Dot Net Example: June 2016

How to call a code-behind method from aspx page? Or Call Code behind method from GridView ItemTemplate Eval function

Step 1:- Server side code

public string GetFruitName(int id)

{

string strName = string.Empty;

switch (id)

{

case 1:

strName = "Mango";

break;

case 2:

strName = "Apple";

break;

case 3:

strName = "Graps";

break;

case 4:

strName = "Orange";

break;

case 5:

strName = "Pomegranate";

break;

default:

strName = "";

break;

}

return strName;

}

Step 2:- Design side code

<asp:TemplateField HeaderText="Fruit Name">

<asp:Label ID="lblFruitName" runat="server" Text='<%#GetFruitName(Convert.ToInt32(Eval("FruitId"))) %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

Step 3:- Default.aspx

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

<!DOCTYPE html>

</head>

<body>

<div>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" ClientIDMode="Static">

<asp:BoundField DataField="FruitId" HeaderText="Fruit Id" />

<asp:TemplateField HeaderText="Fruit Name">

<asp:Label ID="lblFruitName" runat="server" Text='<%#GetFruitName(Convert.ToInt32(Eval("FruitId"))) %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

</div>

</form>

</body>

</html>

Step 4:- Default.aspx.cs

using System;

using System.Collections.Generic;

using System.Data;

using System.Linq;

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)

{

GridView1.DataSource = GenerateData();

GridView1.DataBind();

}

private DataTable GenerateData()

{

DataTable dt = new DataTable();

DataRow dr = null;

dt.Columns.Add(new DataColumn("FruitId", typeof(int)));

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

int totalRow = 5;

for (int i = 1; i <= totalRow; i++)

{

dr = dt.NewRow();

dr["FruitId"] = i;

dr["FruitName"] = "";

dt.Rows.Add(dr);

}

return dt;

}

Generate four digit random number in ASP.Net Or Generate random number in ASP.Net

Random random = new Random();

string randomvalue = random.Next(1, 10000).ToString();

Note:-

If you need more than four digit, add one more “0” in highlighted digit.

Button click show confirmation message box in ASP.Net

</span>

Get Bound Field value in ASP.Net using Javascript & Server side

Step 1:- Javascript code

function Calculate() {

var GridView1 = document.getElementById("GridView1");

var sum = 0;

for (var i = 0; i < GridView1.rows.length; i++) {

// i = 0 is header row of griedview

if (i != 0) {

sum += parseInt(GridView1.rows[i].cells[4].innerText);

}

alert("Sum of " + sum);

}

</script>

Step 2:- Server side code

var sum = 0;

foreach (GridViewRow row in GridView1.Rows)

{

sum += Convert.ToInt32(row.Cells[4].Text);

}

Step 3:- Default.aspx

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

<!DOCTYPE html>

function Calculate() {

var GridView1 = document.getElementById("GridView1");

var sum = 0;

for (var i = 0; i < GridView1.rows.length; i++) {

// i = 0 is header row of griedview

if (i != 0) {

sum += parseInt(GridView1.rows[i].cells[4].innerText);

}

alert("Sum of " + sum);

}

</script>

</head>

<body>

<div>

<asp:Button ID="btnCalculate" runat="server" Text="Calculate" OnClick="btnCalculate_Click" />

<br />

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" ClientIDMode="Static">

<asp:BoundField DataField="Column1" HeaderText="Column1" />

<asp:BoundField DataField="Column2" HeaderText="Column2" />

<asp:BoundField DataField="Column3" HeaderText="Column3" />

<asp:BoundField DataField="Column4" HeaderText="Column4" />

<asp:BoundField DataField="Column5" HeaderText="Column5" />

</Columns>

</asp:GridView>

</div>

</form>

</body>

</html>

Step 4:- Default.aspx.cs

using System;

using System.Collections.Generic;

using System.Data;

using System.Linq;

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)

{

btnCalculate.Attributes.Add("onclick", "return Calculate();");

GridView1.DataSource = GenerateData();

GridView1.DataBind();

}

private DataTable GenerateData()

{

DataTable dt = new DataTable();

DataRow dr = null;

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

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

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

dt.Columns.Add(new DataColumn("Column4", typeof(string)));

dt.Columns.Add(new DataColumn("Column5", typeof(string)));

int totalRow = 25;

for (int i = 0; i < totalRow; i++)

{

dr = dt.NewRow();

dr["Column1"] = i + 1;

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

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

dr["Column4"] = DateTime.Now.ToString("dd/MM/yyyy hh:mm:ss:ms tt");

dr["Column5"] = 5000 / (i + 2);

dt.Rows.Add(dr);

}

return dt;

}

protected void btnCalculate_Click(object sender, EventArgs e)

{

var sum = 0;

foreach (GridViewRow row in GridView1.Rows)

{

sum += Convert.ToInt32(row.Cells[4].Text);

}

DisplayMessage("Sum of " + sum);

}

protected void DisplayMessage(string strMsg)

{

strMsg = strMsg.Replace("\r\n", "\\n");

strMsg = strMsg.Replace("\n", "\\n");

strMsg = strMsg.Replace("'", "");

string scriptString = @"<script language=""JavaScript"">";

scriptString += "alert('" + strMsg + "');";

scriptString += "</script>";

ClientScript.RegisterStartupScript(this.GetType(), "Startup", scriptString);

}

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Saturday, 25 June 2016

How to call a code-behind method from aspx page? Or Call Code behind method from GridView ItemTemplate Eval function

Generate four digit random number in ASP.Net Or Generate random number in ASP.Net

Button click show confirmation message box in ASP.Net

Get Bound Field value in ASP.Net using Javascript & Server side