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Bind a textbox value in a label box using c# inside a uframe

I have entered a value in text box and click the button the value should bind in a label.
The code must be in c# not in query. There is no database also.how please say the code behind in c#. It is button click event. while click the button the page should post back and bind the data how to bind a textbox value in a label box using c#. The value must bind in postback method.

easy , take a look at the below code:
<asp:TextBox Id="txt1" runat="server" />
<asp:button Id="btn1" runat="server" onClick="Button1_Click"/>
<asp:Label Id="lbl1" runat="server"/>
//in the code behind implement the Button1_Click
protected void Button1_Click (object sender, EventArgs e)
{
lbl1.Text= txt1.Text;
}

It as easy as the following:
LabelID.Text = TextBoxID.Text;
Where LabelID is the ID of your Label control and TextBoxID is the ID of your TextBox control.
You should place this code inside the button click's event.
Update
Please use for your purpose ASP.NET Web Server Controls.
<asp:TextBox ID="textBoxId" runat="server"/>
<asp:Label ID="labelId" runat="server"/>
Then you can access the values of Text property of both the above controls, like above:
labelId.Text = textBoxId.Text;

SelectedIndexChanged event of DropDownList is not fired

ASPX FILE contain DropDown as Follows:
< asp:DropDownList ID="drpDist" runat="server" CssClass="dropDownStyle" OnSelectedIndexChanged="drpDist_SelectedIndexChanged" TabIndex="6">
In ASPX.CS FILE
protected void drpDist_SelectedIndexChanged(object sender, EventArgs e)
{
}
Please Help me.I can't get why it is not working.

Use Property
AutoPostBack="True"

you need to set AutoPostBack="true"
<asp:DropDownList ID="drpDist" runat="server" AutoPostBack="true">
when you set that property as true, a postback to the server automatically occurs whenever the user changes the selection of the list

You need to set the AutoPostBack="True" property. This will make the page to postback automatically hence firing your event.

Set AutoPostBack="true"
< asp:DropDownList ID="drpDist" runat="server" AutoPostBack="true" CssClass="dropDownStyle" OnSelectedIndexChanged="drpDist_SelectedIndexChanged" TabIndex="6">

how to call DropDownList's onselectedindexchanged event from CreateUserWizard->WizardStep

I am using CreateUserWizard and added additional WizardStep for user additional details.
I am using one dropdownlist. value has been filled from DB in dropdownlist.
Now, when I will change the value in dropdownlist. I want to chekc/uncheck the one checkbox based on it's value in DB for selected dropdownlist value.
For that i want to call onselectedindexchanged event of dropdownlist.
How to fire onselectedindexchanged event?
Please help me to solve this problem?

Dont add onselectedindexchanged manually
All event for element are listed in event tab on right hand side
Your code should look like
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList>
In cs file
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
}
Important Note
Remove the ViewStateMode="Disabled" in the CreateUserWizard control

Try this.
drag a dropdownlist control on your aspx page and add selectedindexchanged event, test it properly, now cut the control and paste it inside WizardStep.
I hope it works.

How to execute a query when dropdownlist selected index changes

I have a DropDownList which is populated using a sqldatasource, i.e., from database and their is a grid view which is populated with another sqldatasource connected to using the value of dropdownlist.
But it does not execute the query dynamically. I want that whenever the value of dropdownlist changes, the grid view should update.
Code please..

ASPX code
<asp:DropDownList id="ddlCountry" AutoPostBack="True" runat="server" OnSelectedIndexChanged="ddlCountry_SelectedIndexChanged" ></asp:DropDownList>
And CS code
protected void ddlCountry_SelectedIndexChanged(object sender, EventArgs e)
{
FillYourGridviewHere();
}

<asp:DropDownList ID="DropDownList1" runat="server"
DataSourceID="SqlDataSource2" DataTextField="ssn" DataValueField="ssn"
AutoPostBack=true>
</asp:DropDownList>
This Worked. Thank You.!!

You can just write the dynamic code for populating the grid into a function and bind that function to the dropdownlist onChange event.
Say "mydropdown" is the id of your dropdownlist and "dochanges" is a function that executes your dynamic codes. So you just need to bind the dochanges function to the change event of your dropdownlist.
$('#mydropown').bind('change',function(){
dochanges(); //call the dynamic function where you update your grid
});

How do I redirect with a Drop Down List, and not a Button?

I am looking into using only a ddl to run my query, not a ddl and a Button_Click function. I am yet to find what to do. How do I do this?

In your as(p/c)x:
<asp:DropDownList runat="server"
id="ddl"
OnSelectedIndexChanged="SelectionChanged"
AutoPostBack="true">
<asp:ListItem Text="Page 1" Value="/page1.aspx" />
<asp:ListItem Text="Page 2" Value="/page2.aspx" />
</asp:DropDownList>
The "AutoPostBack" property tells ASP.NET to wire up a client-side (javascript) command that submits the form as soon as the drop down list changes, instead of waiting for a button click.
And in your codebehind, the event handler we referenced in the "OnSelectedIndexChanged" property will get fired:
protected void SelectionChanged(object sender, EventArgs e)
{
Response.Redirect(((DropDownList)sender).SelectedValue);
}

Set the AutoPostBack property to true, then hook into the OnSelectedIndexChanged event
<asp:DropDownList
id="dropDownList1"
runat="server"
AutoPostBack="true"
OnSelectedIndexChanged="dropDownList1_SelectedIndexChanged" />
Server Side
void dropDownList1_SelectedIndexChanged
(Object sender, EventArgs e) {
//run your query
}

Ensure your Drop down list has it's "AutoPostback" property set to true. This will cause the page to post back when the user selects an item from within the drop-down list. You can respond to this in your code-behind in whichever event you desire, Page_Load, or the DDL's own OnSelectedIndexChanged