DataSet 添加數(shù)據(jù)集、行、列、主鍵和外鍵等操作示例
更新時(shí)間：2007年03月07日 00:00:00 作者：
前臺(tái)代碼：html
<%
@ 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="宋體">
<asp:button id="btnCreate" style="Z-INDEX: 100; LEFT: 31px; POSITION: absolute; TOP: 43px" runat="server" Height="36" Width="130" Text="創(chuàng)建數(shù)據(jù)集和數(shù)據(jù)表"></asp:button>
<asp:Button id="btnUpdateDs" style="Z-INDEX: 117; LEFT: 35px; POSITION: absolute; TOP: 439px" runat="server" Height="36px" Width="131px" Text="賦值"></asp:Button>
<asp:Label id="Label3" style="Z-INDEX: 112; LEFT: 352px; POSITION: absolute; TOP: 395px" runat="server">列號(hào):</asp:Label>
<asp:Label id="Label2" style="Z-INDEX: 111; LEFT: 209px; POSITION: absolute; TOP: 395px" runat="server">行號(hào)：</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="添加外鍵"></asp:Button>
<asp:Button id="Button1" style="Z-INDEX: 105; LEFT: 31px; POSITION: absolute; TOP: 217px" runat="server" Height="36px" Width="130px" Text="添加唯一鍵"></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>
后臺(tái)代碼：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 的摘要說明。
/// </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, System.EventArgs e)
{
// 在此處放置用戶代碼以初始化頁面
}
Web Form Designer generated code#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN：該調(diào)用是 ASP.NET Web 窗體設(shè)計(jì)器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/**//// <summary>
/// 設(shè)計(jì)器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內(nèi)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");//創(chuàng)建數(shù)據(jù)集
DataTable dtMaster = new DataTable("Master");//創(chuàng)建數(shù)據(jù)表
DataTable dtChild = new DataTable("Child");
dsUntyped.Tables.Add(dtMaster);//把數(shù)據(jù)表添加到數(shù)據(jù)集中
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));
//修改表頭
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, System.EventArgs e)
{
try
{
DataSet dsUntyped = (DataSet)Session["ds"];
//為Master表添加兩行
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);
//為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);
}
}
//添加唯一鍵
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;
Bind();
}
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;
Bind();
}
}
}
如何把利用DataSet的GetXml()方法獲得的字符串再轉(zhuǎn)成DataSet對(duì)象
DataSet ds = db.ExecSqlForDataSet( strSQL );
string strDS = ds.GetXml();
//如何把strDS轉(zhuǎn)換成DataSet對(duì)象??
--------------------------------------------------------------------------------
String strDS = ""
System.IO.StringReader reader = new System.IO.StringReader(strDS);
ds.ReadXml(reader);
reader.Close();
<%@ 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="宋體"> <asp:button id="btnCreate" style="Z-INDEX: 100; LEFT: 31px; POSITION: absolute; TOP: 43px" runat="server" Height="36" Width="130" Text="創(chuàng)建數(shù)據(jù)集和數(shù)據(jù)表"></asp:button> <asp:Button id="btnUpdateDs" style="Z-INDEX: 117; LEFT: 35px; POSITION: absolute; TOP: 439px" runat="server" Height="36px" Width="131px" Text="賦值"></asp:Button> <asp:Label id="Label3" style="Z-INDEX: 112; LEFT: 352px; POSITION: absolute; TOP: 395px" runat="server">列號(hào):</asp:Label> <asp:Label id="Label2" style="Z-INDEX: 111; LEFT: 209px; POSITION: absolute; TOP: 395px" runat="server">行號(hào)：</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="添加外鍵"></asp:Button> <asp:Button id="Button1" style="Z-INDEX: 105; LEFT: 31px; POSITION: absolute; TOP: 217px" runat="server" Height="36px" Width="130px" Text="添加唯一鍵"></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>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 的摘要說明。 /// </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, System.EventArgs e) { // 在此處放置用戶代碼以初始化頁面 } Web Form Designer generated code#region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN：該調(diào)用是 ASP.NET Web 窗體設(shè)計(jì)器所必需的。 // InitializeComponent(); base.OnInit(e); } /**//// <summary> /// 設(shè)計(jì)器支持所需的方法 - 不要使用代碼編輯器修改 /// 此方法的內(nèi)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");//創(chuàng)建數(shù)據(jù)集 DataTable dtMaster = new DataTable("Master");//創(chuàng)建數(shù)據(jù)表 DataTable dtChild = new DataTable("Child"); dsUntyped.Tables.Add(dtMaster);//把數(shù)據(jù)表添加到數(shù)據(jù)集中 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)); //修改表頭 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, System.EventArgs e) { try { DataSet dsUntyped = (DataSet)Session["ds"]; //為Master表添加兩行 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); //為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); } } //添加唯一鍵 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; Bind(); } 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; Bind(); } }}如何把利用DataSet的GetXml()方法獲得的字符串再轉(zhuǎn)成DataSet對(duì)象 DataSet ds = db.ExecSqlForDataSet( strSQL );string strDS = ds.GetXml();//如何把strDS轉(zhuǎn)換成DataSet對(duì)象??--------------------------------------------------------------------------------String strDS = ""System.IO.StringReader reader = new System.IO.StringReader(strDS);ds.ReadXml(reader);reader.Close();相關(guān)文章
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