
{
foreach (XmlNode childNode in childNodes)
{
if (childNode.Name == "tlp:EmployeeID")
{
unit.EmployeeID = Int32.Parse(childNode.InnerText);
}
if (childNode.Name == "tlp:EmployeeFirstName")
{
unit.EmployeeFirstName = childNode.InnerText;
}
if (childNode.Name == "tlp:EmployeeLastName")
{
unit.EmployeeLastName = childNode.InnerText;
}
if (childNode.Name == "tlp:AllocationID")
{
unit.AllocationID = Int32.Parse(childNode.InnerText);
}
if (childNode.Name == "tlp:TaskName")
{
unit.TaskName = childNode.InnerText;
}
}
}
output.AppendLine($"{unit.EmployeeID},{unit.EmployeeFirstName},{unit.EmployeeLastName},{unit.AllocationID},{unit.TaskName}");
//Console.WriteLine("---");
}
Console.WriteLine(output.ToString());
File.WriteAllText("c:\\...\\WorkUnits.csv", output.ToString());
}
}
else
{
if (Logger.IsWarnEnabled)
{
Logger.Warn("Failed to authenticate to reporting API");
}
}
}
}
}
}
假设您将XML数据放入List
StringBuilder str = new StringBuilder();
foreach (var fin list.ToList())
{
str.Append(fin.listfield.ToString() + ",");
}
创建新行:
str.Replace(",", Environment.NewLine, str.Length - 1, 1);
保存:
string filename=(DirectoryPat/filename.csv");
File.WriteAllText(Filename, str.ToString());
您想以正确的顺序将列写入CSV(当然),因此您需要以正确的顺序进行处理。 两种选择:
使用要写入CSV的每个列的属性创建一个新类(我们称其为WorkUnit
)。 为XML中的每个<tlp:WorkUnit>
节点创建一个新实例,并在遇到正确的子节点时填充属性。 处理完整个WorkUnit节点后,以正确的顺序写出属性。
var output = new StringBuilder();
foreach (XmlNode customer in workUnit)
{
// fresh instance of the class that holds all columns (so all properties are cleared)
var unit = new WorkUnit();
var childNodes = customer.SelectNodes("./*");
if (childNodes != null)
{
foreach (XmlNode childNode in childNodes)
{
if(childNode.Name== "tlp:EmployeeID")
{
// employeeID node found, now write to the corresponding property:
unit.EmployeeId = childNode.InnerText;
}
// etc for the other XML nodes you are interested in
}
// all nodes have been processed for this one WorkUnit node
// so write a line to the CSV
output.AppendLine($"{unit.EmployeeId},{unit.AllocationId}, etc");
}
不必使用foreach
以任何出现的顺序遍历所有子节点,而是以所需的顺序搜索特定的子节点。 然后,您可以按相同顺序写出CSV。 请注意,即使找不到子节点,仍然需要写出分隔符。
var output = new StringBuilder();
foreach (XmlNode customer in workUnit)
{
// search for value for first column (EmployeeID)
var node = workUnit.SelectSingleNode("tlp:EmployeeID");
if (node != null)
{
output.Append(node.InnerText).Append(',');
}
else
{
output.Append(','); // no content, but we still need a separator
}
// etc for the other columns
当然要注意包含分隔符的字符串值。
尝试这个:
var output = new StringBuilder();
output.AppendLine("AllocationID,ApprovedStatus,CustomerId,CustomerName,EmployeeID");
if (workUnit != null)
{
foreach (XmlNode customer in workUnit)
{
var unit = new WorkUnit();
var childNodes = customer.SelectNodes("./*");
if (childNodes != null)
{
for (int i = 0; i<childNodes.Count; ++i)
{
XmlNode childNode = childNodes[i];
if (childNode.Name == "tlp:EmployeeID")
{
unit.EmployeeID = Int32.Parse(childNode.InnerText);
}
if (childNode.Name == "tlp:EmployeeFirstName")
{
unit.EmployeeFirstName = childNode.InnerText;
}
if (childNode.Name == "tlp:EmployeeLastName")
{
unit.EmployeeLastName = childNode.InnerText;
}
if (childNode.Name == "tlp:AllocationID")
{
unit.AllocationID = Int32.Parse(childNode.InnerText);
}
if (childNode.Name == "tlp:TaskName")
{
unit.TaskName = childNode.InnerText;
}
output.Append(childNode.InnerText);
if (i<childNodes.Count - 1)
output.Append(",");
}
output.Append(Environment.NewLine);
}
}
Console.WriteLine(output.ToString());
File.WriteAllText("c:\\Users\\mnowshin\\projects\\WorkUnits.csv", output.ToString());
}
您可以使用以下顺序:
一种。 反序列化(即从XML转换为C#对象)您的XML。
b。 编写一个简单的循环以将数据写入文件。
此序列的优点:
解决方案
一种。 反序列化:
使用反序列化代码。
var workUnitsNode = customersRaw.SelectSingleNode("tlp:WorkUnits", namespaceManager); XmlSerializer ser = new XmlSerializer(typeof(WorkUnits)); WorkUnits workUnits = (WorkUnits)ser.Deserialize(workUnitsNode);
b。 写入csv文件
StringBuilder csvContent = new StringBuilder(); // add the header line csvContent.AppendLine("AllocationID,ApprovedStatus,CustomerId,CustomerName,EmployeeID"); foreach (var unit in workUnits.WorkUnit) { csvContent.AppendFormat( "{0}, {1}, {2}, {3}, {4}", new object[] { unit.AllocationID, unit.ApprovedStatus, unit.CustomerId, unit.CustomerName, unit.EmployeeID // you get the idea }); csvContent.AppendLine(); } File.WriteAllText(@"G:\\Projects\\StackOverFlow\\WpfApp1\\WorkUnits.csv", csvContent.ToString());
您可以使用Cinchoo ETL-如果您有使用开放源代码库的空间
using (var csvWriter = new ChoCSVWriter("sample1.csv").WithFirstLineHeader())
{
using (var xmlReader = new ChoXmlReader("sample1.xml"))
csvWriter.Write(xmlReader);
}
输出:
ID,tlp_EmployeeID,tlp_AllocationID,tlp_TaskID,tlp_ProjectID,tlp_ProjectName,tlp_CustomerId,tlp_CustomerName,tlp_IsBillable,tlp_ApprovedStatus,tlp_LastModifiedBy
130,3,114,239,26,LIK Template,343,Lekt Corp Inc.,1,0,AL
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