就是由用户输入需要<input type=file runat=server/>的个数,实现指定个数的多文件上传的问题,还要对各个控件命名为不同的ID,以便在服务器函数上实现对上传文件属性的操作。
自己曾写如下代码,但服务器端找不到good2这个控件,请问有什么方法可以实现功能吗?
<script language="c#" runat="server">
int i=3;
public void aaa(object src,EventArgs e)
{i=Convert.ToInt32(t1.Text);
}
public void aa(object src,EventArgs e)
{while (i>0)
{string str;
string id;
id=i.ToString();
str="<input type=text value=good runat=server "+"id=good"+id+" />";
Response.Write(str);
i=i-1;
}
l1.Text=good2.Value.ToString();
}
</script>
<body>
<form runat="server" method="post">
<asp:label ID="l1" runat="server"/>
<asp:textbox ID="t1" runat="server" Width="23"/>
<asp:button Text="aaa" runat="server" OnClick="aaa"/>
<asp:button Text="aa" runat="server" OnClick="aa"/>
</form>
自己曾写如下代码,但服务器端找不到good2这个控件,请问有什么方法可以实现功能吗?
<script language="c#" runat="server">
int i=3;
public void aaa(object src,EventArgs e)
{i=Convert.ToInt32(t1.Text);
}
public void aa(object src,EventArgs e)
{while (i>0)
{string str;
string id;
id=i.ToString();
str="<input type=text value=good runat=server "+"id=good"+id+" />";
Response.Write(str);
i=i-1;
}
l1.Text=good2.Value.ToString();
}
</script>
<body>
<form runat="server" method="post">
<asp:label ID="l1" runat="server"/>
<asp:textbox ID="t1" runat="server" Width="23"/>
<asp:button Text="aaa" runat="server" OnClick="aaa"/>
<asp:button Text="aa" runat="server" OnClick="aa"/>
</form>
2,在后台写上如下代码:
Dim DDL As New DropDownList
PlaceHolder1.Controls.Clear()PlaceHolder1.Controls.Add(DDL)如此类推
<FONT face="宋体">
<P>
<asp:PlaceHolder id="PlaceHolder1" runat="server"></asp:PlaceHolder></P>
<P>添加
<asp:TextBox id="TextBox1" runat="server"></asp:TextBox>个上传控件</P>
<P>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button></P>
</FONT>
</form>
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim f As HtmlInputFile
Dim l As Literal
Dim i As Integer
For i = 0 To System.Convert.ToInt16(TextBox1.Text) - 1 f = New HtmlInputFile
f.ID = "inputfile" & i
PlaceHolder1.Controls.Add(f) l = New Literal
l.Text = "<br>"
PlaceHolder1.Controls.Add(l) Next
End Sub