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Saturday, 16 July 2016

Copy file from one folder to another in c#

using System.IO;

Copy file from Root Folder to Sub Folder

string fileName = "test.txt";
string sourcePath = @"C:\Test Folder";
string targetPath = @"C:\Test Folder\Sub Folder";

string sourceFile = Path.Combine(sourcePath, fileName);
string destFile = Path.Combine(targetPath, fileName);

if (!Directory.Exists(targetPath))
{
    Directory.CreateDirectory(targetPath);
}

File.Copy(sourceFile, destFile, true);    

Copy file from one folder to another folder

string fileName = "test.txt";
string sourcePath = @"C:\Source Folder";
string targetPath = @"C:\Destination Folder";

string sourceFile = Path.Combine(sourcePath, fileName);
string destFile = Path.Combine(targetPath, fileName);

if (!Directory.Exists(targetPath))
{
    Directory.CreateDirectory(targetPath);
}

File.Copy(sourceFile, destFile, true);    

Copy file from one directories to another directories

string fileName = "test.txt";
string sourcePath = @"C:\Source Folder";
string targetPath = @"D:\Destination Folder";

string sourceFile = Path.Combine(sourcePath, fileName);
string destFile = Path.Combine(targetPath, fileName);

if (!Directory.Exists(targetPath))
{
    Directory.CreateDirectory(targetPath);
}

File.Copy(sourceFile, destFile, true);    

Copy all files from Root Folder to Sub Folder

string sourcePath = @"C:\Test Folder";
string targetPath = @"C:\Test Folder\Sub Folder";

if (!Directory.Exists(targetPath))
{
    Directory.CreateDirectory(targetPath);
}

string[] sourcefiles = Directory.GetFiles(sourcePath);

foreach (string sourcefile in sourcefiles)
{
    string fileName = Path.GetFileName(sourcefile);
    string destFile = Path.Combine(targetPath, fileName);

    File.Copy(sourcefile, destFile, true);
}

Copy all files from one folder to another folder

string sourcePath = @"C:\Source Folder";
string targetPath = @"C:\Destination Folder";

if (!Directory.Exists(targetPath))
{
    Directory.CreateDirectory(targetPath);
}

string[] sourcefiles = Directory.GetFiles(sourcePath);

foreach (string sourcefile in sourcefiles)
{
    string fileName = Path.GetFileName(sourcefile);
    string destFile = Path.Combine(targetPath, fileName);

    File.Copy(sourcefile, destFile, true);
}

Copy all files from one directories to another directories

string sourcePath = @"C:\Source Folder";
string targetPath = @"D:\Destination Folder";

if (!Directory.Exists(targetPath))
{
    Directory.CreateDirectory(targetPath);
}

string[] sourcefiles = Directory.GetFiles(sourcePath);

foreach (string sourcefile in sourcefiles)
{
    string fileName = Path.GetFileName(sourcefile);
    string destFile = Path.Combine(targetPath, fileName);

    File.Copy(sourcefile, destFile, true);
}

Note:-

File.Copy() third parameter is Boolean. By default it’s false. Its true means overwrite the file, if same file exists in destination folder.

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Sunday, 3 July 2016

Generate serial number in GridView in ASP.net

<asp:TemplateField HeaderText="Sr.No.">
    <ItemTemplate>
       <%#Container.DataItemIndex+1 %>
    </ItemTemplate>
</asp:TemplateField>

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How to create table dynamically in asp.net

Step 1:- Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Demo.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:Button ID="btnGenTable" runat="server" Text="Generate Table" OnClick="btnGenTable_Click" />
            <br />
            <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
        </div>
    </form>
</body>
</html>

Step 2:- Default.aspx.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Demo
{
    public partial class Default: System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
            }
            else
            {
                if (Page.IsPostBack)
                {
                    if (Session["DynTable"] != null)
                        PlaceHolder1.Controls.Add(new Literal { Text = Session["DynTable"].ToString() });

                }
            }
        }

        protected DataTable DynamicTable()
        {
            DataTable dt = new DataTable();

            DataRow dr = null;

            dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));

            dt.Columns.Add(new DataColumn("Column1", typeof(string)));

            dt.Columns.Add(new DataColumn("Column2", typeof(string)));

            dt.Columns.Add(new DataColumn("Column3", typeof(string)));

            int totalRow = 5;

            for (int i = 0; i < totalRow; i++)
            {
                dr = dt.NewRow();

                dr["RowNumber"] = i + 1;

                dr["Column1"] = "Row" + i;

                dr["Column2"] = "Row" + i;

                dr["Column3"] = "Row" + i;

                dt.Rows.Add(dr);
            }
            Session["DynTable"] = dt;

            return dt;
        }

        protected void btnGenTable_Click(object sender, EventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendLine("<table border=\"1\">");

            DataTable dt = DynamicTable();

            if (dt.Rows.Count > 0)
            {
                // Table Header Name
                sb.AppendLine("<tr>");
                for (int col = 0; col < dt.Columns.Count; col++)
                {
                    sb.AppendLine("<td>" + dt.Columns[col].ColumnName + "</td>");
                }
                sb.AppendLine("</tr>");

                // Table Row details
                for (int row = 0; row < dt.Rows.Count; row++)
                {
                    sb.AppendLine("<tr>");

                    for (int col = 0; col < dt.Columns.Count; col++)
                    {
                        sb.AppendLine("<td>" + dt.Rows[row][col] + "</td>");
                    }

                    sb.AppendLine("</tr>");
                }
            }

            sb.AppendLine("</table>");

            PlaceHolder1.Controls.Add(new Literal { Text = sb.ToString() });
        }
    }
}

Note:-

Dynamically generated table loss during post back, If page participating multiple post back. 

To solve it, recreate dynamic table during each post back on page load.

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Delete existing files in ASP.Net

using System.IO;

string filePath = Request.PhysicalApplicationPath + "Download\\";
DirectoryInfo dirInfo = new DirectoryInfo(filePath);
FileInfo[] fileInfo = dirInfo.GetFiles();

foreach (FileInfo file in fileInfo)
{
    string ext = file.Extension;
    if (ext == ".txt")
    {
        file.Delete();
    }
}

Note:-

Currently deleting only text files.
Delete all files in Download folder.

foreach (FileInfo file in fileInfo)
{
    file.Delete();
}

Delete only specified file in Download folder.

foreach (FileInfo file in fileInfo)
{
    string fileName = file.Name;
    if (fileName == "abc.txt")
    {
        file.Delete();
    }
}

Or

string filePath = Server.MapPath("~/Download") + "abc.txt";
if (File.Exists(filePath))
{
    File.Delete(filePath);
}

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