How to do jquery postback using C#

simple and sweet C# function dont forget attribute.

[System.Web.Services.WebMethod]
public static string GetCustomerCreditCardInfo(string accountNumber)
{
System.Data.DataTable dt = Order.GetOrderHistoryByAccountId(int.Parse(acountNumber));
return "";
}

place this text in a jquery function

$.ajax({ type: "POST", url: "PosOrderEntry.aspx/GetCustomerCreditCardInfo", data: "{accountNumber : '" + accountId + "'}", contentType: "application/json; charset=utf-8", dataType: "json",
success: function(msg) {
if (msg.d == "") {
alert('nothing'); //failure
}
alert(msg.d); //success
}
});
//notice that the accountNumber has to have the same name as the c#function argument name

Session State for C#

public static class CurrentContext

{

private static T GetFromSession(string key)

{

object obj = HttpContext.Current.Session[key];

if (obj == null)

{

return default(T);

}

return (T)obj;

}

private static void SetInSession(string key, T value)

{

if (value == null)

{

HttpContext.Current.Session.Remove(key);

}

else

{

HttpContext.Current.Session[key] = value;

}

}

private static T GetFromCache(string key)

{

object obj = HttpContext.Current.Cache[key];

if (obj == null)

{

return default(T);

}

return (T)obj;

}

private static void SetInCache(string key, T value)

{

if (value == null)

{

HttpContext.Current.Cache.Remove(key);

}

else

{

HttpContext.Current.Cache[key] = value;

}

}

public static Order CurrentOrder

{

get { return GetFromSession("CurrentOrder"); }

set { SetInSession("CurrentOrder", value); }

}

public static OrderCustomer CurrentOrderCustomer

{

get { return GetFromSession("CurrentOrderCustomer"); }

set { SetInSession("CurrentOrderCustomer", value); }

}

Forms Login C#

create admin folder protected void Login1_Authenticate(object sender, AuthenticateEventArgs e) { //if(database validates user then run this code) if (FormsAuthentication.Authenticate("admin", "pass")) FormsAuthentication.RedirectFromLoginPage("admin", true); }

<configuration>

<system.web>

<authentication mode="Forms">

<forms defaulturl="~Admin/admin.aspx" loginurl="~/default.aspx" slidingexpiration="true" timeout="20">

<credentials passwordformat="Clear">

<user name="admin" password="pass">

</user></credentials>

</forms>

</authentication>

</system.web>

<location path="admin">

<system.web>

<authorization>

<allow users="admin">

<deny users="*">

</deny></allow></authorization>

</system.web>

</location>

</configuration>

Create word with C# Open XML

http://www.iamraf.net/Articles/Creating-Word-docx-document-using-Office-Open-XML-SDK-20

Create word with C# Open XML

http://www.iamraf.net/Articles/Creating-Word-docx-document-using-Office-Open-XML-SDK-20

Create Dynamic Controls

//pnlTransferRequestOutside is only control needed on aspx page

protected void Page_Load(object sender, EventArgs e)

{

//recreate Textboxes

int count = Convert.ToInt32(ViewState["Count"]) + 1;

for (int i = 1; i < count; i++) {

CreateTextBox(i.ToString());

}

}

protected void btnAddTransfer_Click(object sender, EventArgs e)

{

if (ViewState["Count"] != null)

ViewState["Count"] = Convert.ToInt32(ViewState["Count"].ToString()) + 1;

else

ViewState["Count"] = 1;

CreateTextBox(ViewState["Count"].ToString());

}

protected void CreateTextBox(string id)

{

//create new textbox

Label lbl = new Label();

lbl.Text = "ID:";

pnlTransferRequestOutside.Controls.Add(lbl);

TextBox tb = new TextBox();

tb.ID = "tb" + id;

pnlTransferRequestOutside.Controls.Add(tb);

tb.Text = Request.Form[tb.ClientID];

RangeValidator rv = new RangeValidator();

rv.ControlToValidate = tb.ID;

rv.ErrorMessage = "Numbers Only";

rv.Type = ValidationDataType.Integer;

rv.MaximumValue = "999999999";

rv.MinimumValue = "0";

rv.SetFocusOnError = true;

pnlTransferRequestOutside.Controls.Add(rv);

}