GridView加入自动求和求平均值小计

17.GridView加入自动求和求平均值小计

效果图：



解决方案：

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int

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();

}

}

后台全部代码：

using System;
using System.Data;
using System.Configuration;
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;
using System.Drawing;

public partial class Default7 : System.Web.UI.Page

{

SqlConnection sqlcon;

SqlCommand sqlcom;

string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

bind();

}

}

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

{

GridView1.EditIndex = e.NewEditIndex;

bind();

}

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

{

sqlcon = new SqlConnection(strCon);

string sqlstr = "update 飞狐工作室 set 姓名='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";

sqlcom = new SqlCommand(sqlstr, sqlcon);

sqlcon.Open();

sqlcom.ExecuteNonQuery();

sqlcon.Close();

GridView1.EditIndex = -1;

bind();

}

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

{

GridView1.EditIndex = -1;

bind();

}

public void bind()

{

string sqlstr = "select top 5 * from 飞狐工作室";

sqlcon = new SqlConnection(strCon);

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds, "飞狐工作室");

GridView1.DataSource = myds;

GridView1.DataKeyNames = new string[] { "身份证号码" };

GridView1.DataBind();

sqlcon.Close();

}

private double sum = 0;//取指定列的数据和

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();

}

}

}

前台：唯一的花头就是设置ShowFooter="True" ，否则默认表头为隐藏的！

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" OnRowDataBound="GridView1_RowDataBound" ShowFooter="True" >

<FooterStyle BackColor="White" ForeColor="#000066" />

<Columns>

<asp:CommandField HeaderText="编辑" ShowEditButton="True" />

<asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True" />

<asp:BoundField DataField="姓名" HeaderText="姓名" />

<asp:BoundField DataField="出生日期" HeaderText="邮政编码" />

<asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />

<asp:BoundField DataField="邮政编码" HeaderText="邮政编码" />

<asp:BoundField DataField="起薪" HeaderText="起薪" />

</Columns>

<RowStyle ForeColor="#000066" />

<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" CssClass="ms-formlabel DataGridFixedHeader"/>

<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />

</asp:GridView>