typeof ( int )); dsUntyped.Tables[ " Master " ].Columns.Add( " MasterValue " ， 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 " ]; System.Data.ForeignKeyConstraint fc = new ForeignKeyConstraint( " fc " ， // InitializeComponent(); base .OnInit(e); } /**/ /// summary /// 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 public class 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， typeof ( string )); // 修改表头 dsUntyped.Tables[ " Master " ].Columns[ " MasterID " ].Caption = " 主ID " ; dsUntyped.Tables[ " Master " ].Columns[ " MasterValue " ].Caption = " 值 " ; Session[ " ds " ] = dsUntyped; Bind(); } private void btnAddRow_Click( object sender。

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， typeof ( int )); dsUntyped.Tables[ " Child " ].Columns .Add( " ChildValue " ， 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; Bind(); } } } 如何把利用DataSet的GetXml()方法获得的字符串再转成DataSet对象 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(); ， /// /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， typeof ( string )); dsUntyped.Tables[ " Child " ].Columns.Add( " MasterLink " 。

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 = 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); // 把数据表添加到数据集中 dsUntyped.Tables.Add(dtChild); Session[ " ds " ] = dsUntyped; } private void btnAddColumn_Click( object sender， System.EventArgs e) { try { DataSet dsUntyped = (DataSet)Session[ " ds " ]; // 为Master表添加两行 DataRow dr = dsUntyped.Tables[ " Master " ].NewRow(); dr[ " MasterID " ] = 1 ; dr[ " MasterValue " ] = " One " ; dsUntyped.Tables[ " Master " ].Rows.Add(dr); dr = dsUntyped.Tables[ " Master " ].NewRow(); dr[ " MasterID " ] = 2 ; dr[ " MasterValue " ] = " Two " ; 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; Bind(); } catch (Exception ee) { Response.Write(ee.Message); } } // 添加唯一键 private void Button1_Click( object sender， System.EventArgs e) { DataSet dsUntyped = (DataSet)Session[ " ds " ]; dsUntyped.Tables[ " Master " ].Columns.Add( " MasterID " ， System.EventArgs e) { // 在此处放置用户代码以初始化页面 } Web Form Designer generated code #region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的， System.EventArgs e) { DataSet dsUntyped = (DataSet)Session[ " ds " ]; System.Data.UniqueConstraint uc = new UniqueConstraint( " unqi " ，dsUntyped.Tables[ " Master " ].Columns[ " MasterID " ]， typeof ( int )); dsUntyped.Tables[ " Child " ].Columns.Add( " ChildID " ， System.EventArgs e) { DataSet dsUntyped = (DataSet)Session[ " ds " ]; dsUntyped.Tables[ " Master " ].Rows[ 0 ][ " MasterID " ] = 4 ; Bind(); } private void Button2_Click( object sender， % @ Page language = " c# " Codebehind = " CodeUse.aspx.cs " AutoEventWireup = " false " Inherits = " DsAndXML.CodeUse " % ! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" HTML HEAD 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: absolute; 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: absolute; TOP: 439px" runat ="server" Height ="36px" Width ="131px" Text ="赋值" / asp:Button asp:Label id ="Label3" style ="Z-INDEX: 112; LEFT: 352px; POSITION: absolute; TOP: 395px" runat ="server" 列号: / asp:Label asp:Label id ="Label2" style ="Z-INDEX: 111; LEFT: 209px; POSITION: absolute; TOP: 395px" runat ="server" 行号： / asp:Label asp:Button id ="btnUpdateMID" style ="Z-INDEX: 107; LEFT: 37px; POSITION: absolute; 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: absolute; TOP: 278px" runat ="server" Height ="36" Width ="131" Text ="添加外键" / asp:Button asp:Button id ="Button1" style ="Z-INDEX: 105; LEFT: 31px; POSITION: absolute; TOP: 217px" runat ="server" Height ="36px" Width ="130px" Text ="添加唯一键" / asp:Button asp:button id ="btnAddRow" style ="Z-INDEX: 102; LEFT: 31px; POSITION: absolute; TOP: 161px" runat ="server" Height ="36px" Width ="130px" Text ="添加行" / asp:button asp:button id ="btnAddColumn" style ="Z-INDEX: 101; LEFT: 31px; POSITION: absolute; 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: absolute; TOP: 40px" runat ="server" Height ="120px" Width ="485px" / asp:datagrid asp:datagrid id ="dgChild" style ="Z-INDEX: 104; LEFT: 240px; POSITION: absolute; TOP: 193px" runat ="server" Height ="111px" Width ="479px" / asp:datagrid asp:TextBox id ="tbRow" style ="Z-INDEX: 108; LEFT: 275px; POSITION: absolute; TOP: 395px" runat ="server" Width ="54px" / asp:TextBox asp:TextBox id ="tbCol" style ="Z-INDEX: 109; LEFT: 422px; POSITION: absolute; TOP: 395px" runat ="server" Width ="64px" / asp:TextBox asp:Label id ="Label1" style ="Z-INDEX: 110; LEFT: 520px; POSITION: absolute; TOP: 399px" runat ="server" 值： / asp:Label asp:TextBox id ="tbResult" style ="Z-INDEX: 113; LEFT: 585px; POSITION: absolute; TOP: 394px" runat ="server" Width ="145px" / asp:TextBox asp:Label id ="Label4" style ="Z-INDEX: 114; LEFT: 209px; POSITION: absolute; TOP: 344px" runat ="server" 表： / asp:Label asp:DropDownList id ="ddlTable" style ="Z-INDEX: 115; LEFT: 277px; POSITION: absolute; TOP: 341px" runat ="server" asp:ListItem Value ="0" 表一 / asp:ListItem asp:ListItem Value ="1" 表二 / asp:ListItem / asp:DropDownList asp:Button id ="Button2" style ="Z-INDEX: 116; LEFT: 35px; POSITION: absolute; TOP: 389px" runat ="server" Height ="36px" Width ="131px" Text ="求值" / asp:Button / FONT / form / body / HTML 后台代码：cs using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; namespace DsAndXML { /**/ /// summary /// CodeUse 的摘要说明，。