Kevin's Tech Space: Nov 11, 2008

this is a sample about how to create webservice dynamicly. But at first, you must create a webservice on your local machine,
such as:http://localhost:2704/TestWebService/Service.asmx
OK, let's go !

code for default.aspx

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Dynamic Web Service Sample</title>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td>WebService URL</td>
<td><asp:TextBox ID="wurl" runat="server">http://localhost:2704/TestWebService/Service.asmx</asp:TextBox></td>
</tr>
<tr>
<td>WebService Name</td>
<td><asp:TextBox ID="wname" runat="server">Service</asp:TextBox></td>
</tr>
<tr>
<td>Method Name</td>
<td><asp:TextBox ID="wmname" runat="server">RevSMS</asp:TextBox></td>
</tr>
<tr>
<td>Method Param0</td>
<td><asp:TextBox ID="wmparam0" runat="server">SYS06*</asp:TextBox></td>
</tr>
<tr>
<td>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /></td>
</tr>
<tr>
<td colspan="4"><asp:TextBox ID="result" runat="server" TextMode="MultiLine" Width="100%" Height="100px"></asp:TextBox></td>
</tr>
</table>

</form>
</body>
</html>

code for default.aspx.cs

public partial class _Default : System.Web.UI.Page
{
DynamicWebService we = new DynamicWebService("http://localhost:2704/TestWebService/Service.asmx", "Service");
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
we = new DynamicWebService("http://localhost:2704/TestWebService/Service.asmx", "Service");
result.Text = we.InvokeMethod("HelloWorld", null).ToString();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(wurl.Text)
&& !string.IsNullOrEmpty(wname.Text)
&& !string.IsNullOrEmpty(wmname.Text))
{
we = new DynamicWebService(wurl.Text, wname.Text);
result.Text = we.InvokeMethod(wmname.Text, string.IsNullOrEmpty(wmparam0.Text) ? null : new object[] { wmparam0.Text }).ToString();
}
}
}

code for DynamicWebService.cs

using System.Net;//for webclient
using System.Reflection;// for assembly
using System.IO;//for Stream
using System.Web.Services.Description;//for servicedescription
using System.CodeDom;//for CodeNameSpace
using System.CodeDom.Compiler;//for CodeDomProvider
/// <summary>
/// Summary description for DynamicWebService
/// </summary>
public class DynamicWebService
{
public DynamicWebService()
{
//
// TODO: Add constructor logic here
//
}

Assembly service = null;
string _url;
string _name;

public string ServiceURL
{
get
{
if (!_url.ToUpper().EndsWith("?WSDL"))
{
_url += "?WSDL";
}
return _url;
}
}

public string ServiceClassName
{
get { return _name; }
}

public DynamicWebService(string serviceURL,string serviceClassName)
{
_url = serviceURL;
_name = serviceClassName;
GetService();
}

public void GetService()
{
// 1. 使用 WebClient 下载 WSDL 信息。
WebClient web = new WebClient();
Stream stream = web.OpenRead(ServiceURL);

// 2. 创建和格式化 WSDL 文档。
ServiceDescription description = ServiceDescription.Read(stream);

// 3. 创建客户端代理代理类。
ServiceDescriptionImporter importer = new ServiceDescriptionImporter();
importer.ProtocolName = "Soap";// 指定访问协议。
importer.Style = ServiceDescriptionImportStyle.Client;// 生成客户端代理。
importer.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties | System.Xml.Serialization.CodeGenerationOptions.GenerateNewAsync;
importer.AddServiceDescription(description, null, null);// 添加 WSDL 文档。

// 4. 使用 CodeDom 编译客户端代理类。
CodeNamespace nmspace = new CodeNamespace();// 为代理类添加命名空间，缺省为全局空间。
CodeCompileUnit unit = new CodeCompileUnit();
unit.Namespaces.Add(nmspace);

ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit);
CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp");

CompilerParameters parameter = new CompilerParameters();
parameter.GenerateExecutable = false;
parameter.GenerateInMemory = true;
parameter.ReferencedAssemblies.Add("System.dll");
parameter.ReferencedAssemblies.Add("System.XML.dll");
parameter.ReferencedAssemblies.Add("System.Web.Services.dll");
parameter.ReferencedAssemblies.Add("System.Data.dll");

CompilerResults result = provider.CompileAssemblyFromDom(parameter,unit);

if (!result.Errors.HasErrors)
{
service = result.CompiledAssembly;
}
else
{
throw new Exception("WebService have errors. ");
}
}

public object InvokeMethod(string MethodName,object[] parameters)
{
// 如果在前面为代理类添加了命名空间，此处需要将命名空间添加到类型前面。
System.Type t = service.GetType(ServiceClassName);

object o = Activator.CreateInstance(t);
MethodInfo method = t.GetMethod(MethodName);
return method.Invoke(o, parameters);
}
}

I read a blog about how to create a calendar, it's simple, but i still want to past it on my blog. OK, Let's go !

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Response.Write(DateTime.Now.Year+" . "+ DateTime.Now.Month);
CreateCalendar(DateTime.Now.Year, DateTime.Now.Month);
}
}

private void CreateCalendar(int year, int month)
{
int days = DateTime.DaysInMonth(year, month);//retrieve the days of month
DateTime dt = new DateTime(year,month,1);
int weeke = Convert.ToInt32(dt.DayOfWeek.ToString("d")); //get the week day of the first day in month
string[,] cal = new string[7,6];//store the date
for (int day = 1; day <= days; day++)
{
int x = (day + weeke - 1) % 7;
int y = (day + weeke - 1) / 7;
for (int j = 0; j < 6; j++)
{
for (int i = 0; i < 7; i++)
{
cal[x, y] = day.ToString();
}
}
}

System.Text.StringBuilder st = new System.Text.StringBuilder();
st.Append("<table cellpadding=\"0\" cellspacing=\"0\" border=\"1\">");
st.Append("<thead><th>星期天</th><th>星期一</th><th>星期二</th><th>星期三</th><th>星期四</th><th>星期五</th><th>星期六</th></thead>");
for (int i = 0; i < 6; i++)
{
st.Append("<tr>");
for (int j = 0; j < 7; j++)
{
st.Append("<td>" + cal[j, i] + "</td>");
}
st.Append("</tr>");
}
st.Append("</table>");
Response.Write(st);
Response.End();
}

}

Tuesday, November 11, 2008

How to Create a dynamic web service

how to create a calendar in C#

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