前台代码:html
<%@ Page language="c#" Codebehind="CodeUse.aspx.cs" AutoEventWireup="false" Inherits="DsAndXML.CodeUse" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<KOPF>
<title>CodeUse</title>
<meta content="Microsoft Visual Studio 7.0" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content=" http://schemas.microsoft.com/intellisense/ie5 " name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="CodeUse" method="post" runat="server">
<FONT face="宋体">
<asp:button id="btnCreate" style="Z-INDEX: 100; LEFT: 31px; POSITION: absolut; TOP: 43px" runat="server" Height="36" Width="130" Text="创建数据集和数据表></asp:button>
<asp:Button id="btnUpdateDs" style="Z-INDEX: 117; LEFT: 35px; POSITION: absolut; TOP: 439px" runat="server" Height="36px" Width="131px" Text="赋值" ></asp:Button>
<asp:Label id="Label3" style="Z-INDEX: 112; LINKS: 352px; POSITION: absolut; TOP: 395px" runat="server">Anzeige:</asp:Label>
<asp:Label id="Label2" style="Z-INDEX: 111; LINKS: 209px; POSITION: absolut; TOP: 395px" runat="server">Anzeige:</asp:Label>
<asp:Button id="btnUpdateMID" style="Z-INDEX: 107; LEFT: 37px; POSITION: absolut; TOP: 330px" runat="server" Height="36" Width="131" Text="修改MasterID "></asp:Button>
<asp:Button id="btnAddForeign" style="Z-INDEX: 106; LEFT: 35px; POSITION: absolut; TOP: 278px" runat="server" Height="36" width="131" Text="添加外键"></asp:Button>
<asp:Button id="Button1" style="Z-INDEX: 105; LINKS: 31px; POSITION: absolut; TOP: 217px" runat="server" Höhe="36px" Breite="130px" Text="添加唯一键"></asp:Button><asp:button id="btnAddRow" style="Z-INDEX: 102; POSITION: absolute; top: 161px" runat="server" Height="36px" ="130px" Text="Anzeige"></asp:button><asp:button id="btnAddColumn" style="Z-INDEX: 101; LEFT: 31px; POSITION: absolut; TOP: 102px" runat=" server" Height="36px" width="130px" Text="添加列"></asp:button><asp:datagrid id="dgMaster" style="Z-INDEX: 103; LEFT: 242px; POSITION: absolut ; TOP: 40px" runat="server" Height="120px" width="485px"></asp:datagrid><asp:datagrid id="dgChild" style="Z-INDEX: 104; LEFT: 240px; : absolut; TOP: 193px" runat="server" Height="111px" Width="479px"></asp:datagrid>
<asp:TextBox id="tbRow" style="Z-INDEX: 108; LINKS: 275px; POSITION: absolut; OBEN: 395px" runat="server" Breite="54px"></asp:TextBox>
<asp:TextBox id="tbCol" style="Z-INDEX: 109; LINKS: 422px; POSITION: absolut; OBEN: 395px" runat="server" Breite="64px"></asp:TextBox>
<asp:Label id="Label1" style="Z-INDEX: 110; LEFT: 520px; POSITION: absolut; TOP: 399px" runat="server">值：</asp:Label>
<asp:TextBox id="tbResult" style="Z-INDEX: 113; LINKS: 585px; POSITION: absolut; OBEN: 394px" runat="server" Breite="145px"></asp:TextBox>
<asp:Label id="Label4" style="Z-INDEX: 114; LINKS: 209px; POSITION: absolut; TOP: 344px" runat="server">Beschreibung:</asp:Label>
<asp:DropDownList id="ddlTable" style="Z-INDEX: 115; LEFT: 277px; POSITION: absolut; TOP: 341px" runat="server">
<asp:ListItem Value="0">Zurück</asp:ListItem>
<asp:ListItem Value="1">Zurück</asp:ListItem>
</asp:DropDownList>
<asp:Button id="Button2" style="Z-INDEX: 116; LINKS: 35px; POSITION: absolut; TOP: 389px" runat="server" Höhe="36px" Breite="131px" Text="求值"></asp:Button></FONT></form>
</body>
</HTML>
后台代码:cs
Verwenden des Systems;
Verwenden von System.Collections;
mit System.ComponentModel;
Verwenden von System.Data;
Verwenden von System.Drawing;
mit System.Web;
using System.Web.SessionState;
mit System.Web.UI;
mit System.Web.UI.WebControls;
mit System.Web.UI.HtmlControls;
Namespace DsAndXML
{
/**//// <Zusammenfassung>
/// CodeUse-Code verwenden.
/// </summary>
öffentliche Klasse CodeUse: System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button btnAddColumn;
protected System.Web.UI.WebControls.Button btnAddRow;
protected System.Web.UI.WebControls.DataGrid dgMaster;
protected System.Web.UI.WebControls.DataGrid dgChild;
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Button btnAddForeign;
protected System.Web.UI.WebControls.Button btnUpdateMID;
protected System.Web.UI.WebControls.TextBox tbRow;
protected System.Web.UI.WebControls.TextBox tbCol;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.Label Label3;
protected System.Web.UI.WebControls.TextBox tbResult;
protected System.Web.UI.WebControls.Label Label4;
protected System.Web.UI.WebControls.DropDownList ddlTable;
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.WebControls.Button btnUpdateDs;
protected System.Web.UI.WebControls.Button btnCreate;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
}
Vom Web Form Designer generierter Code#region Vom Web Form Designer generierter Code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: Die ASP.NET Web-App ist eine neue Version von ASP.NET Web.
//
InitializeComponent();
base.OnInit(e);
}
/**//// <Zusammenfassung>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容.
/// </summary>
private void InitializeComponent()
{
this.btnCreate.Click += new System.EventHandler(this.btnCreate_Click);
this.btnAddRow.Click += new System.EventHandler(this.btnAddRow_Click);
this.btnAddColumn.Click += new System.EventHandler(this.btnAddColumn_Click);
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.btnAddForeign.Click += new System.EventHandler(this.btnAddForeign_Click);
this.btnUpdateMID.Click += new System.EventHandler(this.btnUpdateMID_Click);
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.btnUpdateDs.Click += new System.EventHandler(this.btnUpdateDs_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void btnCreate_Click(object sender, System.EventArgs e)
{
DataSet dsUntyped = new DataSet("myDS");//创建数据集
DataTable dtMaster = new DataTable("Master");//创建数据表
DataTable dtChild = new DataTable("Child");
dsUntyped.Tables.Add(dtMaster);//Erweiterte Informationen
dsUntyped.Tables.Add(dtChild);
Session["ds"] = dsUntyped;
}
private void btnAddColumn_Click(object sender, System.EventArgs e)
{
DataSet dsUntyped = (DataSet)Session["ds"];
dsUntyped.Tables["Master"].Columns.Add("MasterID",typeof(int));
dsUntyped.Tables["Master"].Columns.Add("MasterValue",typeof(string));
dsUntyped.Tables["Child"].Columns.Add("MasterLink",typeof(int));
dsUntyped.Tables["Child"].Columns.Add("ChildID",typeof(int));
dsUntyped.Tables["Child"].Columns .Add("ChildValue",typeof(string));
//修改表头
dsUntyped.Tables["Master"].Columns["MasterID"].Caption = "主ID";
dsUntyped.Tables["Master"].Columns["MasterValue"].Caption = "值";
Session["ds"] = dsUntyped;
Binden();
}
private void btnAddRow_Click(object sender, System.EventArgs e)
{
versuchen
{
DataSet dsUntyped = (DataSet)Session["ds"];
//为Master表添加两行
DataRow dr = dsUntyped.Tables["Master"].NewRow();
dr["MasterID"] = 1;
dr["MasterValue"] = "Eins";
dsUntyped.Tables["Master"].Rows.Add(dr);
dr = dsUntyped.Tables["Master"].NewRow();
dr["MasterID"] = 2;
dr["MasterValue"] = "Zwei";
dsUntyped.Tables["Master"].Rows.Add(dr);
//为child表添加1行
dr = dsUntyped.Tables["Child"].NewRow();
dr["MasterLink"] = 1;
dr["ChildID"] = 1;
dr["ChildValue"] = "ChildOne";
dsUntyped.Tables["Child"].Rows.Add(dr);
Session["ds"] = dsUntyped;
Binden();
}
Catch (Ausnahme ee)
{
Response.Write(ee.Message);
}
}
//添加唯一键
private void Button1_Click(object sender, System.EventArgs e)
{
DataSet dsUntyped = (DataSet)Session["ds"];
System.Data.UniqueConstraint uc = new UniqueConstraint("unqi",dsUntyped.Tables["Master"].Columns["MasterID"]);
dsUntyped.Tables["Master"].Constraints.Add(uc);
Session["ds"] = dsUntyped;
}
private void Bind()
{
DataSet dsUntyped = (DataSet)Session["ds"];
dgMaster.DataSource = dsUntyped.Tables["Master"].DefaultView;
dgChild.DataSource = dsUntyped.Tables["Child"].DefaultView;
this.DataBind();
}
private void btnAddForeign_Click(object sender, System.EventArgs e)
{
DataSet dsUntyped = (DataSet)Session["ds"];
System.Data.ForeignKeyConstraint fc = new ForeignKeyConstraint("fc",dsUntyped.Tables["Master"].Columns["MasterID"],dsUntyped.Tables["Child"].Columns["MasterLink"]);
dsUntyped.Tables["Child"].Constraints.Add(fc);
Session["ds"] = dsUntyped;
}
private void btnUpdateMID_Click(object sender, System.EventArgs e)
{
DataSet dsUntyped = (DataSet)Session["ds"];
dsUntyped.Tables["Master"].Rows[0]["MasterID"] = 4;
Binden();
}
private void Button2_Click(object sender, System.EventArgs e)
{
DataSet dsUntyped = (DataSet)Session["ds"];
int nIndexTb = int.Parse(ddlTable.SelectedItem.Value);
int nIndexRow = int.Parse(tbRow.Text);
int nIndexCol = int.Parse(tbCol.Text);
object obj = dsUntyped.Tables[nIndexTb].Rows[nIndexRow][nIndexCol];
tbResult.Text = obj.ToString();
}
private void btnUpdateDs_Click(object sender, System.EventArgs e)
{
DataSet dsUntyped = (DataSet)Session["ds"];
int nIndexTb = int.Parse(ddlTable.SelectedItem.Value);
int nIndexRow = int.Parse(tbRow.Text);
int nIndexCol = int.Parse(tbCol.Text);
dsUntyped.Tables[nIndexTb].Rows[nIndexRow][nIndexCol] = tbResult.Text;
Session["ds"] = dsUntyped;
Binden();
}
}
Die Funktion „DataSet“ von „GetXml()“ ist die Funktion „DataSet“ und „GetXml()“.
DataSet ds = db.ExecSqlForDataSet( strSQL );
string strDS = ds.GetXml();
//如何把strDS转换成DataSet对象??
-------------------------------------------------- ---------------
String strDS = ""
System.IO.StringReader reader = new System.IO.StringReader(strDS);
ds.ReadXml(reader);
Reader.Close();
http://www.cnblogs.com/skylaugh/archive/2006/12/18/595646.html