|
Hi,
I have a gridview which contain dropdownlist in every row. And there is a Save button in that page. I want to save the dropdownlist's value on clicking on the save button. But I am getting an error "Object reference not set to an instance of an object".
Please look at the code I am using:
foreach (GridViewRow rec in this.gvsqldesc.Controls[0].Controls)
{
DropDownList ddlval = new DropDownList();
ddlval = (DropDownList)rec.FindControl("ddlvalidation");
string str = ddlval.SelectedItem.Text;
}
Thanks & Regards
Mishra
|
|
|
|
|
Ballita wrote: ddlval = (DropDownList)rec.FindControl("ddlvalidation");
have you checked that above line find the dropwdownlist or return Null value?
best regard
pAthAn
please don't forget to vote on the post that helped you.
|
|
|
|
|
It is returning null value.
Thanks & Regards
Mishra
|
|
|
|
|
Ballita wrote: foreach (GridViewRow rec in this.gvsqldesc.Controls[0].Controls)
try this and check out again
foreach(GridViewRow rec in this.gvsqldesc.Rows)
BesT regaRD
pathan
please don't forget to vote on the post that helped you.
|
|
|
|
|
Hey, I have tried this one also. It is not returning null but it is not fetching the values.
Thanks & Regards
Mishra
|
|
|
|
|
Ballita wrote: ddlval.SelectedItem.Text;
ddlval.SelectedValue;
bEst Regard
pAthaN
please don't forget to vote on the post that helped you.
|
|
|
|
|
Try something like this:
foreach (GridViewRow rec in this.gvsqldesc.Rows)
{
string str = (DropDownList)rec.FindControl("ddlvalidation").SelectedItem.Text;
}
Here am assuming that the name of you gridview is 'gvsqldesc'.
All the Best.
|
|
|
|
|
Hi all,
i have developed my application using Asp.Net2.0 and Sql Server2005..
my application is running successfully in my local machine, but when i upload my application to the server i am getting the following error...
Server Error in '/Modules' Application.
--------------------------------------------------------------------------------
Invalid value for key 'attachdbfilename'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentException: Invalid value for key 'attachdbfilename'.
Source Error:
The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:
1. Add a "Debug=true" directive at the top of the file that generated the error. Example:
<%@ Page Language="C#" Debug="true" %>
or:
2) Add the following section to the configuration file of your application:
<configuration>
<system.web>
<compilation debug="true">
Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.
Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.
Stack Trace:
[ArgumentException: Invalid value for key 'attachdbfilename'.]
Login.imgbtnSubmit_Click(Object sender, ImageClickEventArgs e) +302
System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e) +105
System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String eventArgument) +115
System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832
how to fix this error?????????
|
|
|
|
|
do some modification in web.config file..
i.e change debug = true like below tag.
<compilation debug="true">
suchitamanandhar@hotmail.com
|
|
|
|
|
i need to display a timer for the elapsed time in aspx
or if I can use any property that shows if the user has been idle for 30 mins to ask him if he wants to continue or to log out.
BiG RaLpH
|
|
|
|
|
You can set a timer in javascript. That's the only way to do anything dynamic in a web page, as that's all that runs on the client.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
|
|
|
|
|
ok how can i display it in a label control?
BiG RaLpH
|
|
|
|
|
You'd probably just use a div or somethng, so it's not messy. Use document.getElementById to find your div, and set it's text. This all happens in javascript.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
|
|
|
|
|
Hi all,
I need to assign javascript varaible to codebehind variable on before window.location.reload.
Is there any way???
Thanks in advance...
|
|
|
|
|
Depends, in what directon ? You can write the value in your codebehind, so that it's passed to javascript as a variable definition. To go in the opposite direction, you should put a hidden field on your page, set it's value in javascript, and grab it out of your code behind. But, again, no postback occurs if you call window.location.reload. Two people have explained this to you already. There is no postback, and so any javascript values are lost.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
|
|
|
|
|
Thank you sir, but I know they have explained me but its not working. Here is the javascript function:
function ActiveTabChanged(sender, e)
{
var mytool_array=sender.get_activeTab().get_id().split("_");
document.getElementById("<%=htxtQueryStringValues.ClientID%>").value = "fromtab=true&tab=" +mytool_array[4] +"&sheet=" +sender.get_activeTab().get_headerText() ;
alert(document.getElementById("<%=htxtQueryStringValues.ClientID%>").value);
window.location.reload();
}
And on Page Load I get the value of hidden textbox values as blank....
Please tell me Is there anything I am doing wrong in above code???
|
|
|
|
|
I'm not sure how many attempts it will take before you actually understand what you've been told over and over.
ASP.NET 2.0 wrote: window.location.reload();
This does NOT do a postback. Therefore all your javascript values are lost. The page lifecycle restarts as if the last request occurs. A postback does not occur. A postback does not occur. A postback does NOT occur.
So, as you've been told, you need to initiate a postback, which you can do by calling click on a button which posts back, or by working out the javascrpt method to call directly.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
|
|
|
|
|
May i know what is the difference between State server and SQL server modes
and also about Inproc? In which scenarios they are used?
Tell me in which scenarios they are used?
Thanks in advance,
pavan...
|
|
|
|
|
pavanteja wrote: Inproc
Stores in the memory. If no session mode is specified, this will be default
pavanteja wrote: State server
Stores session state in another process called ASP.NET state service. Ensure the session availability after restarting the webapplication.
pavanteja wrote: SQL server modes
Stores in SQL Server database.
Check this[^] article to get an idea about how to choose the best method
|
|
|
|
|
that is ok with me........But may i know what is difference between state server and SQL server.........In wat cases they use......I mean the need?
pavan...
|
|
|
|
|
Please go through the link I have given. It explains that in last section
|
|
|
|
|
sorry.....I dont find any link in ur reply...........
pavan...
|
|
|
|
|
|
Hi,
I am Using a List<city> to store the data retrived from database...
My code goes as this
Service Layer Method:
public List<city> GetCities()
{
DataSet ds= cdb.GetCities();
List<city> city = new List<city>();
foreach (DataRow row in ds.Tables[0].Rows)
{
city.Add(new City(row["city_id"].ToString(), row["city_name"].ToString(), row["state_id"].ToString(), row["city_classification_id"].ToString()));
}
return city;
}
In Application Layer: I am Caliing the method as below
GridView1.DataSource = cs.GetCities();
GridView1.DataBind();
It works fine but ....
The Columns are not coming in the same order as in Database i.e... CityID, CityName, StateID, cityClassificationID.
The column order comes in as cityClassificationID,CityId, CityName, StateID.
But I want them in the same Order i.e CityID, CityName, StateID, CityClassificationID...
How to accomplish this....![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
Sangram
(A battle with self)
Life is simple, we are the ones makes the living difficult
|
|
|
|
|
Turn off auto columns and define them yourself in the order you want.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
