Gridview常用技巧

1.gridview行绑定删除事件

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

int i;

//执行循环，保证每条数据都可以更新

for (i = 0; i < GridView1.Rows.Count; i++)

{

//首先判断是否是数据行

if (e.Row.RowType == DataControlRowType.DataRow)

{

//当鼠标停留时更改背景色

e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#dee9f9'");

//当鼠标移开时还原背景色

e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c");

}

}

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if (e.Row.RowType == DataControlRowType.DataRow)

{

if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)

{

((LinkButton)e.Row.Cells[8].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除： \"" + e.Row.Cells[5].Text + "\" 的 \""+ e.Row.Cells[1].Text +"\" 的等级考试报名吗?')");

}

}

}

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protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

{

SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["strcon"]);

con.Open();

string id = GridView1.DataKeys[e.RowIndex].Value.ToString();

SqlCommand scd = new SqlCommand("delete  from ts_xs_fourSixGradeTextSignUp where id='" + id + "'", con);

scd.ExecuteNonQuery();

con.Close();

this.bind();

}

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protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

{

string id = GridView1.DataKeys[e.NewEditIndex].Value.ToString();

Response.Write("<script>window.open('std_addGradeTestSignUpInfoList.aspx?id=" + id + "','','width=740,height=410')</script>");

Response.Write("<script>location='javascript:history.go(-1)'</script>");

}

2.JavaScript弹出对话框

Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script language=javascript>alert('回复留言失败！');</script>");

Response.Write("<script>alert('登陆成功！');history.go(-1);</script>");

3.GridView和CheckBox结合：

protected void CheckBox2_CheckedChanged(object sender, EventArgs e)

{

for (int i = 0; i <= GridView1.Rows.Count - 1; i++)

{

CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");

if (CheckBox2.Checked == true)

{cbox.Checked = true;}

else

{ cbox.Checked = false;}

}

}

4.留言板：

Gridview自定义模板

<%@ Import Namespace="System.Data" %>

<div id="div2" runat=server>

<asp:ScriptManager ID="ScriptManager1" runat="server" > </asp:ScriptManager>

<asp:UpdatePanel ID="UpdatePanel1" runat="server"UpdateMode="Conditional">

<ContentTemplate>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width="200px" OnPageIndexChanging="GridView1_PageIndexChanging" AllowPaging=true PageSize="6" GridLines=None>

<Columns>

<asp:TemplateField>

<ItemTemplate>

<table border="0" cellpadding="0" height=150 width=800>

<tr><td rowspan="3" style="width:120px" >

<asp:Image ID="Image2" runat="server" ImageUrl='<%#((DataRowView)Container.DataItem)["PicUrl"]%>'/><br/>

<div id="div12" style="text-align:left">

昵称：<%# ((DataRowView)Container.DataItem)["UserName"]%>

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E-mail：<%# ((DataRowView)Container.DataItem)["userEmail"]%>

来自：<%# ((DataRowView)Container.DataItem)["UserIP"].ToString().Substring(0, ((DataRowView)Container.DataItem)["UserIP"].ToString().LastIndexOf(".")+1)%>

</div></td>

<td colspan="2" style="height: 20px; text-align:left;">

<asp:Image ID="Image3" runat="server" ImageUrl='<%# ((DataRowView)Container.DataItem)["faceurl"]%>'/>

发表于：<%# ((DataRowView)Container.DataItem)["Addtime"]%>

</td></tr>

<tr><td colspan="2" valign="top" height="50" style="text-align:left;">

<%# ((DataRowView)Container.DataItem)["UserContent"] %>

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<div id="main1"  style="margin-top:40px;border:#ff9966 1px solid;" visible='<%#(((DataRowView)Container.DataItem)["adminReply"]).ToString()==""?false:true %>' runat=server > <font color=red> 管理员回复：<br/><%# ((DataRowView)Container.DataItem)["adminReply"]%></font>   </div>

</td></tr></table>

</ItemTemplate>

</asp:TemplateField>

</Columns></asp:GridView>

</ContentTemplate>

<Triggers>

<asp:AsyncPostBackTrigger ControlID="GridView1" EventName="PageIndexChanging"/>

</Triggers>

</asp:UpdatePanel>

</div>

5.从一个另外一个页面获取获取gridveiw中数据

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" PageSize="8" AutoGenerateColumns="False" EmptyDataText="暂时没有留言" OnPageIndexChanging="GridView1_PageIndexChanging" CellPadding="4" ForeColor="#333333" GridLines="None" Width="700px" OnRowDeleting="GridView1_RowDeleting" OnRowDataBound="GridView1_RowDataBound">

<Columns>

<asp:HyperLinkField DataNavigateUrlFields="id"//绑定到超链接的属性字段DataNavigateUrlFormatString="UserInfo.aspx?id={0}"

//对绑定的超链接NavigateUrl属性值的格式设置以便在UserInfo.aspx页面用Request.QueryString["id"]获取gridview的指定列主键id

{public void init()

{ //用Request.QueryString["id"].ToString()获取gridview的主键id

string id = Request.QueryString["id"].ToString();

if (id != null && id != "")

{

string sql = "select * from message where id=" + id;

DataSet ds = db.GetData(sql, "message");

this.username.Text = ds.Tables["message"].Rows[0]["username"].ToString();

//DataRowView rv = ds.Tables["0"].DefaultView[0];

//this.username.Text = rv["username"].ToString();

}

}

DataTextField="username" HeaderText="用户" Target="_self" />

<asp:BoundField DataField="useremail" HeaderText="邮件" />

<asp:BoundField DataField="userurl" HeaderText="个人网站" />

<asp:CommandField ShowDeleteButton="True" />  </Columns>

</asp:GridView>

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<asp:TemplateField>

<ItemTemplate>

<asp:LinkButton ID="lbtnViewStudents" runat="server"  CommandArgument='<%#Eval("pc_id")%>'>查看选课学生</asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

#region 查看选课学生

protected void gv_TeachCoures_RowCommand(object sender, GridViewCommandEventArgs e)

{

Response.Redirect("ViewStudentChoose.aspx?pc_id=" + e.CommandArgument.ToString());

}

#endregion

<asp:TemplateField>

<HeaderTemplate >

教师编号

</HeaderTemplate>

<ItemTemplate >

<a id="A1" href= "#"

onclick='javascript:showDetail(<%#DataBinder.Eval(Container.DataItem, "id")%>);'><font style=" text-decoration: underline;"><asp:label id= "laid" runat= "server"  Text= '<%#Bind("jsgh")%>' Width="160px"> </asp:label>

</font></a>

</ItemTemplate>

</asp:TemplateField>

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<asp:TemplateField HeaderText="编辑">

<ItemTemplate>

<asp:Button ID='ButtonD' runat="server" CssClass="button"  CommandName="del"   CommandArgument=<%#bind("id")%> Text="删除" />

</ItemTemplate>

</asp:TemplateField>

/// 删除事件

protected void gvTeacher_RowCommand(object sender, GridViewCommandEventArgs e)

{

if (e.CommandName == "del")

{

int id = Convert.ToInt32(e.CommandArgument.ToString());

teacherBll.Delete(id);

this.pager.CurPage = this.ddlstPage.SelectedIndex + 1;

this.strWhere = this.hfdQeuryCondition.Value;

FillGridView();

}

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}

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6.删除gridveiw选中行

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

{

string sql = "select * from message";

OleDbDataAdapter da = new OleDbDataAdapter(sql,conn);

OleDbCommandBuilder oc = new OleDbCommandBuilder(da);

DataSet ds = new DataSet();

da.Fill(ds,"b");

DataRow row = ds.Tables["b"].Rows[e.RowIndex];

row.Delete();

da.Update(ds,"b");

this.ShowInfo();

}

7.//设置gridview中指定列的内容和鼠标移动是改变行颜色

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

//int i;

////执行循环，保证每条数据都可以更新

//for (i = 0; i < GridView1.Rows.Count; i++)

//{

if (e.Row.RowType == DataControlRowType.DataRow)

{

e.Row.Attributes.Add("onmouseover","this.style.backgroundColor='#E6F5FA'");

e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");

if (e.Row.Cells[4].Text.Trim() == "0")

{

{e.Row.Cells [4].Text=" <font color=red>隐藏</font>";}

else

{e.Row .Cells[4].Text="公开";}

}       ((LinkButton)(e.Row.Cells[6].Controls[0])).Attributes.Add("onclick","return confirm('确定要删除吗？')");

}

}

8.GridView实现删除时弹出确认对话框：

双击GridView的OnRowDataBound事件；

在后台的GridView1_RowDataBound()方法添加代码，最后代码如下所示：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{   //如果是绑定数据行

if (e.Row.RowType == DataControlRowType.DataRow)

{

if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)

{

((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除：\"" + e.Row.Cells[1].Text + "\"吗?')");

}

}

}

/// GV 数据绑定事件

protected void gvTeacher_RowDataBound(object sender, GridViewRowEventArgs e)

{

//首先判断是否是数据行

if (e.Row.RowType == DataControlRowType.DataRow)

{

//当鼠标停留时更改背景色

e.Row.Attributes.Add("onmouseover", " this.style.backgroundColor='#C0FAFF'");

//当鼠标移开时还原背景色

e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c");

//编辑按钮onclick事件

string url = "TeacherAdd.aspx?id=" + this.gvTeacher.DataKeys[e.Row.RowIndex].Value;

string OnClientClick = CommonPage.Fpage_f_win_opendialog_returnvalue(this.Page, url, 850, 600);

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//窗口事件

public static string Fpage_f_win_opendialog_returnvalue(System.Web.UI.Page page, string URL, int width, int height)

{

string js2 = "javascript:";

js2 += string.Format("res=window.showModalDialog(\"{0}\",window,\"

status:no;resizable:no;dialogWidth:{1}px;dialogHeight:{2}px\");", URL, width.ToString(), height.ToString());

js2 += "if (res==\"pleasefresh\")" + " {" + " refresh();" + "}";

return js2;

}

例子：

//新增按钮Onclick事件字符串

string OnAddClientClick =Fpage_f_win_opendialog_returnvalue(this.Page, "TeacherAdd.aspx", 850, 600);

//绑定新增按钮btnAdd Onclick事件

this.btnAdd.Attributes.Add("onclick", OnAddClientClick);

((HtmlInputButton)e.Row.FindControl("ButtonE")).Attributes.Add("onclick", OnClientClick);

//删除按钮onclick事件

string ondeleteclick = "javascript:return confirm('是否删除教师" + e.Row.Cells[2].Text + "?')";              ((Button)e.Row.FindControl("ButtonD")).Attributes.Add("onclick",ondeleteclick;

}

}

9.GridView加入自动求和求平均值小计

private double sum = 0;//取指定列的数据和，你要根据具体情况对待可能你要处理的是protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowIndex >= 0)

{

sum += Convert.ToDouble(e.Row.Cells[6].Text);

}

else if (e.Row.RowType == DataControlRowType.Footer)

{

e.Row.Cells[5].Text = "总薪水为：";

e.Row.Cells[6].Text = sum.ToString();

e.Row.Cells[3].Text = "平均薪水为：";

e.Row.Cells[4].Text = ((int)(sum / GridView1.Rows.Count)).ToString();

}

}

10.配置文件连接数据和取得web.config键值

<connectionStrings>

<!-- SQL connection string for Inventory database lookup -->

<add name="SQLConnetionString" connectionString="server=(local);user id=sa;password=;database=OfficeAutoDB;min pool size=4;max pool size=4;packet size=3072" providerName="System.Data.SqlClient">

</add>

</connectionStrings>

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<appSettings>

<add key ="DSExcel" value="Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" ></add>

<add key="Excel" value ="App_Data\excel.xls"></add>

</appSettings>

private readonly string DSExcel = ConfigurationSettings.AppSettings["DSExcel"].ToString();

private readonly string Excel = ConfigurationSettings.AppSettings["Excel"].ToString();

public static string sqlcon = ConfigurationManager.ConnectionStrings["SQLConnetionString"].ToString();

11.GridView数据导入Excel/Excel数据读入GridView

由于是文件操作所以要引入名称空间IO和Text

using System.IO;

using System.Text;

using System.Drawing;

//导入Excel

protected void Button1_Click(object sender, EventArgs e)

{

Export("application/ms-excel", "学生成绩报表.xls");

}

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private void Export(string FileType, string FileName)

{

Response.Charset = "GB2312";

Response.ContentEncoding = System.Text.Encoding.UTF7;

Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());

Response.ContentType = FileType;

this.EnableViewState = false;

StringWriter tw = new StringWriter();

HtmlTextWriter hw = new HtmlTextWriter(tw);

GridView1.RenderControl(hw);

Response.Write(tw.ToString());

Response.End();

}

//如果没有下面方法会报错类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内

public override void VerifyRenderingInServerForm(Control control)

{

}

//读取Excel数据

private DataSet CreateDataSource()

{

string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~\\App_Data\\excel.xls") + ";Extended Properties=Excel 8.0 ;";

OleDbConnection olecon = new OleDbConnection(strCon);

// string ExcelDbPath = DSExcel + Server.MapPath(Excel) + ";";

// OleDbConnection olecon = new OleDbConnection(ExcelDbPath);

OleDbDataAdapter myda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", olecon);

DataSet myds = new DataSet();

myda.Fill(myds);

return myds;

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}

protected void Button1_Click(object sender, EventArgs e)

{

GridView1.DataSource = CreateDataSource();

GridView1.DataBind();

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}

11.GridView动态分页取出当前显示需要显示的记录

private DataSet GetCachingData(int nStartIndex, int nMaxIndex)

{

string sql = "select * from Files";

SqlConnection cn = new SqlConnection(sqlcon);

string counttext = "select count(*) as countFiles from Files";

SqlCommand cmd = new SqlCommand(counttext, cn);

SqlDataAdapter adapter = new SqlDataAdapter(sql, cn);

DataSet ds = new DataSet();

cn.Open();

int nMaxcount = Int32.Parse(cmd.ExecuteScalar().ToString());

int nPagecount = nMaxcount / GridView1.PageSize;

if (GridView1.PageSize * nPagecount < nMaxcount)

{

nPagecount++;

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}

adapter.Fill(ds, nStartIndex, nMaxIndex, "Files");

cn.Close();

return (ds);

}

private void BindData()

{

DataSet ds = new DataSet();

if (GridView1.PageIndex == 0)

{

ds = GetCachingData(0, GridView1.PageSize);

}

else

{

if (GridView1.PageIndex > 1)

{

ds = GetCachingData((GridView1.PageIndex - 1) * GridView1.PageSize, GridView1.PageSize);

}

}

if (ds != null && ds.Tables.Count > 0)

{

GridView1.DataSource = ds;

GridView1.DataBind();

}

}

//选中checkbox

private ArrayList GetSelected()

{ ArrayList selected = new ArrayList();

for (int i = 0; i <= gvTeacher.Rows.Count - 1; i++)

{

if (((CheckBox)gvTeacher.Rows[i].FindControl("chkBox1")).Checked)

selected.Add(Convert.ToInt32(gvTeacher.DataKeys[i].Value));

}

return selected;

}