DataList之数据操作
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DataList之数据操作
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背景：VisualStudio2005 實現：DataList之數據讀取、編輯、刪改等功能 界面： HTML: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="datalist.aspx.cs" Inherits="datalist" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
??? <title>無標題頁</title>
</head>
<body>
??? <form id="form1" runat="server">
??? <div>
??????? <asp:DataList ID="DataList1" runat="server" Style="position: static;" BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical" Width="345px" OnItemCommand="DataList1_ItemCommand" OnEditCommand="DataList1_EditCommand" OnCancelCommand="DataList1_CancelCommand" OnUpdateCommand="DataList1_UpdateCommand" OnDeleteCommand="DataList1_DeleteCommand">
??????????? <ItemTemplate>
???????????????
??????????????? <asp:LinkButton ID="lBtnShowDetails" runat="server" Style="left: -15px;
??????????????????? position: static; top: 0px" Width="55px" CommandName="select" >Details</asp:LinkButton>
??????????????? <asp:LinkButton ID="lBtnEdit" runat="server" CommandName="edit" Width="31px">Edit</asp:LinkButton>
??????????????? <asp:LinkButton ID="lBtnDelete" runat="server" CommandName="delete" Width="42px" OnClientClick="return confirm( '你確定要刪除嗎?');">Delete </asp:LinkButton><%# DataBinder.Eval(Container.DataItem,"LastName") %><%# DataBinder.Eval(Container.DataItem,"FirstName") %>
??????????? </ItemTemplate>
??????????? <SelectedItemTemplate>
??????????? Name:<%# DataBinder.Eval(Container.DataItem, "LastName")%>
???????????????? <%# DataBinder.Eval(Container.DataItem,"FirstName") %>
???????????????? <br />
??????????? Birth:<%# DataBinder.Eval(Container.DataItem,"BirthDate","{0:D}") %>
???????????????? <br />
??????????? City:<%# DataBinder.Eval(Container.DataItem,"City") %>
???????????????? <br />
??????????? Address:<%# DataBinder.Eval(Container.DataItem,"Address") %>
??????????????? <br />
??????????????? <asp:Button ID="btnExit" runat="server" OnClick="btnExit_Click" Text="Exit" Width="44px" />
??????????? </SelectedItemTemplate>
??????????? <FooterStyle BackColor="#CCCCCC" Font-Bold="True" Font-Italic="False" Font-Overline="False"
??????????????? Font-Strikeout="False" Font-Underline="False" ForeColor="Black" HorizontalAlign="Center" Font-Size="10pt" />
??????????? <SelectedItemStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
??????????? <AlternatingItemStyle BackColor="Gainsboro" Font-Bold="False" Font-Italic="False" Font-Overline="False"
??????????????? Font-Strikeout="False" Font-Underline="False" />
??????????? <ItemStyle BackColor="#EEEEEE" ForeColor="Black" />
??????????? <HeaderTemplate>
??????????????? Employees Information
??????????? </HeaderTemplate>
??????????? <HeaderStyle BackColor="#000084" Font-Bold="True" Font-Italic="False" Font-Overline="False"
??????????????? Font-Strikeout="False" Font-Underline="False" ForeColor="White" HorizontalAlign="Center" />
??????????? <EditItemTemplate>
??????????????? <%# DataBinder.Eval(Container.DataItem,"LastName") %>
??????????????? <%# DataBinder.Eval(Container.DataItem,"FirstName") %>
??????????????? <br />
??????????????? <%# DataBinder.Eval(Container.DataItem,"City") %>
??????????????? <asp:TextBox ID="txtCity" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"City") %>' Width="94px"></asp:TextBox><br />
??????????????? <asp:LinkButton ID="LinkButton2" runat="server" CommandName="update" Width="40px" OnClientClick="return confirm('你確定保存嗎？');">Save</asp:LinkButton>
??????????????? <asp:LinkButton ID="LinkButton1" runat="server" CommandName="cancel">Cancel</asp:LinkButton>
??????????? </EditItemTemplate>
??????? </asp:DataList>
??????? <br />
??????? <table style="width: 345px">
??????????? <tr>
??????????????? <td align="center" style="width: 40px; height: 23px">
??????? <asp:Label ID="Label1" runat="server" Text="Total: " Width="35px"></asp:Label>
??????????????? </td>
??????????????? <td align="center" style="width: 56px; height: 23px">
??????????????????? <asp:Label
??????????? ID="lblTotal" runat="server" Text="Label" Width="7px" Font-Bold="True" ForeColor="#0000C0"></asp:Label></td>
??????????????? <td align="center" style="width: 53px; height: 23px">
??????????????????? <asp:Label
??????????????? ID="Label3" runat="server" Text="Current: " Width="43px"></asp:Label></td>
??????????????? <td align="left" style="width: 160px; height: 23px">
??????????????????? <asp:Label
??????????????????? ID="lblCurrent" runat="server" Text="Label" Width="42px" Font-Bold="True" ForeColor="#0000C0"></asp:Label></td>
??????????? </tr>
??????????? <tr>
??????????????? <td align="center" style="width: 40px; height: 21px">
??????????????????? <asp:Button
??????????????????????? ID="btnFirst" runat="server" OnClick="btnFirst_Click"
??????????????????????? Text="First" Width="38px" /></td>
??????????????? <td align="center" style="width: 56px; height: 21px">
??????????????????? <asp:Button ID="btnPrevious" runat="server" OnClick="btnPrevious_Click" Text="Previous" Width="55px" /></td>
??????????????? <td align="center" style="width: 53px; height: 21px">
??????????????????? <asp:Button ID="btnNext"
??????????????????????????????? runat="server" OnClick="btnNext_Click" Text="Next" Width="55px" /></td>
??????????????? <td align="left" style="width: 160px; height: 21px">
??????????????????? <asp:Button
??????????????????????????????????? ID="btnLast" runat="server" OnClick="btnLast_Click"
??????????????????????????????????? Text="Last" Width="38px" /></td>
??????????? </tr>
??????? </table>
???
??? </div>
??? </form>
</body>
</html>
CODE: using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class datalist : System.Web.UI.Page
{
??? protected void Page_Load(object sender, EventArgs e)
??? {
??????? if (!IsPostBack)
??????? {
??????????? //初始化時設置當前頁為第一頁
??????????? lblCurrent.Text = "1";
??????????? bindDataToDatalist();
??????? }
??? }
??? private void bindDataToDatalist()
??? {
??????? int currentPage = Convert.ToInt32(lblCurrent.Text);
??????? SqlConnection con = DB.createCon();
??????? //初始化SqlDataAdapter 實例
??????? SqlDataAdapter sda = new SqlDataAdapter();
??????? sda.SelectCommand = new SqlCommand("select * from employees", con);
??????? DataSet ds = new DataSet();
??????? sda.Fill(ds, "emp");
??????? //DataList控件在綁定數據時，應先將DataKeyField屬性設置為數據表的主鍵。
??????? this.DataList1.DataKeyField = "EmployeeID";
??????? PagedDataSource ps = new PagedDataSource();
??????? ps.DataSource = ds.Tables["emp"].DefaultView;
??????? //啟用分頁
??????? ps.AllowPaging = true;
??????? //每頁顯示的項數
??????? ps.PageSize = 2;
??????? //獲取當前頁的索引，從0開始
??????? ps.CurrentPageIndex = currentPage - 1;
??????? this.btnFirst.Enabled = true;
??????? this.btnPrevious.Enabled = true;
??????? this.btnNext.Enabled = true;
??????? this.btnLast.Enabled = true;
??????? if (currentPage == 1)
??????? {
??????????? btnFirst.Enabled = false;
??????????? btnPrevious.Enabled = false;
??????? }
??????? //所有項所需的總頁數
??????? if (currentPage == ps.PageCount )
??????? {
??????????? btnLast.Enabled = false;
??????????? btnNext.Enabled = false;
??????? }
??????? //this.DataList1.DataSource = ds.Tables["emp"];
??????? //將lblTotal設置為總頁數
??????? this.lblTotal.Text = Convert.ToString(Convert.ToInt32(ps.PageCount));
??????? this.DataList1.DataSource = ps;
??????? this.DataList1.DataBind(); }
??? protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
??? {
??????? if (e.CommandName == "select")
??????? {
?????????? //獲取DataList控件中的選定項的索引；獲取DataList.Item控件中的DataListItem對象的索引
??????????? this.DataList1.SelectedIndex = e.Item.ItemIndex;
??????????? this.bindDataToDatalist();
??????? }
??? }
??? protected void DataList1_EditCommand(object source, DataListCommandEventArgs e)
??? {
??????? //設置選中行的索引為當前選擇行的索引
??????? this.DataList1.EditItemIndex = e.Item.ItemIndex;
??????? this.bindDataToDatalist();
??? } protected void DataList1_CancelCommand(object source, DataListCommandEventArgs e)
??? {
??????? //設置控件的編輯項的索引為-1，即取消編輯
??????? this.DataList1.EditItemIndex = -1;
??????? //取消選擇項
??????? this.DataList1.SelectedIndex = -1;
??????? this.bindDataToDatalist();
??? }
??? protected void DataList1_UpdateCommand(object source, DataListCommandEventArgs e)
??? {
??????? //查找索引對應的主鍵值，由DataKeys集合利用索引值取得各數據的索引值
??????? string empID = this.DataList1.DataKeys[e.Item.ItemIndex].ToString();
??????? //在編輯的行中查找對應的要更改的城市的名字，用FindControl()查找txtCity控件
??????? string city = ((TextBox)(e.Item.FindControl("txtCity"))).Text;
??????? SqlConnection con = DB.createCon();
??????? SqlCommand cmd = new SqlCommand("update employees_new set City='" + city + "' where EmployeeID='" + empID + "'", con);
??????? con.Open();
??????? cmd.ExecuteNonQuery();
??????? //設置選中行的索引為-1，取消該數據項的選擇
??????? this.DataList1.EditItemIndex = -1;
??????? this.bindDataToDatalist(); }
??? protected void DataList1_DeleteCommand(object source, DataListCommandEventArgs e)
??? {
??????? string empID = this.DataList1.DataKeys[e.Item.ItemIndex].ToString();
??????? SqlConnection con = DB.createCon();
??????? SqlCommand cmd = new SqlCommand("delete from employees_new where EmployeeID='" + empID + "'", con);
??????? con.Open();
??????? //對連接執行T-SQL語句，并返回受影響的行數
??????? cmd.ExecuteNonQuery();
??????? this.DataList1.EditItemIndex = -1;
??????? this.bindDataToDatalist();
??? } protected void btnFirst_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = "1";
??????? this.bindDataToDatalist();
??? }
??? protected void btnPrevious_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = Convert.ToString(Convert.ToInt32(this.lblCurrent.Text) - 1);
??????? this.bindDataToDatalist();
??????????? }
??? protected void btnNext_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = Convert.ToString(Convert.ToInt32(this.lblCurrent.Text) + 1);
??????? this.bindDataToDatalist();
??? }
??? protected void btnLast_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = this.lblTotal.Text;
??????? this.bindDataToDatalist();
??? } //退出查看詳細信息模式
??? protected void btnExit_Click(object sender, EventArgs e)
??? {
??????? this.DataList1.SelectedIndex = -1;
??????? this.bindDataToDatalist();
??? }
??
}
運行效果： 詳細信息： 編輯： 更新： 刪除：
<head runat="server">
??? <title>無標題頁</title>
</head>
<body>
??? <form id="form1" runat="server">
??? <div>
??????? <asp:DataList ID="DataList1" runat="server" Style="position: static;" BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical" Width="345px" OnItemCommand="DataList1_ItemCommand" OnEditCommand="DataList1_EditCommand" OnCancelCommand="DataList1_CancelCommand" OnUpdateCommand="DataList1_UpdateCommand" OnDeleteCommand="DataList1_DeleteCommand">
??????????? <ItemTemplate>
???????????????
??????????????? <asp:LinkButton ID="lBtnShowDetails" runat="server" Style="left: -15px;
??????????????????? position: static; top: 0px" Width="55px" CommandName="select" >Details</asp:LinkButton>
??????????????? <asp:LinkButton ID="lBtnEdit" runat="server" CommandName="edit" Width="31px">Edit</asp:LinkButton>
??????????????? <asp:LinkButton ID="lBtnDelete" runat="server" CommandName="delete" Width="42px" OnClientClick="return confirm( '你確定要刪除嗎?');">Delete </asp:LinkButton><%# DataBinder.Eval(Container.DataItem,"LastName") %><%# DataBinder.Eval(Container.DataItem,"FirstName") %>
??????????? </ItemTemplate>
??????????? <SelectedItemTemplate>
??????????? Name:<%# DataBinder.Eval(Container.DataItem, "LastName")%>
???????????????? <%# DataBinder.Eval(Container.DataItem,"FirstName") %>
???????????????? <br />
??????????? Birth:<%# DataBinder.Eval(Container.DataItem,"BirthDate","{0:D}") %>
???????????????? <br />
??????????? City:<%# DataBinder.Eval(Container.DataItem,"City") %>
???????????????? <br />
??????????? Address:<%# DataBinder.Eval(Container.DataItem,"Address") %>
??????????????? <br />
??????????????? <asp:Button ID="btnExit" runat="server" OnClick="btnExit_Click" Text="Exit" Width="44px" />
??????????? </SelectedItemTemplate>
??????????? <FooterStyle BackColor="#CCCCCC" Font-Bold="True" Font-Italic="False" Font-Overline="False"
??????????????? Font-Strikeout="False" Font-Underline="False" ForeColor="Black" HorizontalAlign="Center" Font-Size="10pt" />
??????????? <SelectedItemStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
??????????? <AlternatingItemStyle BackColor="Gainsboro" Font-Bold="False" Font-Italic="False" Font-Overline="False"
??????????????? Font-Strikeout="False" Font-Underline="False" />
??????????? <ItemStyle BackColor="#EEEEEE" ForeColor="Black" />
??????????? <HeaderTemplate>
??????????????? Employees Information
??????????? </HeaderTemplate>
??????????? <HeaderStyle BackColor="#000084" Font-Bold="True" Font-Italic="False" Font-Overline="False"
??????????????? Font-Strikeout="False" Font-Underline="False" ForeColor="White" HorizontalAlign="Center" />
??????????? <EditItemTemplate>
??????????????? <%# DataBinder.Eval(Container.DataItem,"LastName") %>
??????????????? <%# DataBinder.Eval(Container.DataItem,"FirstName") %>
??????????????? <br />
??????????????? <%# DataBinder.Eval(Container.DataItem,"City") %>
??????????????? <asp:TextBox ID="txtCity" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"City") %>' Width="94px"></asp:TextBox><br />
??????????????? <asp:LinkButton ID="LinkButton2" runat="server" CommandName="update" Width="40px" OnClientClick="return confirm('你確定保存嗎？');">Save</asp:LinkButton>
??????????????? <asp:LinkButton ID="LinkButton1" runat="server" CommandName="cancel">Cancel</asp:LinkButton>
??????????? </EditItemTemplate>
??????? </asp:DataList>
??????? <br />
??????? <table style="width: 345px">
??????????? <tr>
??????????????? <td align="center" style="width: 40px; height: 23px">
??????? <asp:Label ID="Label1" runat="server" Text="Total: " Width="35px"></asp:Label>
??????????????? </td>
??????????????? <td align="center" style="width: 56px; height: 23px">
??????????????????? <asp:Label
??????????? ID="lblTotal" runat="server" Text="Label" Width="7px" Font-Bold="True" ForeColor="#0000C0"></asp:Label></td>
??????????????? <td align="center" style="width: 53px; height: 23px">
??????????????????? <asp:Label
??????????????? ID="Label3" runat="server" Text="Current: " Width="43px"></asp:Label></td>
??????????????? <td align="left" style="width: 160px; height: 23px">
??????????????????? <asp:Label
??????????????????? ID="lblCurrent" runat="server" Text="Label" Width="42px" Font-Bold="True" ForeColor="#0000C0"></asp:Label></td>
??????????? </tr>
??????????? <tr>
??????????????? <td align="center" style="width: 40px; height: 21px">
??????????????????? <asp:Button
??????????????????????? ID="btnFirst" runat="server" OnClick="btnFirst_Click"
??????????????????????? Text="First" Width="38px" /></td>
??????????????? <td align="center" style="width: 56px; height: 21px">
??????????????????? <asp:Button ID="btnPrevious" runat="server" OnClick="btnPrevious_Click" Text="Previous" Width="55px" /></td>
??????????????? <td align="center" style="width: 53px; height: 21px">
??????????????????? <asp:Button ID="btnNext"
??????????????????????????????? runat="server" OnClick="btnNext_Click" Text="Next" Width="55px" /></td>
??????????????? <td align="left" style="width: 160px; height: 21px">
??????????????????? <asp:Button
??????????????????????????????????? ID="btnLast" runat="server" OnClick="btnLast_Click"
??????????????????????????????????? Text="Last" Width="38px" /></td>
??????????? </tr>
??????? </table>
???
??? </div>
??? </form>
</body>
</html>
CODE: using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class datalist : System.Web.UI.Page
{
??? protected void Page_Load(object sender, EventArgs e)
??? {
??????? if (!IsPostBack)
??????? {
??????????? //初始化時設置當前頁為第一頁
??????????? lblCurrent.Text = "1";
??????????? bindDataToDatalist();
??????? }
??? }
??? private void bindDataToDatalist()
??? {
??????? int currentPage = Convert.ToInt32(lblCurrent.Text);
??????? SqlConnection con = DB.createCon();
??????? //初始化SqlDataAdapter 實例
??????? SqlDataAdapter sda = new SqlDataAdapter();
??????? sda.SelectCommand = new SqlCommand("select * from employees", con);
??????? DataSet ds = new DataSet();
??????? sda.Fill(ds, "emp");
??????? //DataList控件在綁定數據時，應先將DataKeyField屬性設置為數據表的主鍵。
??????? this.DataList1.DataKeyField = "EmployeeID";
??????? PagedDataSource ps = new PagedDataSource();
??????? ps.DataSource = ds.Tables["emp"].DefaultView;
??????? //啟用分頁
??????? ps.AllowPaging = true;
??????? //每頁顯示的項數
??????? ps.PageSize = 2;
??????? //獲取當前頁的索引，從0開始
??????? ps.CurrentPageIndex = currentPage - 1;
??????? this.btnFirst.Enabled = true;
??????? this.btnPrevious.Enabled = true;
??????? this.btnNext.Enabled = true;
??????? this.btnLast.Enabled = true;
??????? if (currentPage == 1)
??????? {
??????????? btnFirst.Enabled = false;
??????????? btnPrevious.Enabled = false;
??????? }
??????? //所有項所需的總頁數
??????? if (currentPage == ps.PageCount )
??????? {
??????????? btnLast.Enabled = false;
??????????? btnNext.Enabled = false;
??????? }
??????? //this.DataList1.DataSource = ds.Tables["emp"];
??????? //將lblTotal設置為總頁數
??????? this.lblTotal.Text = Convert.ToString(Convert.ToInt32(ps.PageCount));
??????? this.DataList1.DataSource = ps;
??????? this.DataList1.DataBind(); }
??? protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
??? {
??????? if (e.CommandName == "select")
??????? {
?????????? //獲取DataList控件中的選定項的索引；獲取DataList.Item控件中的DataListItem對象的索引
??????????? this.DataList1.SelectedIndex = e.Item.ItemIndex;
??????????? this.bindDataToDatalist();
??????? }
??? }
??? protected void DataList1_EditCommand(object source, DataListCommandEventArgs e)
??? {
??????? //設置選中行的索引為當前選擇行的索引
??????? this.DataList1.EditItemIndex = e.Item.ItemIndex;
??????? this.bindDataToDatalist();
??? } protected void DataList1_CancelCommand(object source, DataListCommandEventArgs e)
??? {
??????? //設置控件的編輯項的索引為-1，即取消編輯
??????? this.DataList1.EditItemIndex = -1;
??????? //取消選擇項
??????? this.DataList1.SelectedIndex = -1;
??????? this.bindDataToDatalist();
??? }
??? protected void DataList1_UpdateCommand(object source, DataListCommandEventArgs e)
??? {
??????? //查找索引對應的主鍵值，由DataKeys集合利用索引值取得各數據的索引值
??????? string empID = this.DataList1.DataKeys[e.Item.ItemIndex].ToString();
??????? //在編輯的行中查找對應的要更改的城市的名字，用FindControl()查找txtCity控件
??????? string city = ((TextBox)(e.Item.FindControl("txtCity"))).Text;
??????? SqlConnection con = DB.createCon();
??????? SqlCommand cmd = new SqlCommand("update employees_new set City='" + city + "' where EmployeeID='" + empID + "'", con);
??????? con.Open();
??????? cmd.ExecuteNonQuery();
??????? //設置選中行的索引為-1，取消該數據項的選擇
??????? this.DataList1.EditItemIndex = -1;
??????? this.bindDataToDatalist(); }
??? protected void DataList1_DeleteCommand(object source, DataListCommandEventArgs e)
??? {
??????? string empID = this.DataList1.DataKeys[e.Item.ItemIndex].ToString();
??????? SqlConnection con = DB.createCon();
??????? SqlCommand cmd = new SqlCommand("delete from employees_new where EmployeeID='" + empID + "'", con);
??????? con.Open();
??????? //對連接執行T-SQL語句，并返回受影響的行數
??????? cmd.ExecuteNonQuery();
??????? this.DataList1.EditItemIndex = -1;
??????? this.bindDataToDatalist();
??? } protected void btnFirst_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = "1";
??????? this.bindDataToDatalist();
??? }
??? protected void btnPrevious_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = Convert.ToString(Convert.ToInt32(this.lblCurrent.Text) - 1);
??????? this.bindDataToDatalist();
??????????? }
??? protected void btnNext_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = Convert.ToString(Convert.ToInt32(this.lblCurrent.Text) + 1);
??????? this.bindDataToDatalist();
??? }
??? protected void btnLast_Click(object sender, EventArgs e)
??? {
??????? this.lblCurrent.Text = this.lblTotal.Text;
??????? this.bindDataToDatalist();
??? } //退出查看詳細信息模式
??? protected void btnExit_Click(object sender, EventArgs e)
??? {
??????? this.DataList1.SelectedIndex = -1;
??????? this.bindDataToDatalist();
??? }
??
}
運行效果： 詳細信息： 編輯： 更新： 刪除：
轉載于:https://blog.51cto.com/hndtraveller/179464
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