GridView控件的一些知識

一、GridView控件編輯、更新、刪除示例(更新包含有DropDownList控件使用

GridView控件修改、刪除例子，修改時含有DropDownList控件。
示例運行效果圖：

GridViewUp.aspx文件代碼：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewUp.aspx.cs" Inherits="gridview_GridViewUp" %>

<!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>
<table cellpadding="0" cellspacing="0" border="0" width="80%" style="font-size: 11px">
<tr>
<td align="center">
<asp:GridView ID="GridView1" runat="server" Width="100%" CellPadding="4" ForeColor="#333333"
AutoGenerateColumns="False" AllowPaging="True" PageSize="12" OnRowCancelingEdit="GridView1_RowCancelingEdit"
OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" OnRowDeleting="GridView1_RowDeleting"
DataKeyNames="id,name" OnPageIndexChanging="GridView1_PageIndexChanging" DataMember="card,price" OnRowDataBound="GridView1_RowDataBound" GridLines="None">
<Columns>
<asp:BoundField HeaderText="身份證號" DataField="card" Visible=false />
<asp:BoundField HeaderText="編號" DataField="id" ReadOnly="True" />
<asp:BoundField DataField="name" HeaderText="姓名" ReadOnly="True" />
<asp:TemplateField HeaderText="身份證號">
<ItemTemplate>
<%# Eval("card") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TBCard" Text='<%# Eval("card") %>' runat="server" Width="140px" />
</EditItemTemplate>
<ItemStyle Width="150px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="學歷">
<ItemTemplate>
<%# Eval("description")%>
</ItemTemplate>
<EditItemTemplate>
<asp:HiddenField ID="HDFXueli" runat="server" Value='<%# Eval("xueli") %>' />
<asp:DropDownList ID="DDLXueli" runat="server" Width="90px" />
</EditItemTemplate>
<ItemStyle Width="100px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="價格">
<ItemTemplate>
<%# Eval("price") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TBPrice" Text='<%# Eval("price") %>' runat="server" Width="90px" />
</EditItemTemplate>
<ItemStyle Width="100px" />
</asp:TemplateField>
<asp:BoundField HeaderText="建立時間" DataField="createdate" ReadOnly="True" />
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" HeaderText="操作" />
</Columns>
<PagerSettings FirstPageText="" LastPageText="" NextPageText="" PreviousPageText="" />
<RowStyle Height="20px" BackColor="#F7F6F3" ForeColor="#333333" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>

GridViewUp.aspx.cs文件代碼：
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 gridview_GridViewUp : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GridViewBind();
}
}

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
GridViewBind();
}

private void GridViewBind()
{
string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
string SqlStr = "SELECT a.*,b.description FROM test01 a,xueli b where a.xueli=b.code and a.id<1000 and a.id>200";
DataSet ds = new DataSet();

try
{
SqlConnection conn = new SqlConnection(connStr);
if (conn.State.ToString() == "Closed") conn.Open();
SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
da.Fill(ds, "test01");
if (conn.State.ToString() == "Open") conn.Close();

GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
}
catch (Exception ex)
{
Response.Write("數據庫錯誤，錯誤原因：" + ex.Message);
Response.End();
}
}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (((DropDownList)e.Row.FindControl("DDLXueli")) != null)
{
DropDownList ddlxueli = (DropDownList)e.Row.FindControl("DDLXueli");

// 生成 DropDownList 的值，綁定數據
string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
string SqlStr = "SELECT * from xueli";
DataSet ds = new DataSet();

SqlConnection conn = new SqlConnection(connStr);
if (conn.State.ToString() == "Closed") conn.Open();
SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
da.Fill(ds, "xueli");
if (conn.State.ToString() == "Open") conn.Close();

ddlxueli.DataSource = ds.Tables[0].DefaultView;
ddlxueli.DataTextField = "description";
ddlxueli.DataValueField = "code";
ddlxueli.DataBind();
//

// 選中 DropDownList
ddlxueli.SelectedValue = ((HiddenField)e.Row.FindControl("HDFXueli")).Value;
//
}
}

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
GridViewBind();
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
GridViewBind();
}

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
string card = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBCard")).Text;
string xueli = ((DropDownList)GridView1.Rows[e.RowIndex].FindControl("DDLXueli")).SelectedValue;
string price = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBPrice")).Text;

string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
string SqlStr = "update test01 set card='" + card + "',xueli='" + xueli + "',price='" + price + "' where id=" + id;

try
{
SqlConnection conn = new SqlConnection(connStr);
if (conn.State.ToString() == "Closed") conn.Open();
SqlCommand comm = new SqlCommand(SqlStr, conn);
comm.ExecuteNonQuery();
comm.Dispose();
if (conn.State.ToString() == "Open") conn.Close();

GridView1.EditIndex = -1;
GridViewBind();
}
catch (Exception ex)
{
Response.Write("數據庫錯誤，錯誤原因：" + ex.Message);
Response.End();
}
}

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
string SqlStr = "delete from test01 where id=" + id;

try
{
SqlConnection conn = new SqlConnection(connStr);
if (conn.State.ToString() == "Closed") conn.Open();
SqlCommand comm = new SqlCommand(SqlStr, conn);
comm.ExecuteNonQuery();
comm.Dispose();
if (conn.State.ToString() == "Open") conn.Close();

GridView1.EditIndex = -1;
GridViewBind();
}
catch (Exception ex)
{
Response.Write("數據庫錯誤，錯誤原因：" + ex.Message);
Response.End();
}
}
}

sql server2000生成表代碼：
CREATE TABLE [dbo].[test01] (
[id] [decimal](18, 0) IDENTITY (1, 1) NOT NULL ,
[name] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[card] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[xueli] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[price] [decimal](18, 0) NULL ,
[createdate] [datetime] NULL
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[test01] ADD
CONSTRAINT [DF_test01_createdate] DEFAULT (getdate()) FOR [createdate],
CONSTRAINT [PK_test01] PRIMARY KEY CLUSTERED
(
[id]
) ON [PRIMARY]
GO

CREATE TABLE [dbo].[xueli](
[id] [int] IDENTITY(1,1) NOT NULL,
[code] [int] NULL,
[description] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL,
CONSTRAINT [PK_xueli] PRIMARY KEY CLUSTERED
(
[id] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

xueli表中的數據：
id code description
1 1 博士
2 2 碩士
3 3 學士

二、GridView控件綁定數據、分頁、排序

GridView控件Code：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
BackColor="White" BorderStyle="None"
CellPadding="4" EnableModelValidation="True"
AllowPaging="True" AllowSorting="True" PageSize="15"
OnPageIndexChanging="GridView1_PageIndexChanging" Width="100%"
Font-Names="tahoma" GridLines="None"
onselectedindexchanged="GridView1_SelectedIndexChanged"
HorizontalAlign="Center" CssClass="tablestyle" onsorting="GridView1_Sorting">
<AlternatingRowStyle BorderStyle="None" />
<Columns>
<asp:TemplateField HeaderText="State" SortExpression="State">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("State") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Image ID="Image1" runat="server" ImageUrl='<%# Bind("StateImg") %>' />
<asp:Label ID="Label1" runat="server" Text='<%# Bind("State") %>' Visible="false"></asp:Label>
</ItemTemplate>
<HeaderStyle Width="8%" CssClass="state" />
<ItemStyle CssClass="state" />
</asp:TemplateField>
<asp:HyperLinkField DataTextField="Title" HeaderText="Title" SortExpression="Title" >
<HeaderStyle Width="58%" CssClass="titlelink" />
<ItemStyle CssClass="titlelink" />
</asp:HyperLinkField>
<asp:TemplateField HeaderText="Score" SortExpression="Score">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Score") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Image ID="Image2" runat="server" ImageUrl="/sites/asd/Lists/Photos/_w/gold_png.jpg"/>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("Score") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle CssClass="score" Width="10%" />
<ItemStyle CssClass="score" />
</asp:TemplateField>
<asp:BoundField DataField="Replies" HeaderText="Replies" SortExpression="Replies" >
<HeaderStyle Width="10%" CssClass="replies" />
<ItemStyle CssClass="replies" />
</asp:BoundField>
<asp:BoundField DataField="Date" HeaderText="Date" SortExpression="Date" >
<HeaderStyle Width="" />
<ItemStyle CssClass="publishdate" />
</asp:BoundField>
</Columns>
<EmptyDataRowStyle BorderStyle="None" />
<FooterStyle BackColor="#FFFFCC" ForeColor="#330099" BorderStyle="None" />
<HeaderStyle BackColor="#F2F2F2" Font-Bold="True" ForeColor="#555"
BorderStyle="None" HorizontalAlign="Left" />
<PagerStyle BackColor="#F2F2F2" ForeColor="#330099" HorizontalAlign="Right" />
<PagerTemplate>
<asp:Label ID="lblPage" runat="server" Text='<%# "第" + (((GridView)Container.NamingContainer).PageIndex + 1) + "頁/共" + (((GridView)Container.NamingContainer).PageCount) + "頁" %> '></asp:Label>
<asp:LinkButton ID="lbnFirst" runat="Server" Text="首頁" Visible='<%# ((GridView)Container.NamingContainer).PageIndex != 0 %>' CommandName="Page" CommandArgument="First" ></asp:LinkButton>
<asp:LinkButton ID="lbnPrev" runat="server" Text="上一頁" Visible='<%# ((GridView)Container.NamingContainer).PageIndex != 0 %>' CommandName="Page" CommandArgument="Prev" ></asp:LinkButton>
<asp:LinkButton ID="lbnNext" runat="Server" Text="下一頁" Visible='<%# ((GridView)Container.NamingContainer).PageIndex != (((GridView)Container.NamingContainer).PageCount - 1) %>' CommandName="Page" CommandArgument="Next" ></asp:LinkButton>
<asp:LinkButton ID="lbnLast" runat="Server" Text="尾頁" Visible='<%# ((GridView)Container.NamingContainer).PageIndex != (((GridView)Container.NamingContainer).PageCount - 1) %>' CommandName="Page" CommandArgument="Last" ></asp:LinkButton>
</PagerTemplate>
<RowStyle BackColor="White" ForeColor="#330099" BorderStyle="None" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
</asp:GridView>

C#後臺代碼：

protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindData();
}
}

public void BindData()
{
Common common = new Common();
SPWeb web = common.GetWebObj();
SPList list = common.GetListObj("Posts");
DataTable data = new DataTable();
data = common.ShowAllQuestions(list);
string sortExpression = this.GridView1.Attributes["SortExpression"];
string sortDirection = this.GridView1.Attributes["SortDirection"];
if ((!string.IsNullOrEmpty(sortExpression)) && (!string.IsNullOrEmpty(sortDirection)))
{
data.DefaultView.Sort = string.Format("{0} {1}", sortExpression, sortDirection);
}
if (data != null)
{
GridView1.DataSource = data;
GridView1.DataBind();
}
}

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
BindData();
}

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
GridView1.PageIndex = 0;
string sortExpression = e.SortExpression.ToString();
string sortDirection = "ASC";
if (sortExpression == this.GridView1.Attributes["SortExpression"])
{
sortDirection = (this.GridView1.Attributes["SortDirection"].ToString() == sortDirection ? "DESC" : "ASC");
}

Common c = new Common();
List<string> Columns = c.Columns;
Columns.RemoveAt(0);

foreach (string i in Columns)
{
GridView1.Columns[Columns.IndexOf(i)].HeaderText = i;
}

if (sortDirection == "ASC")
{
GridView1.Columns[Columns.IndexOf(sortExpression)].HeaderText = sortExpression + " ↑";
}
else if (sortDirection == "DESC")
{
GridView1.Columns[Columns.IndexOf(sortExpression)].HeaderText = sortExpression + " ↓";
}
this.GridView1.Attributes["SortExpression"] = sortExpression;
this.GridView1.Attributes["SortDirection"] = sortDirection;
BindData();
}