ViewState Example in C# , Hidden Example in ascx,javascipt

 

View State:

<table>

<tr>

<td>ViewState Data:</td><td><b><asp:Label ID="lblString" runat="server"/></b></td>

</tr>

<tr><td></td><td> <asp:Button ID="btnClick" runat="server" Text="Get ViewState Data"

onclick="btnClick_Click"/></td></tr>

</table>

protected void Page_Load(object sender, EventArgs e)

{

if(!IsPostBack)

{

string str = "Welcome to Aspdotnet-Suresh Site";

if(ViewState["SampleText"]==null)

{

ViewState["SampleText"] = str;

}

}

}

protected void btnClick_Click(object sender, EventArgs e)

{

lblString.Text = ViewState["SampleText"].ToString();

}

output:

http://www.aspdotnet-suresh.com/2012/11/viewstate-in-aspnet-with-example-in-c.html

Hiddenfield:

Examlpe1:

javascript:

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function SetHdnField() {
            var x = document.getElementById('<%= hdnSomeField.ClientID %>');
            x.value = 'hi';
            return false;
        }

aspx:

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<asp:HiddenField runat="server" ID="hdnSomeField" />
   <br />
   <asp:Button runat="server" ID="btnSetValue" Text="Set Value" OnClientClick="return SetHdnField();" />

Example2:

view plainprint?

1. Function test()  
2. {  
3.   int i=10;  
4.   var hiddentest = '';  
5. document.getElementById('<%= hiddentest.ClientID%>').value = i;  
6.  }  

Default.aspx

view plainprint?

1. <asp:HiddelFiled runat="server" id="test"></asp:Hiddenfield>  
2. <asp:textbox runat="server" id="eletext"></asp:textbox>  

The id of the hidden field is used to assign the JavaScript variable value

Code behind Page(.cs):

view plainprint?

1. protected void Page_Load(object sender, EventArgs e)  
2. {  
3. eletext.text=test.value;   
4. }