我是asp.net的新手，任何人都可以帮助我。 我想在asp.net中创建一个动态网格，它有5个下拉列表绑定数据库 并选择第一个dropdownvalue第二个下拉绑定。它还添加了行＆amp;删除 行按钮。
<asp:UpdatePanel runat="server"><ContentTemplate>
<asp:GridView ID="grvparameterdetail" runat="server"
ShowFooter="True" AutoGenerateColumns="False"
CellPadding="4" ForeColor="#333333"
GridLines="None" OnRowDeleting="grvparameterDetails_RowDeleting"
>
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="SNo" />
<asp:TemplateField HeaderText="Company">
<ItemTemplate>
<asp:DropDownList DataSource='<%# bindcompany1() %>' DataTextField="Comp_Name" DataValueField="Comp_Code" ID="drpcompany" runat="server" AppendDataBoundItems="true" AutoPostBack="true" OnSelectedIndexChanged="drpcompany_indexedchanged">
<asp:ListItem Value="-1">Select</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Center">
<ItemTemplate>
<asp:DropDownList DataSource='<%# bindunit1() %>' DataTextField="center" DataValueField="Pub_cent_Code" ID="drpcenter" runat="server" AppendDataBoundItems="true">
<asp:ListItem Value="-1">Select</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Publ.Type">
<ItemTemplate>
<asp:DropDownList DataSource='<%# bindptype1() %>' DataTextField="pubname" DataValueField="pubtypecode" ID="drppubtype" runat="server" AppendDataBoundItems="true">
<asp:ListItem Value="-1">Select</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Publication">
<ItemTemplate>
<asp:DropDownList ID="drppub" runat="server" AppendDataBoundItems="true">
<asp:ListItem Value="-1">Select</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edition">
<ItemTemplate>
<asp:DropDownList ID="drppubed" runat="server" AppendDataBoundItems="true">
<asp:ListItem Value="-1">Select</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
<FooterStyle HorizontalAlign="Right" />
<FooterTemplate>
<asp:Button ID="ButtonAdd" runat="server"
Text="Add New Row" OnClick="ButtonAdd_Click" />
</FooterTemplate>
</asp:TemplateField>
<asp:CommandField ShowDeleteButton="True" />
</Columns>
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#EFF3FB" />
<EditRowStyle BackColor="#2461BF" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
aspx.cs代码
if (!Page.IsPostBack)
{
FirstGridViewRow();
}
private void FirstGridViewRow()
{
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
dt.Columns.Add(new DataColumn("Col1", typeof(string)));
dt.Columns.Add(new DataColumn("Col2", typeof(string)));
dt.Columns.Add(new DataColumn("Col3", typeof(string)));
dt.Columns.Add(new DataColumn("Col4", typeof(string)));
dt.Columns.Add(new DataColumn("Col5", typeof(string)));
dr = dt.NewRow();
dr["RowNumber"] = 1;
//dr["Col2"] = string.Empty;
//dr["Col3"] = string.Empty;
//dr["Col4"] = string.Empty;
//dr["Col5"] = string.Empty;
dt.Rows.Add(dr);
ViewState["CurrentTable"] = dt;
grvparameterdetail.DataSource = dt;
grvparameterdetail.DataBind();
}
private void AddNewRow()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumber"] = dtCurrentTable.Rows.Count + 1;
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;
for (int i = 1; i <= dtCurrentTable.Rows.Count - 1; i++)
{
DropDownList Drpcompany =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[1].FindControl("drpcompany");
DropDownList drpcenter =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[2].FindControl("drpcenter");
DropDownList drppubtype =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[3].FindControl("drppubtype");
DropDownList Drppublication =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[4].FindControl("drppub");
DropDownList Drpedition =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[5].FindControl("drppubed");
//drCurrentRow = dtCurrentTable.NewRow();
//drCurrentRow["RowNumber"] = i + 1;
dtCurrentTable.Rows[i]["Col1"] = Drpcompany.SelectedValue;
dtCurrentTable.Rows[i]["Col2"] = drpcenter.SelectedValue;
dtCurrentTable.Rows[i]["Col3"] = drppubtype.SelectedValue;
dtCurrentTable.Rows[i]["Col4"] = Drppublication.SelectedIndex;
dtCurrentTable.Rows[i]["Col5"] = Drpedition.SelectedValue;
rowIndex++;
}
//dtCurrentTable.Rows.Add(drCurrentRow);
//ViewState["CurrentTable"] = dtCurrentTable;
grvparameterdetail.DataSource = dtCurrentTable;
grvparameterdetail.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
DropDownList Drpcompany =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[1].FindControl("drpcompany");
DropDownList drpcenter =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[2].FindControl("drpcenter");
DropDownList drppubtype =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[3].FindControl("drppubtype");
DropDownList Drppublication =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[4].FindControl("drppub");
DropDownList Drpedition =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[5].FindControl("drppubed");
Drpcompany.SelectedValue = dt.Rows[i]["Col1"].ToString();
drpcenter.SelectedValue = dt.Rows[i]["Col2"].ToString();
drppubtype.SelectedValue = dt.Rows[i]["Col3"].ToString();
Drppublication.SelectedValue = dt.Rows[i]["Col4"].ToString();
Drpedition.SelectedValue = dt.Rows[i]["Col5"].ToString();
rowIndex++;
}
}
}
}
protected void grvparameterDetails_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
SetRowData();
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
int rowIndex = Convert.ToInt32(e.RowIndex);
if (dt.Rows.Count > 1)
{
dt.Rows.Remove(dt.Rows[rowIndex]);
drCurrentRow = dt.NewRow();
ViewState["CurrentTable"] = dt;
grvparameterdetail.DataSource = dt;
grvparameterdetail.DataBind();
for (int i = 0; i < grvparameterdetail.Rows.Count - 1; i++)
{
grvparameterdetail.Rows[i].Cells[0].Text = Convert.ToString(i + 1);
}
SetPreviousData();
}
}
}
private void SetRowData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
DropDownList Drpcompany =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[1].FindControl("drpcompany");
DropDownList drpcenter =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[2].FindControl("drpcenter");
DropDownList drppubtype =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[3].FindControl("drppubtype");
DropDownList Drppublication =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[4].FindControl("drppub");
DropDownList Drpedition =
(DropDownList)grvparameterdetail.Rows[rowIndex].Cells[5].FindControl("drppubed");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumber"] = i + 1;
dtCurrentTable.Rows[i - 1]["Col1"] = Drpcompany.SelectedValue;
dtCurrentTable.Rows[i - 1]["Col2"] = drpcenter.SelectedValue;
dtCurrentTable.Rows[i - 1]["Col3"] = drppubtype.SelectedValue;
dtCurrentTable.Rows[i - 1]["Col4"] = Drppublication.SelectedValue;
dtCurrentTable.Rows[i - 1]["Col5"] = Drpedition.SelectedValue;
rowIndex++;
}
ViewState["CurrentTable"] = dtCurrentTable;
//grvStudentDetails.DataSource = dtCurrentTable;
//grvStudentDetails.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//SetPreviousData();
}
protected void drpcompany_indexedchanged(object sender, EventArgs e)
{
//what to write here
}
提前致谢。
答案 0 :(得分：1)
我已经制作了示例代码，很容易了解如何启动任务。 我已经完成了harcoded数据..而不是硬编码使用数据库中的数据.. 评论......
第1页：aspx文件
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="jquery.js.js"></script>
<script type="text/javascript">
</script>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td>Last Name</td>
<td>
<asp:TextBox ID="txtLastName" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td>Speciality</td>
<td>
<asp:DropDownList ID="ddlSpeciality" runat="server">
<asp:ListItem Text="" />
<asp:ListItem Text="aaa" />
<asp:ListItem Text="bbb" />
<asp:ListItem Text="ccc" />
</asp:DropDownList></td>
</tr>
<tr>
<td>Location</td>
<td>
<asp:DropDownList ID="ddlLocation" runat="server">
<asp:ListItem Text="" />
<asp:ListItem Text="bangalore" />
<asp:ListItem Text="chennai" />
<asp:ListItem Text="hyderabad" />
</asp:DropDownList></td>
</tr>
<tr>
<td colspan="2" align="center">
<asp:Button ID="btnSearch" runat="server" Text="Search" OnClick="btnSearch_Click" /></td>
</tr>
</table>
</form>
</body>
</html>
第1页：cs文件
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSearch_Click(object sender, EventArgs e)
{
string lastName = txtLastName.Text.Trim();
string speciality = ddlSpeciality.Text;
string location = ddlLocation.Text;
Response.Redirect(string.Format("page2.aspx?lastname={0}&speciality={1}&location={2}",lastName ,speciality , location));
}
}
}
第2页：aspx文件
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="page2.aspx.cs" Inherits="WebApplication1.test" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="gvdata" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="lnkID" OnClick="LinkButton1_Click" Text="Details" runat="server"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
第2页：cs文件
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack) { }
else
{
string lastname = Request.QueryString["lastname"];
string speciality = Request.QueryString["speciality"];
string location = Request.QueryString["location"];
string query = lastname.Length == 0 ? "" : "lastname ='" + lastname + "' and";
query += speciality.Length == 0 ? "" : "speciality ='" + speciality + "' and";
query += location.Length == 0 ? "" : "location ='" + location + "' ";
query = query.Trim().TrimStart(new char[] { 'a', 'n', 'd' }).TrimEnd(new char[] { 'a', 'n', 'd' });
query = "select * from tablename where " +( query.Length == 0 ? "1=1" : query);
// use this query to get data from sql database
// use shld get the data from db
// for example, i have hardcoded the datatable with some values
DataTable dt = new DataTable();
dt.Columns.Add("ID", typeof(int));
dt.Columns.Add("lastname", typeof(string));
dt.Columns.Add("speciality", typeof(string));
dt.Columns.Add("location", typeof(string));
dt.Rows.Add(1, "karthik", "aaa", "bangalore");
dt.Rows.Add(2, "parthip", "aaa", "chennai");
dt.Rows.Add(3, "krishna", "aaa", "hyderabad");
gvdata.DataSource = dt;
gvdata.DataBind();
}
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
string id = ((sender as LinkButton).Parent.Parent as GridViewRow).Cells[1].Text;
Response.Redirect("page3.aspx?id=" + id);
}
}
}
第3页：aspx文件
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="page3.aspx.cs" Inherits="WebApplication1.page3" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div runat="server" id="divcontent">
</div>
</form>
</body>
</html>
第3页：cs文件
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class page3 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack) { }
else
{
string id = Request.QueryString["id"];
// use this id to fetch the data from db to get the details.
// get the data from db..
// i have hardcoded
DataTable dt = new DataTable();
dt.Columns.Add("ID", typeof(int));
dt.Columns.Add("lastname", typeof(string));
dt.Columns.Add("speciality", typeof(string));
dt.Columns.Add("location", typeof(string));
dt.Rows.Add(1, "karthik", "aaa", "bangalore");
Table tbl = new Table() { CellPadding=1 , CellSpacing=2 , BorderColor = System.Drawing.Color.Red, BorderWidth=1 };
foreach (DataColumn col in dt.Columns)
{
TableRow tr = new TableRow() { BorderWidth=1 , BorderColor = System.Drawing.Color.Red };
tr.Cells.Add( new TableCell () { BorderWidth=1 , BorderColor = System.Drawing.Color.Red ,Text = col.ColumnName});
tr.Cells.Add( new TableCell () { BorderWidth=1 , BorderColor = System.Drawing.Color.Red ,Text = dt.Rows[0][col].ToString()});
tbl.Rows.Add(tr);
}
divcontent.Controls.Add(tbl);
}
}
}
}