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This is the cs code:
using System;
using System.Data;
using System.Configuration;
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.IO;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack == true)
{
AddRows();
}
}
private void AddRows()
{
try
{
if (hidCurRow.Value != "" && hidCurRow.Value != "0")
{
DecreaseCount();
}
else if (hidCurRow.Value == "")
{
IncreaseCount();
}
for (int count = 1; count < tblMin.Rows.Count; count++)
{
tblMin.Rows.RemoveAt(1);
}
int maxRows = Convert.ToInt32(hidMax.Value);
string[] arrRows = hidRow.Value.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
for (int count = 1; count <= maxRows; count++)
{
Boolean isAdd = false;
for (int incount = 0; incount < arrRows.Length; incount++)
{
if (arrRows[incount] == count.ToString())
{
isAdd = true;
break;
}
}
if (isAdd == true)
{
TableRow tr = new TableRow();
TableCell tcfu = new TableCell();
FileUpload fup = new FileUpload();
fup.ID = "fu" + count.ToString();
tcfu.Controls.Add(fup);
TableCell tcbtn = new TableCell();
Button bt = new Button();
bt.ID = "btn" + count.ToString();
bt.Text = "Remove";
bt.Attributes.Add("onclick", "DecreaseRow('" + count.ToString() + "');");
tcbtn.Controls.Add(bt);
tr.Cells.Add(tcfu);
tr.Cells.Add(tcbtn);
tblMin.Rows.Add(tr);
}
}
}
catch
{
}
}
private void IncreaseCount()
{
string strVal = hidMax.Value;
if (strVal != "")
{
int iMax = Convert.ToInt32(strVal);
iMax = iMax + 1;
hidMax.Value = iMax.ToString();
if (hidRow.Value != "")
{
hidRow.Value = hidRow.Value + "," + iMax.ToString();
}
else
{
hidRow.Value = iMax.ToString();
}
}
}
private void DecreaseCount()
{
string strCurRow = hidCurRow.Value;
string[] arrRows = hidRow.Value.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
hidRow.Value = "";
for (int count = 0; count < arrRows.Length; count++)
{
if (arrRows[count] != strCurRow)
{
if (hidRow.Value == "")
{
hidRow.Value = arrRows[count];
}
else
{
hidRow.Value = hidRow.Value + "," + arrRows[count];
}
}
}
}
protected void btnAdd_Click(object sender, EventArgs e)
{
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (hidRow.Value != "")
{
string[] strVal = hidRow.Value.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
for (int count = 0; count < strVal.Length; count++)
{
FileUpload fup = new FileUpload();
fup = (FileUpload)tblMin.FindControl("fu" + strVal[count]);
if (fup != null)
{
if (fup.PostedFile != null && fup.FileName != "")
{
fup.SaveAs(Server.MapPath("MyFiles") + "\\" + Path.GetFileName(fup.FileName));
}
}
}
}
}
}
When, we run the Apllication, result will be:
Image 1.
Here, user can add many upload controls by clicking on Add button and even he can remove the upload controls by clicking on Remove button.
Image 2.