Asp.net web controls problem

[JimWu]

I'd like to add designed by myself web control "TextBox" on my page.

But something wrong to appear message " Control 'ctl13' of type 'TextBox must be placed inside a form tag with runat=server. " while performing SaveImage method.

Why the TextBox control can not add to my page, but Label control do.

My code is listed as follows.

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;


public partial class AddMetaData : System.Web.UI.Page
{
System.Web.UI.WebControls.Image[] images = new System.Web.UI.WebControls.Image[5];
System.Web.UI.WebControls.Label[,] labels = new Label[5, 5];
System.Web.UI.WebControls.TextBox[,] textboxs = new System.Web.UI.WebControls.TextBox[5, 5];


protected void Page_Load(object sender, EventArgs e)
{

if (PreviousPage != null)
{
if (PreviousPage.IsCrossPagePostBack == true)
this.SaveImages();
}
}


private System.Boolean SaveImages()
{

//loop through the files uploaded
System.Web.HttpFileCollection _files = System.Web.HttpContext.Current.Request.Files;

//Message to the user
System.Text.StringBuilder _message = new System.Text.StringBuilder("Files Uploaded:<br>");
try
{
for (System.Int32 _iFile = 0; _iFile < _files.Count; _iFile++)
{
// Check to make sure the uploaded file is a jpg or gif
System.Web.HttpPostedFile _postedFile = _files[_iFile];
System.String _fileName, _fileExtension;
_fileName = System.IO.Path.GetFileName(_postedFile.FileName);
_fileExtension = System.IO.Path.GetExtension(_fileName);

//現在只先做jpeg
if ((_fileExtension == ".jpg") || (_fileExtension == ".JPG") || (_fileExtension == ".jpeg") || (_fileExtension == ".JPEG"))
{


//Save File to the proper directory
_postedFile.SaveAs(System.Web.HttpContext.Current. Request.MapPath("jpgs/") + _fileName);
//textboxs[_iFile, 0].Text = _fileName;

txtTitle.Text = _fileName;
labels[_iFile,0].Text = "Album";
labels[_iFile, 1].Text = "Name";
labels[_iFile, 2].Text = "Tag";
labels[_iFile, 3].Text = "Description";
textboxs[_iFile, 0].Text ="";
textboxs[_iFile, 1].Text = _fileName;
textboxs[_iFile, 2].Text ="";
textboxs[_iFile, 3].Text ="";

images[_iFile].ImageUrl = "./jpgs/" + _fileName;

this.Controls.Add(images[_iFile]);

this.Controls.Add(labels[_iFile, 0] );
this.Controls.Add(labels[_iFile, 1] );
this.Controls.Add(labels[_iFile, 2] );
this.Controls.Add(labels[_iFile, 3] );

this.Controls.Add(textboxs[_iFile, 0]);
this.Controls.Add(textboxs[_iFile, 1]);
this.Controls.Add(textboxs[_iFile, 2]);
this.Controls.Add(textboxs[_iFile, 3]);


_message.Append(_fileName + "<BR>");
}
else
{
if (_fileExtension != "")
{
_message.Append(_fileName + " <font color=\"red\">failed!! Only .gif and .jpg images allowed!</font> <BR>");
}
}

}
Label5.Text = _message.ToString();
return true;
}
catch (System.Exception Ex)
{
Label1.Text = Ex.Message;
return false;
}
}

#region Web Form Designer generated code

override protected void OnInit(System.EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//

for (int i = 0; i < 5; i++) {

images[i] = new Image();

for (int j = 0; j < 5; j++)
{
labels[i,j] = new Label();
textboxs[i,j] = new TextBox();

}
}


InitializeComponent();
base.OnInit(e);

}
Have any know how to solve this problem or something else to replace controls of TextBox of use.

Thank you.

Jim

[JosAH]

Greetings, you posted your question in the Articles section; it belongs in the
corresponding Forum section. I'll move it over for you.

kind regards,

Jos

[JimWu]

Thank you very much.

I have already find out the answer during the few past days.

TextBox control can not be added in Page.

Since TextBox control does not belong to Page collections, but Form collections.

Thank you for your kindly assistence.

Jim.

Greetings, you posted your question in the Articles section; it belongs in the
corresponding Forum section. I'll move it over for you.

kind regards,

Jos