Do various things by JSON in ASP.net -3

Do various things by JSON in ASP.net -3

Bind dropdown list by JSON

Do various things by JSON in ASP.net -2

Do various things by JSON in ASP.net -2

Display records in GridView by JSON

 

Do various things by JSON in ASP.net -1

Do various things by JSON in ASP.net -1

Simply Add/Edit records by JSON 

Form Design

Export DataGridview To Excel

See the code

References:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using MySql.Data.MySqlClient;

using System.Configuration;

using System.IO;

Code for button for exporting to Excel

SaveFileDialog sfd = new SaveFileDialog();

sfd.Filter = "Excel Documents (*.xls)|*.xls";

sfd.FileName = "export.xls";

if (sfd.ShowDialog() == DialogResult.OK)

{

    //ToCsV(dataGridView1, @"c:\export.xls");

    ToCsV(dataGridView1, sfd.FileName); // Here dataGridview1 is your grid view name

} 

Function for exporting to Excel:

private void ToCsV(DataGridView dGV, string filename)

{

        string stOutput = "";

        // Export titles:

        string sHeaders = "";

        for (int j = 0; j < dGV.Columns.Count; j++)

            sHeaders = sHeaders.ToString() + Convert.ToString(dGV.Columns[j].HeaderText) + "\t";

        stOutput += sHeaders + "\r\n";

        // Export data.

        for (int i = 0; i < dGV.RowCount - 1; i++)

        {

            string stLine = "";

            for (int j = 0; j < dGV.Rows[i].Cells.Count; j++)

                stLine = stLine.ToString() + Convert.ToString(dGV.Rows[i].Cells[j].Value) + "\t";

            stOutput += stLine + "\r\n";

        }

        Encoding utf16 = Encoding.GetEncoding(1254);

        byte[] output = utf16.GetBytes(stOutput);

        FileStream fs = new FileStream(filename, FileMode.Create);

        BinaryWriter bw = new BinaryWriter(fs);

        bw.Write(output, 0, output.Length); //write the encoded file

        bw.Flush();

        bw.Close();

        fs.Close();

}

Sample Database Class

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.Data.SqlClient;

Avoid submit event Refresh in Asp.net

'Declare variables for use

    Private _refreshState As Boolean

    Private _isRefresh As Boolean

'Functions to Use

#Region " ISREFRESH "

    Protected Overrides Sub LoadViewState(ByVal savedState As Object)

        Dim AllStates As Object() = savedState

        MyBase.LoadViewState(AllStates(0))

        _refreshState = Boolean.Parse(AllStates(1))

        _isRefresh = _refreshState = Session("__ISREFRESH")

    End Sub

    Protected Overrides Function SaveViewState() As Object

        Session("__ISREFRESH") = _refreshState

        Dim AllStates() As Object = New Object(2) {}

        AllStates(0) = MyBase.SaveViewState

        AllStates(1) = Not (_refreshState)

        Return AllStates

    End Function

#End Region

'Call function in Button Click Event

Protected Sub btnLogin_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles btnLogin.Click

      If _isRefresh = True Then

            Exit Sub

      End If

End Sub

How to Save and Retrieve File in SQL Server Table

1.)  Design

Save and Retrieve File in SQL Table :
Select File To Upload :
File ID to Download :

2.) Table

  

ID FileName Extension Content 1 ShowMIS_BODRptS .PDF <Binary data> 2 a.xls .xls <Binary data> 3 test.txt .txt <Binary data> 4 test.sql .sql <Binary data> 5 ShowMIS_BODRptS .pdf <Binary data>