I am trying to fetch a column value from a datasource when some value is selected from a dropdownlist on its change event.
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Here I want to fetch any other column's value that is not binded to a ddlCityName from sqldatasource.
I have four columns in datasource i.e. name, id, address, phno.
I want to fetch an address of a person who selects some value from ddl.
I have a detailsview, template as follows:
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Codebehind: creating dataset, getting data from sql with adaptor and filling into dataset object, then setting detailsview's datasource.
I add 2 button to above template to able to edit data at asp page, and added event handlers:buttons:
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My question is, what to do inside the detailsview update event function to able to edit and update data. My method can be wrong too.
see i want to fill datatable using datareader.
i have created object like this
SqlDataReader dr=cmd.ExecuteReader();
if(dr.HasRows)
{
}
I am using oracle as back end. In database there is a table with 5000 records and 160 columns. i want to display all these records in gridview(in asp.net, c#). But it takes more than 10 minutes to fill the dataset.
View 4 Replieswhat i have is the following code.
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I am new to asp.net and I'm trying to build my first web page, but when I try to fill a dataset at the page load event I get an error: object reference not set to instance of object. I've done this many times in vb.net. I can't figure out how to step through my code like I do when I'm creating a desktop app, so I don't know exactly where it's failing. I like to be able to see the values of things as it goes through the code.
Code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Label2.Visible = False
Dim dsCheckExisting As New System.Data.DataSet()
dsCheckExisting.Clear()
Dim adLookup As New OleDb.OleDbDataAdapter
adLookup.SelectCommand = New OleDb.OleDbCommand
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I m working on ASP.net2.0 I m facing an error like "Object reference Not set to an instance" while filling dataset wht will b the Solution for this error?
View 8 RepliesI have created a crystal report using dataset(.xsd) in asp.net,c#. It is working fine on local machines and my local machine IIS. on my local machine windows7 is installed. When I uploading it on on windows 8 IIS then data is not coming. Dataset is not filling on windows8 IIS.
View 1 RepliesI have developed one web application, I used ComboBox control, I got data successfully from database. My issue is I ComboBox ListItem Message is not working. I want to fist record is “Select Patient Name”. Below is my code...
<cc1:ToolkitScriptManager ID="ToolkitScriptManager2" runat="server">
</cc1:ToolkitScriptManager>
<cc1:ComboBox ID="ComboBox2" incrementalfilteringmode="StartsWith" runat="server"
CssClass="txtbox" DropDownStyle="DropDownList" AutoCompleteMode="SuggestAppend"
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how to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
I have downloaded the ajax control tool kit but i cant make the combobox display data from the db.
From what i read from online resources , it seems my syntax is correct...but data is not displayed!
Here some markup from my page
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
<asp:ComboBox ID="Supplier" runat="server" style="margin-left: 57px; display: inline;"
Width="245px" DataSourceID="dsSuppliers" DataTextField="SupplierName"
DataValueField="ID" MaxLength="0" AutoCompleteMode="SuggestAppend"></asp:ComboBox>
<asp:SqlDataSource ID="dsSuppliers" runat="server"
ConnectionString="<%$ ConnectionStrings:unrafpl %>"
SelectCommand="SELECT [ID], [SupplierName] FROM [tblSuppliers]">
</asp:SqlDataSource>
I want to get the select value from a combobox that is bound to a dataset.For binding the combobox I use:
cboEmployees.DataSource = ds.Tables["employees"];
cboEmployees.ValueMember = "employee_number";
cboEmployees.DisplayMember = "employee_name";
string SelectedValue = cboEmployees.SelectedValue.ToString();
I am using an Active Directory DirectorySearcher to populate a DataTable and GridView so I can make a sort of "Phone List", very similar to the following post: [URL] What I also want to do is use a ComboBox with Append AutoComplete mode to easily filter this phonelist. However, what datasource am I supposed to bind the ComboBox to?
View 1 RepliesSystem.Data.SqlClient is not filling DataTable named "Person" Go to [URL] Webpage message reads: Exception Details: System.Data.SqlClient.SqlException: Invalid object name 'Person'. Source Error:
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Source File: d:hostingcforedDefault.aspx.vb Line: 41 Stack Trace:
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i have a sqldatasource with complicated SQL select statement, but need to use that data. can i use that select statement to fill a dataset (or array)?
View 4 RepliesIm currently filling a dataset using an SqlConnection and a SQLDataAdapter:
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This method is causing other sql connections to timeout. What I would like to do is an SQLDataSource to fill the dataset. Is this possible?
I want to run a SUM on a particular against the DataSet returned by a SqlDataSource. How can I access the DataSet stored in memory that is returned by the SqlDataSource to run this calculation?
View 2 RepliesIf I need to fetch one whole column from Table1 in the DB, should I fetch it using datatable or dataset? I can do both ways. I mean ok I should use Datatable. Why is that? What would happen if I use Dataset? ok that's what I wanted to know. So there's memory issue. I mean whatever I use be it Datatable or Dataset, both will be fetching only ONE column frommy table in DB. How is Dateset's gonna use more memory then?
View 3 RepliesI have created alot of stored procedures in my application that return the result of a query in a datatable object. I never use a dataset. Why would I ever use a dataset over simply returning the result of a query as a datatable object?
View 3 Repliesi have one question for my project. i am fetching all users data in one dataset, but each user will be in unique datatable to avoid no. of database connection i will fetch data in one single transaction no. of user are more than 10000 ..is it practical to store more than 10000 tables in one single dataset what will be then performance issue for the same, it will be the diffrent application for my project to generate this much of data. how many no. of table one dataset can contain in visual studio 2008 with 3.5 framework?
View 2 RepliesShould i use dataset in code behind or SqlDataSource on the form designer to fill or bind a DropDownList in my asp.net page I am currently using SqlDatasource on the form and i bind the control to MySqlDatasource because i find it is very easy and to much faster but somebody told me to use dataset from code behind because of security and performance
View 3 Replieshow can i delete a row in datatable using linq to dataset?
I have a dataset in my project, need to delete some rows filtered by ID
how can i do?
How 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 RepliesHow to populate google charts using ASP.NET Dataset/Datatable
View 1 RepliesI have 2 views in sql server and I create a dataset with those 2 views as datatables. Now I need to create a datatable and programmatically fill it with the other 2 datatables. Take the 2 datatable and create a third one in the dataset not create a third view in sql server.
View 2 Replies