改变GridView文本框内容，另一列自动更新。

         AutoGenerateColumns="false"
        ID="GridView1" runat="server" Style="position: relative" OnRowDataBound="GridView1_RowDataBound">
           
               
                  
                      
                  
               
               
                    
                      
                  
               
               
                    
                      
                  
               
           

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.Text;

public partial class SettleMent_Income_test10 : System.Web.UI.Page
{
    wsBill.wsBill mybill = new wsBill.wsBill();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
                wsBill.BillQuery myBillQuery = new wsBill.BillQuery();
                DataSet ds = new DataSet();
                mybill.ExeQueryList(myBillQuery, ref ds);
                this.GridView1.DataSource = ds;
                this.GridView1.DataBind();
        }
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {

        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            TextBox tbprice=(e.Row.Cells[0].FindControl("price") as TextBox);
            TextBox tbnum = (e.Row.Cells[1].FindControl("num") as TextBox);
            TextBox tbamt = (e.Row.Cells[2].FindControl("amt") as TextBox);
          
            if (tbprice != null && tbnum != null && tbamt != null)
            {
                if (!string.IsNullOrEmpty(tbprice.Text))
                {
                    tbprice.Text = "0";
                }
                if (!string.IsNullOrEmpty(tbnum.Text))
                {
                    tbnum.Text = "0";
                }
                tbamt.Text = decimal.Parse(decimal.Parse(tbnum.Text) * decimal.Parse(tbprice.Text)).ToString();
                StringBuilder script = new StringBuilder();
                //输入数值之后总自动金额更新
                script.Append(" var amount=0;");
                script.Append(" vAmt=document.getElementById('" + tbamt.ClientID + "');");
                script.Append(" vNum=document.getElementById('" + tbnum.ClientID + "');");
                script.Append(" vPrice=document.getElementById('" + tbprice.ClientID + "');");
                script.Append("var amt=parseFloat(vPrice.value)*parseFloat(vNum.value);");
                script.Append("vAmt.value=amt;");
                //只允许输入带小数的数字.
                string scriptOnKeyPress=@"return   /^[1-9]/d{9}/.test(this.value)?(//./.test(this.value)?(//./d{2}/.test

(this.value)?(event.keyCode==0):(event.keyCode>=48&&event.keyCode<=57)):(event.keyCode==46)):

(event.keyCode>=48&&event.keyCode<=57)";
                tbprice.Attributes.Add("onblur", script.ToString());
                tbprice.Attributes.Add("onkeypress", scriptOnKeyPress);

                tbnum.Attributes.Add("onblur", script.ToString());
                tbprice.Attributes.Add("onkeypress", scriptOnKeyPress);
            }
        }
    }
}