动态添加JavaScript的控制Asp.net C＃ [英] Dynamically add controls javascript Asp.net C#
问题描述
我想asp.net C＃的页面上添加控件，当用户点击添加另一个。我使用的表，要附加在该表中的控件。也让我知道，我将如何得到一次表单提交给服务器后面code控制值。
I am trying to add controls on asp.net c# page, when user clicks on add another. I am using table and want to append controls in that table. Also let me know, How I will get controls values in code behind once form is submitted to server.
推荐答案
下面是一个jQuery的例子，希望它能帮助！
Here's a jQuery example, hope it helps!
ASPX：
<head id="Head1" runat="server">
<title>Controls</title>
<script src="Scripts/jquery-1.7.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#btnAdd").click(function () {
var field = $("#field").val();
var input = "<input name='parameters' id='field' type='text' />";
var newRow = "<tr><td>" + field + "</td><td>" + input + "</td></tr>";
$('#controls').append(newRow);
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="field" type="text" />
<input id="btnAdd" type="button" value="Add" />
<table id="controls" cellpadding="10" cellspacing="10">
</table>
<asp:Button ID="btnProcess" runat="server" Text="Process" OnClick="Process" />
</div>
</form>
</body>
后面的 code
protected void Process(object sender, EventArgs e)
{
var parameters = Request.Form["parameters"];
if (parameters != null && parameters.Count() > 0)
{
//Now you have access to the textbox values,perform any additional processing
parameters.Split(',').ToList().
ForEach(p =>
{
Response.Write(p + "<br />");
});
}
}
和这里的另一个，如果你想对这种方法的server.Problem一切，当你动态地添加控件，他们消失后回来，你必须保持在的Page_Load <重新创建它们/ code>这将实质性加工添加到您的服务器，我会建议使用jQuery的选择坚持
And here's another if you want to do everything on the server.Problem with this approach is that when you adding controls dynamically they disappear on post back and you have to keep re-creating them in Page_Load which will add substantial processing to your server, I would suggest sticking with the jQuery option
ASPX：
<asp:TextBox ID="txtFieldName" runat="server"></asp:TextBox>
<asp:Button ID="btnAddControl" runat="server" Text="Add" OnClick="Add" />
<asp:Table EnableViewState="true" CellPadding="2" CellSpacing="2" BorderWidth="2" BorderStyle="Solid" GridLines="Both" ID="table"
runat="server">
<asp:TableHeaderRow>
<asp:TableHeaderCell Text="Field" />
<asp:TableHeaderCell Text="Value" />
</asp:TableHeaderRow>
</asp:Table>
<asp:Button ID="btnPost" runat="server" Text="Post" OnClick="Post" />
后面的 code：
public List<string> rows = new List<string>();
protected void Page_Load(object sender, EventArgs e)
{
if (ViewState["Rows"] != null)
{
rows = (List<string>)ViewState["Rows"];
if (rows.Count > 0)
{
foreach (var row in rows)
{
TextBox textbox = new TextBox();
textbox.Width = 300;
table.Rows.Add(GetRow(row,textbox));
}
}
}
}
protected void Add(object sender, EventArgs e)
{
string row = txtFieldName.Text;
if (!String.IsNullOrEmpty(row))
{
rows.Add(txtFieldName.Text);
TextBox textbox = new TextBox();
textbox.Width = 300;
table.Rows.Add(GetRow(row, textbox));
ViewState["Rows"] = rows;
}
}
private TableRow GetRow(string text, WebControl txtName)
{
TableRow tr = new TableRow();
TableCell cell1 = new TableCell();
cell1.Text = text;
TableCell cell2 = new TableCell();
cell2.Controls.Add(txtName);
tr.Cells.Add(cell1);
tr.Cells.Add(cell2);
return tr;
}
protected void Post(object sender, EventArgs e)
{
if (table.Rows.Count > 0)
{
System.Diagnostics.Debugger.Break();
//i=1 because we want to skip the header row
for (int i = 1; i < table.Rows.Count; i++)
{
//Examine the values and do further processing...
string field = table.Rows[i].Cells[0].Text;
string value = ((TextBox)table.Rows[i].Cells[1].Controls[0]).Text;
}
}
}
这篇关于动态添加JavaScript的控制Asp.net C＃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
