Health monitoring

Health monitoring in the Web.config file.



This is nice feature in the dotnet frame work 3.5


it will automatically write the event log, When you will not handle the exception in the application,


<system.web>
<healthMonitoring enabled="true"></healthMonitoring>
</system.web>

Calling method from one user control from other usercontrol with out using property.

Take this scenorio, i have button and event in the first user control.

and i have label in the other usercontrol.

when i click on the button have to assign some value for label of other usercontrol with

out using the property


Step 1:

create first user control with following control and method.

<asp:Button ID="btnSubmit" onclick="btnSubmit_Click" runat="server" Text="Submit" />

public void btnSubmit_Click(object sender, EventArgs e)
{
test2 t2 = (test2)Page.FindControl("test2");

t2.callBTN(sender, e);

}
step 2:


create second user control with label with assigning value.

<asp:Label ID="lbltest" runat="server"></asp:Label>


public void callBTN(object sender, EventArgs e)
{
lbltest.Text = "DDDD";
}

Enabling the zoom in and zoom out facility for image using Seadragon control in ajax.

I have come across new control in ajax zooming and zoom out for image. it's quite very
simple to implement this functionality.. it's nice feature thanks to Ajax team.



Step 1:

Create one xml file with the following attributes with tag. these are the attribute and tag will describe the functionality.


<Image TileSize="256" Overlap="1" Format="png" ServerFormat="Default">
<Size Width="1024" Height="768"/>
</Image>

Step 2:


create css class with image.


step 3:


<ajaxToolkit:Seadragon ID="Seadragon"
runat="server"
SourceUrl="sample.xml"> //Step1
CssClass="seadragon" //step 2
<ajaxToolkit:Seadragon>

Showing context menu in the ultrawebgrid using javacript.

Showing context menu in the ultrawebgrid using javacript.

step1:

Create ultrawebgrid with Rowselection.(if not choose selected row property getActiveRow method will not work)

step2:

create web menu with property setting of Popupmenu.

step3:

Calling showmenu function from gridcell click of ultrawebgrid.

step4:

function showmenu(objGrid,objGridid,button)
{

var grid = igtbl_getGridById(objGrid);
if(grid.getActiveRow()!=null)
{
if(button==2)
{
igmenu_showMenu('uwmContextmenu',event);
return true;
}
}
else
{
alert("Please select atleast one row");
return false;
}
}

opening Infragistics webdialogwindow using javascript.

opening Infragistics webdialogwindow using javascript.

var dialogObject = $find("WebDialogWindowSchedule");

dialogObject.get_contentPane().set_contentUrl(TargetURL);

dialogObject._header.setCaptionText("Welcome");

dialogObject.show();


In our project we have to give option like. when ever click on the context menu.

have to show the webdialog window.

While loading have to hide the webdialogwindow. only when we click on the context menu

have to show the dialog. for that have to make width and height 0. when we click on the

context menu have to assign the widht and height.

We have come across some performance issue in the ultrawebgrid.

Please follow the below rules while doing code with infragistics.


1). Don't add dynamic controls in the Initialize row of the ultrawebgrid.


2). Use PreRender event of ultrawebgrid adding dynamic controls.


3). declare all the styles and properties in the code behind.


Explain.

if you declare properties of ultrawebgrid in the aspx. it will take more time to render. so always try to put in the codebehind.

how to restrict back button using asp.net.

We have come across the problem while clicking on the back button in the browser.

we shouldn't load the page again when we click on the back button.

Below code it will hide the back button. This is also one of the security leavl have to

follow in the transaction pages.

Response.Buffer = true;
Response.CacheControl = "no-cache";
Response.Cache.SetNoStore();
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetExpires(DateTime.Now.AddDays(-1));

Downcasting in OOPS

Assinging the parent class to child class this is called downcasting.

public class Class1
{
public string getValue()
{
return "sd";
}
}

public class class3 : Class1
{
public string GetValue1()
{

class3 cl =(class3) new Class1();
return cl.getValue();


}
}

Upcasting in OOPS

assigning the child class to the parent class that is called the Upcasting


public abstract class Class1
{
public string getValue()
{
return "sd";
}
}

public class class3 : Class1
{
public string GetValue1()
{
Class1 SS =new class3();
return SS.getValue();
}
}

Reading and adding controls dynamically for templated Column in ultrawebgrid.

I have come across performance issue when we add the controls in the initialize row of ulrtrawebgrid. so i have decided to move in to prerender controls.

After moving the controls in to prerender performance got increased.

void uwgProduct_PreRender(object sender, EventArgs e)
{
TemplatedColumn col = (TemplatedColumn)uwgProduct.DisplayLayout.Grid.Bands[0].Columns.FromKey("HeaderCheck");
TemplatedColumn colChild = (TemplatedColumn)uwgProduct.DisplayLayout.Grid.Bands[1].Columns.FromKey("ChildCheck");
int rowTotalCount = uwgProduct.Rows.Count;
///Header////
for (int rowcount = 0; rowcount <>
{

CellItem objcellITem = (CellItem)col.CellItems[rowcount];
HtmlInputCheckBox htmlCheck = new HtmlInputCheckBox();
htmlCheck.Attributes.Add("onclick", "selectEachParent(event,this.value)");
htmlCheck.Attributes.Add("id", Convert.ToString(objcellITem.Value));
htmlCheck.Value = Convert.ToString(objcellITem.Value);
objcellITem.Controls.Add(htmlCheck);
}
////Header/////

////Child Display////////
int childTotalCount = colChild.CellItems.Count;
for (int childCount = 0; childCount <>
{
CellItem objcellITem = (CellItem)col.CellItems[rowIndex];
CellItem objcellITemChild = (CellItem)colChild.CellItems[childCount];
HtmlInputCheckBox htmlCheckChild = new HtmlInputCheckBox();
htmlCheckChild.Attributes.Add("onclick", "UnselectParent(event,this.value)");
htmlCheckChild.ID = Convert.ToString(objcellITem.Value) + "_" + Convert.ToString(objcellITemChild.Value);
htmlCheckChild.Value = Convert.ToString(objcellITem.Value) + "_" + Convert.ToString(objcellITemChild.Value);
objcellITemChild.Controls.Add(htmlCheckChild);
}
////End Child Display////////
}

Infragistics WebDataGrid validation.

In our project we need to do validation for webdatagrid using javascript.

var Gkey,GIndex;
function EnterEditModeValidate(objGrid,Obj1Edited)
{
Gkey = Obj1Edited._cell._column._key;
GIndex = Obj1Edited.getCell().get_row()._index;
}
function ExitingEditValidate(sender,evntArgs)
{
//var index=sender.get_columns().get_columnFromKey(Gkey).get_index();
//var value=sender.get_rows().get_row(GIndex).get_cell(index).get_value();
var innT = document.getElementById("wdgProductList_ed0");
var iChars = "!@#$%^&*()+=-[]\\\;,./{}|\":<>?~_";
if(innT!=null)
{
var sValue = innT.children[0].value;
if(Gkey=="ShipAddress")
{
if(sValue=="")
{
alert("Please enter the value");
evntArgs.set_cancel(true);
}
if(sValue.length > 40)
{
alert("Charecters should be below 40");
evntArgs.set_cancel(true);
}
for (var count = 0; count <>
{
if (iChars.indexOf(sValue.charAt(count)) != -1)
{
alert ("Your string has special characters. \nThese are not allowed.");
evntArgs.set_cancel(true);
}
}
}
}
}

Adding controls in to ultrawebgrid using PreRenderMethod.

TemplatedColumn col = (TemplatedColumn)uwgProduct.DisplayLayout.Grid.Bands[0].Columns.FromKey("HeaderCheck");
int rowTotalCount = uwgProduct.Rows.Count;
for (int rowcount = 0; rowcount < rowTotalCount; rowcount++)
{
CellItem objcellITem = (CellItem)col.CellItems[rowcount];
DropDownList drp = new DropDownList();
drp.Items.Add(new ListItem("test", "ss"));
drp.ID = "dd";
objcellITem.Controls.Add(drp);
}

Special Character Validation

var iChars = "!@#$%^&*()+=-[]\\\';,./{}|\":<>?~_";

for (var i = 0; i < objGridCellValue.length; i++)
{
if (iChars.indexOf(objGridCellValue.charAt(i)) != -1) {
alert ("Your string has special characters. \nThese are not allowed.");
return false;
}
}

Date Compare Function

function DateFormat(dt)
{
var dtformat = new Date(dt)
return dt.format("MM/dd/yyyy");
}

function DateCompare(fromDt,toDt)
{
var arrFromdt=fromDt.split("/");
var arrTodt=toDt.split("/");
var fromDt=new Date(arrFromdt[2],replaceDt(arrFromdt[0]),replaceDt(arrFromdt[1]));
var toDt=new Date(arrTodt[2],replaceDt(arrTodt[0]),replaceDt(arrTodt[1]));
if(fromDt<=toDt)
{
return "1";
}
else
{
return "0";
}
}
function replaceDt(replaceValue)
{
if(parseInt(replaceValue)<10)
{
return replaceValue.replace('0','');
}
else
{
return replaceValue;
}
}

Asp DataGrid with Editable cell with out Postback using Javascript

This is created for one of my friend. he want's in his project. so i thought of sharing with everyone am writing in my blog.

step 1:

create asp grid control with binding dummy value.

step 2:

<asp:GridView ID="grView" runat="server" AutoGenerateColumns="false"

onprerender="grView_PreRender">

<Columns>

<asp:TemplateField>

<ItemTemplate>

<div id="lblDiv" runat="server">

<asp:Label ID="lblID" runat="server" Text='<%# Eval("Empid") %>'></asp:Label>

</div>

<div id="txtDiv" style="display:none" runat="server">

<asp:TextBox ID="txtID" runat="server" Text='<%# Eval("Empid") %>'></asp:TextBox>

</div>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

step 3:

DataTable DT = new DataTable();

DataColumn dc1 = new DataColumn("Empid");

DataColumn dc2 = new DataColumn("Empname");

DataColumn dc3 = new DataColumn("EmpSalary");

DataColumn dc4 = new DataColumn("EmpAddress");

DT.Columns.Add(dc1);

DT.Columns.Add(dc2);

DT.Columns.Add(dc3);

DT.Columns.Add(dc4);

DataRow DR;

for (int i = 0; i <>

{

DR = DT.NewRow();

DR["Empid"] = i.ToString();

DR["Empname"] = "Bala";

DR["Empid"] = "Salary";

DR["Empid"] = "Address";

DT.Rows.Add(DR);

}

grView.DataSource = DT;

grView.DataBind();

step 4:

Calling javascript for the cell through.

protected void grView_PreRender(object sender, EventArgs e)

{

foreach (GridViewRow dr in grView.Rows)

{

Label lbl = (Label)dr.FindControl("lblID");

lbl.ID = "lblID";

lbl.Attributes.Add("onclick", "javascript:lbltoTxt(this)");

TextBox txt = (TextBox)dr.FindControl("txtID");

txt.Attributes.Add("onblur", "javascript:txttoLbl(this)");

}

}

Step 5:

<script language="javascript">

function lbltoTxt(obj)

{

var divtxtObj = document.getElementById(obj.id.replace('lblID', 'txtDiv'));

var txtObj = document.getElementById(obj.id.replace('lblID', 'txtID'));

if (divtxtObj != null)

{

if (divtxtObj.style.display == "none")

{

divtxtObj.style.display = "block";

txtObj.focus();

}

}

var divlblObj = document.getElementById(obj.id.replace('lblID', 'lblDiv'));

if (divlblObj != null)

{

if (divlblObj != null)

{

divlblObj.style.display = "none"

}

}

}

function txttoLbl(obj) {

var divlblObj = document.getElementById(obj.id.replace('txtID', 'lblDiv'));

var lblObj = document.getElementById(obj.id.replace('txtID', 'lblID'));

if (divlblObj != null) {

if (divlblObj.style.display == "none") {

divlblObj.style.display = "block";

lblObj.innerText = obj.value;

}

}

var divtxtObj = document.getElementById(obj.id.replace('txtID', 'txtDiv'));

if (divtxtObj != null) {

if (divtxtObj != null) {

divtxtObj.style.display = "none"

}

}

}

</script>

What is the use of "Canvas" Controls?????

Canvas is one of the layout control for the silverlight. This is just like container will contain the controls.

In silverlight wright now we have three layout controls. The layout types are as given below.

1)Canvas.

2)StackPanel.

3)Grid.

My first feel with Silverlight

first of all have to say thanks to microsoft to developing this kind of product.

I have started learning about the silverlight. it's nearly nice to see in the browser with rich user experience. Really interesting to learn all new controls and new way of approuch. This is really very good treat for dotnet developer.

Let's start learning with next generation technology.

javascript listbox problem

just thought of sharing this info with everyone. I am writing in my blog.

Every one no about list box control in the asp.net controls. I have tried to write javascript for selected value when enabled the multiselection for the control. In this situation am unable to get the selected value index correctly. it's coming differentyly.. post me if you know the answer..

To fire onclick event automatically on page load using Javascript

if(navigator.appName !="Microsoft Internet Explorer")

{
HTMLElement.prototype.click = function()

{
var evt = this.ownerDocument.createEvent('MouseEvents');
evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
this.dispatchEvent(evt);
}

}

Avoid Special Character using Javascript with Regular Expression

javascript validation for special charcter.

function checkSpecial(obj,objEvent)

{

var specialChar = "^[A-Za-z0-9_]+$" //regular expression defining a 5 digit number

var objVal = obj.value;

var objVallen = obj.value.length;

if (objVal != "")

{

if (objVal.search(specialChar) == -1) //if match failed

{

if (objEvent == "keyup") {

if (objVallen > 1) {

obj.value = objVal.substring(0, parseInt(objVallen) - 1);

}

else {

obj.value = "";

}

}

else {

obj.value = "";

}

alert("Invalid character");

obj.focus();

}

}

}