Tuesday, December 18, 2007

Javascript Calling from Page behind in asp.net

Its a sample javascript which is called from page behind

In .Aspx File

<head runat="server">
<title>Untitled Page</title>
<script language="javascript" type="text/javascript">

function IsChecked(chkObj1,strText,strFormName)
{
if(strText == "")
return;

strText = strText.replace( '<b>', '');
strText = strText.replace( '</b>', '');

var chkObj = document.getElementById(chkObj1);
var txtObj = document.getElementById('<%= TextBox1.ClientID %>');
if(chkObj.checked == true) //For Adding Item
{
var iFormFound = 0;
var iTextFound = 0;
iFormFound = txtObj.value.search(strFormName);
if(iFormFound == -1)
{
//If Form Name is Not There Append it
if(txtObj.value.length == 0)
txtObj.value = txtObj.value + strFormName;
else
txtObj.value = txtObj.value + "\n\n" + strFormName;
}

//If Text Not There Append it After Form Name
iTextFound = txtObj.value.search(strText);
if(iTextFound == -1)
{
if(txtObj.value.length == 0)
{
//txtObj.value = strText;
var iIndexOf = txtObj.value.indexOf(strFormName);
iIndexOf = iIndexOf + strFormName.length;
//alert(iIndexOf);
var strBefore = txtObj.value.substr(0,iIndexOf);
var strAfter = txtObj.value.substr(iIndexOf,txtObj.value.length);
txtObj.value = strBefore + strText + strAfter;
//alert(strBefore + " => " + strText + " => " + strAfter + " => " + txtObj.value);
}
else
{
//txtObj.value = txtObj.value + "\n" + strText;
var iIndexOf = txtObj.value.indexOf(strFormName);
iIndexOf = iIndexOf + strFormName.length;
//alert(iIndexOf);
var strBefore = txtObj.value.substr(0,iIndexOf);
var strAfter = txtObj.value.substr(iIndexOf,txtObj.value.length);
txtObj.value = strBefore + "\n" + strText + strAfter;
//alert(strBefore + " => " + strText + " => " + strAfter + " => " + txtObj.value);
}
}

}
else //For Removing Item
{
var iTextFound = 0;
iTextFound = txtObj.value.search(strText);
if(iTextFound != -1)
{
txtObj.value = txtObj.value.replace( strText + "\r\n", '');
//For Last Element (Special Case)
if(txtObj.value.search(strText) != -1)
{
txtObj.value = txtObj.value.replace( strText, '');
txtObj.value = txtObj.value.substr(0,txtObj.value.length - 2);
}
}
}
}

</script>
</head>



In .Aspx.Cs File (asp.net Code behind file)

protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
ApplyJavascript();
}
}

private void ApplyJavascript()
{
CheckBox1.Attributes.Add("onClick", "IsChecked('" + CheckBox1.ClientID.ToString() + "','Group1','Checkbox1')");
CheckBox2.Attributes.Add("onClick", "IsChecked('" + CheckBox2.ClientID.ToString() + "','Group1','Checkbox2')");
CheckBox3.Attributes.Add("onClick", "IsChecked('" + CheckBox3.ClientID.ToString() + "','Group1','Checkbox3')");

CheckBox4.Attributes.Add("onClick", "IsChecked('" + CheckBox4.ClientID.ToString() + "','Group2','Checkbox4')");
CheckBox5.Attributes.Add("onClick", "IsChecked('" + CheckBox5.ClientID.ToString() + "','Group2','Checkbox5')");
CheckBox6.Attributes.Add("onClick", "IsChecked('" + CheckBox6.ClientID.ToString() + "','Group2','Checkbox6')");
CheckBox7.Attributes.Add("onClick", "IsChecked('" + CheckBox7.ClientID.ToString() + "','Group2','Checkbox7')");
}

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