DataGrid实现增删（带提示）改和分页

@ Page language="c#" Codebehind="WebForm5.aspx.cs" AutoEventWireup="false" Inherits="csdn.WebForm5"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>WebForm5</title>

</HEAD>

<body>

<asp:textbox id="TextBox1" runat="server" Width="88px"></asp:textbox>

<asp:TextBox id="TextBox2" runat="server" Width="40px"></asp:TextBox>

<asp:Button id="Button1" runat="server" Text="添加"></asp:Button>

<asp:TextBox id="TextBox3" runat="server" Width="128px"></asp:TextBox>

<asp:Button id="Button2" runat="server" Text="筛选"></asp:Button>

<asp:Button id="Button3" runat="server" Text="下载"></asp:Button>

<asp:DataGrid ID="DataGrid1" runat="server" AutoGenerateColumns="False" DataKeyField="ID" AllowPaging="True"

PageSize="20" OnEditCommand="edit" OnCancelCommand="cancel" OnUpdateCommand="update">

<asp:TemplateColumn HeaderText="多选">

<input type="hidden" id="SelectedID" runat="server"

value='<%# Container.ItemIndex%>' name="SelectedID"/>

<asp:CheckBox ID="chkExport" runat="server" />

</itemtemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="单选">

# Container.ItemIndex+1%>

</itemtemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="姓名">

# myfunc(DataBinder.Eval(Container.DataItem,"vName")) %>

</itemtemplate>

<asp:TextBox ID="name" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"vName") %>' Width="88px"> </asp:TextBox>

</edititemtemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="年龄">

# DataBinder.Eval(Container.DataItem,"iAge") %>

</itemtemplate>

<asp:TextBox ID="age" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"iAge") %>' Width="40px"> </asp:TextBox>

</edititemtemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="打开">

<asp:HyperLink Text="打开" NavigateUrl='<%#"newpage.aspx?name="+DataBinder.Eval(Container.DataItem, "vname")+"&age="+DataBinder.Eval(Container.DataItem, "iage") %>' runat="server" Target="_blank"> </asp:HyperLink>

</itemtemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="打开">

<asp:HyperLink Text="打开" NavigateUrl='<%# myfunc2(DataBinder.Eval(Container.DataItem,"vName"),DataBinder.Eval(Container.DataItem,"iAge"))%> ' runat="server" Target="_blank" ID="Hyperlink1"> </asp:HyperLink>

</itemtemplate>

</asp:TemplateColumn>

<asp:EditCommandColumn ButtonType="LinkButton" UpdateText="更新" CancelText="取消" EditText="编辑"></asp:EditCommandColumn>

<asp:ButtonColumn Text="删除" CommandName="del"></asp:ButtonColumn>

</columns>

</asp:DataGrid>

<asp:Label id="Label1" runat="server"></asp:Label>

<asp:Button ID="button4" runat="server" Text="单选结果"></asp:Button>

<asp:Button id="Button5" runat="server" Text="多选结果"></asp:Button>

<asp:Button id="Button6" runat="server" Text="选中所有"></asp:Button>

<asp:Button id="Button7" runat="server" Text="取消所有"></asp:Button></form>

</body>

</HTML>

后台代码:

// C# Document

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Data.SqlClient;

using System.Drawing;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls; using System.IO;

namespace csdn

{

/**//// <summary>

/// WebForm5 的摘要说明。

/// </summary>

public class WebForm5 : System.Web.UI.Page

{

protected System.Web.UI.WebControls.TextBox TextBox1;

protected System.Web.UI.WebControls.TextBox TextBox2;

protected System.Web.UI.WebControls.Button Button1;

protected System.Web.UI.WebControls.TextBox TextBox3;

protected System.Web.UI.WebControls.Button Button2;

protected System.Web.UI.WebControls.Button Button3;

protected System.Web.UI.WebControls.Label Label1;

protected System.Web.UI.HtmlControls.HtmlInputHidden rd;

protected System.Web.UI.WebControls.Button button4;

protected System.Web.UI.WebControls.Button Button5;

protected System.Web.UI.WebControls.Button Button6;

protected System.Web.UI.WebControls.DataGrid DataGrid1;

protected System.Web.UI.WebControls.Button Button7;

private void Page_Load(object sender, System.EventArgs e)

{

string js = "";

js+="<script>\r\n";

js+="function ld(){\r\n";

js+="for(i=0;i<document.getElementsByName('rad').length;i++)\r\n";

js+="if(document.getElementsByName('rad')[i].value==";

js+="document.getElementById('rd').value) ";

js+="document.getElementsByName('rad')[i].checked=true\r\n";

js+="}\r\n";

js+="window.onload=ld\r\n";

js+="</script>\r\n";

this.RegisterClientScriptBlock("js",js);

if(!IsPostBack)

{

SetBind();

}

protected void SetBind()

{

SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);

SqlDataAdapter da=new SqlDataAdapter("select * from tb1",conn);

DataSet ds=new DataSet();

da.Fill(ds,"table1");

this.DataGrid1.DataSource=ds.Tables["table1"];

this.DataGrid1.DataBind();

this.Label1.Text=ds.Tables["table1"].Compute("avg(iAge)","iAge>20").ToString();

}

protected void SetBind(string s)

{

SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);

SqlDataAdapter da=new SqlDataAdapter("select * from tb1",conn);

DataSet ds=new DataSet();

da.Fill(ds,"table1");

DataView dv=ds.Tables["table1"].DefaultView;

dv.RowFilter=s;

this.DataGrid1.DataSource=dv;

this.DataGrid1.DataBind();

}

Web 窗体设计器生成的代码Web 窗体设计器生成的代码

private void Button1_Click(object sender, System.EventArgs e)

{

SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);

SqlCommand comm=new SqlCommand("insert into tb1 (vName,iAge) values (@vName,@iAge)",conn);

SqlParameter parm1=new SqlParameter("@vName",SqlDbType.NVarChar,50);

parm1.Value=this.TextBox1.Text;

SqlParameter parm2=new SqlParameter("@iAge",SqlDbType.Int);

parm2.Value=this.TextBox2.Text;

comm.Parameters.Add(parm1);

comm.Parameters.Add(parm2);

conn.Open();

comm.ExecuteNonQuery();

conn.Close();

SetBind();

}

private void DataGrid1_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

if(e.CommandName=="del"&&e.Item.ItemType!=ListItemType.EditItem)

{

SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);

SqlCommand comm=new SqlCommand("delete from tb1 where ID=@id",conn);

SqlParameter parm1=new SqlParameter("@id",SqlDbType.Int);

parm1.Value=this.DataGrid1.DataKeys[e.Item.ItemIndex];

comm.Parameters.Add(parm1);

conn.Open();

comm.ExecuteNonQuery();

conn.Close();

SetBind();

}

private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)

{

this.DataGrid1.CurrentPageIndex=e.NewPageIndex;

SetBind();

}

protected void edit(object sender,DataGridCommandEventArgs e)

{

this.DataGrid1.EditItemIndex=e.Item.ItemIndex;

SetBind();

}

protected void cancel(object sender,DataGridCommandEventArgs e)

{

this.DataGrid1.EditItemIndex=-1;

SetBind();

}

protected void update(object sender,DataGridCommandEventArgs e)

{

if(e.Item.ItemType==ListItemType.EditItem)

{

SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);

SqlCommand comm=new SqlCommand("update tb1 set vName=@vName,iAge=@iAge where ID=@id",conn);

SqlParameter parm1=new SqlParameter("@vName",SqlDbType.NVarChar,50);

parm1.Value=((TextBox)e.Item.FindControl("name")).Text;

SqlParameter parm2=new SqlParameter("@iAge",SqlDbType.Int);

parm2.Value=((TextBox)e.Item.FindControl("age")).Text;

SqlParameter parm3=new SqlParameter("@id",SqlDbType.Int);

parm3.Value=this.DataGrid1.DataKeys[e.Item.ItemIndex];

comm.Parameters.Add(parm1);

comm.Parameters.Add(parm2);

comm.Parameters.Add(parm3);

conn.Open();

comm.ExecuteNonQuery();

conn.Close();

this.DataGrid1.EditItemIndex=-1;

SetBind();

}

private void DataGrid1_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)

{

if(e.Item.ItemType==ListItemType.Item||e.Item.ItemType==ListItemType.AlternatingItem||e.Item.ItemType==ListItemType.EditItem)

{

((LinkButton)e.Item.Cells[7].Controls[0]).Attributes.Add("onclick","return confirm('delete?');");

}

private void Button2_Click(object sender, System.EventArgs e)

{

if(this.TextBox3.Text=="")

{

SetBind();

}

else

{

SetBind(this.TextBox3.Text);

}

private void DataGrid1_SelectedIndexChanged(object sender, System.EventArgs e)

{

}

private void Button3_Click(object sender, System.EventArgs e)

{

SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);

SqlDataAdapter da=new SqlDataAdapter("select * from tb1",conn);

DataSet ds=new DataSet();

da.Fill(ds,"table1");

DataTable dt=ds.Tables["table1"];

string name=System.Configuration.ConfigurationSettings.AppSettings["downloadurl"].ToString()+DateTime.Today.ToString("yyyyMMdd")+new Random(DateTime.Now.Millisecond).Next(10000).ToString()+".csv";

FileStream fs=new FileStream(name,FileMode.Create,FileAccess.Write);

StreamWriter sw=new StreamWriter(fs,System.Text.Encoding.GetEncoding("gb2312"));

sw.WriteLine("自动编号,姓名,年龄");

foreach(DataRow dr in dt.Rows)

{

sw.WriteLine(dr["ID"]+","+dr["vName"]+","+dr["iAge"]);

}

sw.Close();

Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(name));

Response.ContentType = "application/ms-excel";

Response.WriteFile(name);

Response.End();

}

private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)

{

if(e.Item.ItemType==ListItemType.Item||e.Item.ItemType==ListItemType.AlternatingItem||e.Item.ItemType==ListItemType.EditItem)

{

if(Convert.ToInt16(DataBinder.Eval(e.Item.DataItem,"iAge"))<30)e.Item.BackColor=Color.Pink;

}

protected string myfunc(object s)

{

string _s;

if(s.ToString()=="朱晔")

_s="<b>"+s.ToString()+"</b>";

else

_s=s.ToString();

return _s;

}

protected string myfunc2(object s1,object s2)

{

return "newpage.aspx?name="+s1.ToString()+"&age="+s2.ToString();

}

private void Button4_Click(object sender, System.EventArgs e)

{

if(Request.Form["rad"] != null)

{

rd.Value = Request.Form["rad"].ToString();

this.Label1.Text = "选择的行号：" + Request.Form["rad"].ToString();

}

private void Button5_Click(object sender, System.EventArgs e)

{

this.Label1.Text="";

foreach(DataGridItem di in this.DataGrid1.Items)

{

if(((CheckBox)di.FindControl("chkExport")).Checked==true)

{

this.Label1.Text+=this.DataGrid1.DataKeys[int.Parse(((HtmlInputHidden)di.FindControl("SelectedID")).Value)]+"<br>";

}

private void Button6_Click(object sender, System.EventArgs e)

{

foreach(DataGridItem di in this.DataGrid1.Items)

{

((CheckBox)di.FindControl("chkExport")).Checked=true;

}

private void Button7_Click(object sender, System.EventArgs e)

{

foreach(DataGridItem di in this.DataGrid1.Items)

{

((CheckBox)di.FindControl("chkExport")).Checked=false;

}

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DataGrid实现增删（带提示）改和分页

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