I have added a ListView to a web form and this code works when the data columns in the bound dataset have values:
<asp:ListView ID="picturesListView" runat="server"
GroupPlaceholderID="groupsGoHere"
ItemPlaceholderID="itemsGoHere"
[code]...
What's your opinion of the following job interview question?In the requirement it never mentions about to have classic ASP experience.
But the question is "What are the differences between ADO.NET DataSet and ADO Record Set?".
I have a dataset that comprises of multiple tables (about 20) linked together with constraints to reflect the relational database. My question(s):
1) Will having multiple tables affect performance? I'm asking this as there are often times I would not need to get data for all the tables, but only for specific tables.
2) If it does affect performance, would breaking up the tables into their own datasets be the best solution. It seems to me that by doing that, you would lose the ability to apply constraints among tables and tables that might exist in multiple datasets will be subjected to replication.
I would like to have everything in one dataset as I get a view of the related tables and their relationships and also because the Fill method allow me to fill tables, maintaining the hierarchy of the data, but performance is still a key factor.
I have two datasets, one is populated from a SQL Database on my server, the other is populated from an XML file passed from the client server.Both datasets are identical in structure (and potentially the same in data as well)hat I need to be able to do is as follows:-Compare Dataset1 against Dataset2 and record which rows are missing from Dataset2 (based on 2 primary fields)Compare Dataset2 against Dataset1 and record which rows are missing from Dataset1 (based on 2 primary fields)Compare Dataset1 against Dataset2 and record any rows which are different ((based on 2 primary fields always being the same and 3 fields being potentially different)
View 2 RepliesI select few columns from table A in dataset. Example "EMP_ID","Name","Address","Phone_Number". I want to save data in this dataset into some other table B.
I want to save data from dataset into table B. But i want to have following functionality
1. Before saving a record from dataset to table B if that record if previously present in table B, if yes then check if any value are different, if yes then update that record with the record from dataset, if all the values are same then leave the records as is.
2. If the record is not present in table B then insert it new records in table B from dataset.
Is there any efficient way to implement in .NET C#.
I'm just testing a simple databind expression with:
<div>
Now: <%# DateTime.Now.ToString()%>
</div>
According to MSDN:
[URL]
literal text <%# data-binding expression %>
should work.
When I compile, it's OK but I got a blank instead of Now DateTime.
I'll use Customer and Addresses as an example rather than explain my real objects. Say I have a repeater bound to a collection of Customers and one of the properties of Customer is an array of addresses. How do I bind to the addresses property? I don't even need to display this information I just want to use it in the Repeaters ItemDataBound event. So I tried to bind a hiddenField to the addresses property but all I get for every customer in the hiddenfields value is an empty array of addresses.
View 1 Replieswhat are the advantages/disadvantages of dataset and databinding?
View 3 RepliesBasically when editing an item, I want to bind its ProviderId value to the DropDownList's select value.DropDownList is getting its list of values from other entity entity_List as you can see.
Markup:
<asp:ListView ID="aList" runat="server" OnDataBound="aList_OnDataBound" DataKeyNames="ListServID" DataSourceID="ListServCon" InsertItemPosition="LastItem" selectedvalue='<%# Bind("ProviderID") %>' >
[code]...
I have an ASCX that inherits from a WebControl that has a 'CustomConfiguration' property of type CollectionConfigurationItem. This configuration gets set elsewhere in the code, so by the time it gets to the ASCX it is set up to how I wish to use the data. At this point I'd like to render out another control using this configuration, like so:
<modules:DataModule runat="server" CustomConfiguration="<%# Model.CategoryListConfiguration %>" />
However, breaking into DataModule always results in 'CustomConfiguration' being null, which is the default value for the property. I've tried adding a Bindable attribute to the property but to no avail, and when I set an EventHandler for the DataBinding event on the DataModule it doesn't even get called.
How can I set this custom-class-typed property from the markup or, failing that what's the second-best method of getting this to work?
I have a gridview databound to an objectdatasource. Everything worked great until I changed 2 columns from asp:BoundField to asp:TemplateField. These are the UPC column and the Part column. I wanted to show a link button for each of these fields that take the user to another page. Now asp.net expects these two fields to be parameters on the update store procedure. Why is this? How do I get it to not assume these columns need to be passed to the store procedure?
Here is the code for the grid view:
[code]....
Quick question here. I'm sure it's possilbe, just can't get it to work.
I've got a gridview. In have a gridview. The gridview is bound to a list of my custom class. The class exposes a link to an image as well as the image's height and width. I have a Image Control in the gridview. I've bound the Image Url to the correct property. Now, I'd like to bind the height and width properties as well. But everytime I do that I get the following error:
Cannot create an object of type 'System.Web.UI.WebControls.Unit' from its string representation '"<%#Bind("GetImageHeight()")%' for the 'Height' property.
Here is an example of the tag:
<asp:Image runat="server" ID="imgProduct" ImageUrl='<%#Bind("ImageUrl")%>'
Height="<%#Bind("GetImageHeight()")%>" Width="<%#Bind("GetImageWidth()")%>">
</asp:Image>
[code]....
I have a collection of objects I bind to a Listview like this:
if (!IsPostBack)
{
List<Equipment> persons = new List<Equipment>
{new Equipment{ItemName = "Sworn", ItemCount = 7, ItemCost = 255}, [code]....
I want to Add/update/delete from this object collection and submit the final data object collection to the BL when the user saves... Rather than just delete/add/update everytime a row is changed.So my question is how do I maintain state for that datasource? I have tried this (delete example)
protected void lvMain_ItemCommand(object sender, ListViewCommandEventArgs e)
{
switch (e.CommandName)
{
case "Delete":
{[code]....
But it does nothing. I can't rebind it to the datasrouce because at this point the datasource is null.. I assume the listview keeps its own view state which contains the data?... I guess worse case I can always hold the Object Collection in a Session object.. ..
I want to bind data from SQL server to a dropdownlist. I have found out how to bind the content very simple: I have an array named mat, which I fill with data from this db-call: vb Code:
mat = GetData(clsDbInfo1.GetMaterialer(Session("language"), Session("sId")).Tables(0), Session("language"))
and then I bind the data to the droplist here:
vb Code:
For Each itemMat In mat lstMat.Items.Add(itemMat) Next
But here is my question: How do I bind value content to the dropdownlist just like:
vb Code:
Dim lst0 As New ListItem("Test0", 0) lstMat.Items.Add(lst0)Dim lst1 As New ListItem("Test1", 1) lstMat.Items.Add(lst1)
How do I do that? I have an array including the value content named matId, I want to add the content in the For-Each loop, is that possible??
I'm getting this message when going to a web app that accesses my service.
"The content type text/html of the response message does not match the content type of the binding (text/xml; charset=utf-8)..."
The thing is, it happens once in a while even when no changes have been made to the service or the web app. And I can make it go away most of the time by going directly to the .svc?wsdl page in my browser and then coming back to the web app.
How can I prevent ASP.NET page from automatically binding data controls on the page? I want to increase performance and I want to do binding of each data control based on my own order.
View 1 RepliesHow to Sort The datatable in asp.net. after binding the dataset values i have stored into one table how can i sort the values of the dataset in asp.net with C#
View 4 RepliesI am using subsonic in asp.net forms C# and I have an instance where I need to loop through a recordset and for each one call the Database to get specific information from a view about that record.
in this instance it is a venue, loop through and for each venue I show there spend and there budget, but I am at a loss as to how I can say use a gridview, execute more code on each row and then add more columns to that row.
just as an update i have been playing with the idea of something like this:
DataSet ds = new DataSet();
ds.Tables.Add(LinqToDataTable(club.All().Where(x => x.level == 1)));
ds.Tables.Add(LinqToDataTable(ViewBudgetSpend.All().Where(x => x.periodfrom == curperiod)));
DataRelation relation = new DataRelation("budgets",ds.Tables[0].Columns["clubId"],ds.Tables[1].Columns["clubid"]);
ds.Relations.Add(relation);
still working this out though.
i am getting my dataSet from web service and want to know the method to bind it to the rdlc report. how to do it in VB?
View 1 RepliesWe are in the process of migrating our current asp.net gridviews to silverlight grids. The challenge that I am facing here is that in the gridview, the grid is bind to a dataset/datatable. But in silverlight, I do not have dataset/datatable available in the silverlight class. So only option is to create a Webservice and convert the dataset that I am currently getting from business layer to a class that imlements IList<> (unless there are any other ways). Now to convert this dataset to Ilist, I have to loop through the dataset to load the List. In my current dataset I have almost 10,000 records or even more in some cases. So the response time will be really slow.Are there anyways to
1) Load the List from dataset directly without looping through ?
2) Fetch the data from database directly to a List without having loading the dataset ?
I have webpage with three dropdown boxes on left side (Country Dropdownbox, State Dropdownbox, City Dropdownbox) and these dropdown works independently or one box will depend on another. I have a gridview in right side and the results will be binding to the gridiew by selecting the left side dropdown boxes.
I need to implement the caching technology here because the web page loading very slow due to large amount of records. For example if i select any country from the first dropdown box and the other two boxes are default (Selected text is "ALL"), then It should display records related to selected country in gridview.
Further if I select country and state from the respective boxes then it should display the related records in the gridview like so on. Now i want do some caching functionality to improve the performance. I tried caching the Dataset while binding to gridview but in my case the results will not be static becasue user every time will select different options from different dropdown boxes and results will come based on the selected options.
Is it possible to populate a listview with a dataset? I have a function that returns a dataset. Why im asking this is because my SQL is quite complicated and i can't convert it to a SQLDataSource...
Public Function getMessages() As DataSet
Dim dSet As DataSet = New DataSet
Dim da As SqlDataAdapter
[code]...
i am fetching data in a dataset.now i m trying to modify the contents using :
For Each row As DataRow In ds.Tables(0).Rows
If row.Item(7) = False Then
ds.Tables(0).Rows.Item(6) = "`/abc/xx/" & row.Item(0)
End If
next
but, this gives me error saying roperty 'item' is read only.
I have
ReportViewer1.LocalReport.ReportPath = Server.MapPath("reports/trp1.rdlc");
ReportDataSource rdS = new ReportDataSource("LBLDS_Label", GetData());
ReportViewer1.LocalReport.DataSources.Clear();
ReportViewer1.LocalReport.DataSources.Add(rdS);
ReportViewer1.DataBind();
ReportViewer1.ServerReport.Refresh();
ReportViewer1.Visible = true; public DataTable GetData() {
sql statemnet to get data }
When I debug & execute the statement i get 4 records but on the report i get only one record ....
i cretaed a dataset from storedprocedure & binding to .rdlc report when i preview the data in dataset i get the output but i am not getting the field names by which i can make the report
i am not able ot bind the columns on report i cretaed a dataset from stored procedure but i am not getting the firld names for adding it to the rprot