Forms Data Controls :: DataTable Select Not Filtering Correctly?
Apr 21, 2010
have created a data table as global data table for the session. So when the user selects the drop down Address Type Main , Street, Emergency - I want the Address text fields to display based on user selects. So, for my dropdown i have datavaluefield column as addressid. And the datasource for this is datatable. I was having problems converting from datatable to dataview. Does anyone know how to do this? I was geting errors cant convert from datatable to dataview. I was choosing dataview because you have the filter option. But then I saw you could also select in data table. So I am trying to select a row in datatable with select with expression like this:
Dim dtAddress As
New DataTable
dtAddress = GlobalVariables.AddressTable
[code]...
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Similar Messages:
Jun 17, 2010
Dim dt As New DataTable Dim da As New SqlDataAdapter(s, c)
c.Open()
if Not IsNothing(da) Then
da.Fill(dt)
[code]...
When I call da.fill I am inserting all records from my query. I was then hoping to filter them to display only those where the GroupingID is equal to 0. When I run the above code. I am presented with all the data, the filter did not work. Please can you tell me how to get this working correctly.
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Feb 19, 2011
I am using a gridview in (Visual Studio 2010) to display records from a SQL 2005 database. I can filter my date range successfully but it does not include the end date. I have tried using the between expression as well as >= <= to return the dates from the beginning and end dates. I have search and found that this is due to the time portion of my datstamp in the SQL column (02/19/11 01:03:36 PM) where I am filtering by short date (02/19/11); therefore leaving the end date out of the records returned.
Now the solution I have read is to add a day onto the endate like this: 02/19/11 + 1 but I get a conversion error returned from the SQL server. I have tried to use convert in this matter to convert the textbox.text in the selectcommand to datetime 101 formats to overcome this but I must still be missing something because it comes back with another SQL error unable to convert nvchar to datetime.
In the end I would like to have my two textboxes StartDate - EndDate filter the dateStamp column in my Transactions table and if both textboxes have the same date return records for that date only and include the EndDate if the range is more than one day.
I have tried many different variations of the below code using $,#,+ and & symbols to encapsulate the EndDate controlparameter to add a day to the EndDate and have failed at all attempts.
This my markup that filters fine excluding the EndDate;
[Code]....
I have tried using this as well and work excluding the EndDate:
[Code]....
selectcommand="Select * from Transactions where DateStamp Between @StartDate and @EndDate">
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Mar 19, 2010
i have used one query like this
Select skillReq from tblPostJobs where SkillReq like '%Silverlight 2.0%'
it is working fine. But while giving
Select skillReq from tblPostJobs where SkillReq like '%Silverlight 2.0,C#%'
It is not filtering data from database. It is only checking starting and ending Character.In my database some keyskill are like that
Asp.net 3.5,4.0,C#,Sql server 2008,Silverlight 2.0,3.0.
My requirement is to check each word in "SkillReq" text.
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Mar 14, 2010
I have a standard gridview, with the standard paging and sorting interface enabled.The application holds appointments for three organisational units, with a maximum of 3000 appointment records being returned across all three units. The appointment records are quite small.
The choice I am faced with is to:
1. Have an Org Unit dropdown which returns to the datasource on change of selection and at inital databind, and returns appointment records for one org unit at a time i.e. approx 1000 records.
2. Have the objectdatasource return all 3000 appointment records for all org units at initial databind, and filter the objectdatasource by org unit on change of selection, thereby saving a trip to the datasource.
I guess the question boils down to identifying the point at which querying the datasource by org unit is more efficient than filtering the records returned by org unit.
Is 3000 records a lot for a gridview to be paging and sorting etc.
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Apr 14, 2010
i am using dt.select to filter rows
now i want to add those filter rows to a datatable
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Jul 17, 2015
I want all Index value from data table using condition. I have tried like below but not getting expected results
foreach (DataRow rows in dtResult.Select("IsOut = 'True'"))
{
int index = rows.Index;
}
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Jan 14, 2011
I have a query that looks like this attached to a sqldatasource :
SELECT [fldBaseline] FROM [BI_PATHS_Target_Baseline] WHERE fldBranch = @fldBranch and
fldyear=@fldyear and fldcategory = @cat
and i want to make a LABEL to read that fldbaseline value and i tried this :
[Code]....
btw the @fldbranch is pulling from a dropdownlist and so it the @year but the @cat is just defined always as 'LEAN' But im not sure what to put inside the select() part. i know you have to put atasourceselectarguments.empty if no parameters, but what would I do here since their are 3?
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Mar 22, 2013
i could bind the data form tables to dropdownlist in asp .net using linq.
ex:
var res=from n in dc. contacts where n.location==Hyd select new{n.Id,n.Name};
var res1=from n in dc. Morecontacts where n.location==Hyd select new{n.Id,n.Name};
dropdown1.Datasouce=res;
dropdown1.DataTextField="Name";
dropdown1.DataValueField="Id";
[CODE]...
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Aug 18, 2015
I have a ListView with Checkbox. My requirement is - When I click on any checkbox then it should return all the columns values of that row on behalf of that CheckBox. After much study I came to know that using DataTable and DataRow I can get all data of particular ID of a Row. But I am unable to work with this. My code is something like below:
DataTable dt=new DataTable();
dt=objBAL.Get_ShoppingCartData();
ListView1.DataSource=dt.Tables[0];
[Code].....
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Jan 3, 2014
I have records in database as
hotelid amenitieid
17774 7585
15636 7585
25363 7585
36933 11236
21412 45696
23521 65474
15636 65474
21412 65474
now in above, if i want only those hotelid where amenityid is 7585 and amenityid is 65474 and not any else hotelid , then how to use select query in datatable in asp.net
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Feb 17, 2010
I have dropdownlist of dates and depending on the date that the user selects from list, I would like to filter records that fall between the startyear and finishyear columns in the datasource. (My the problem is that I do not know how to declare the Startyear and Endyear from the query in the code as they appear underlined - probably the BETWEEN syntax is wrong too).
yYear = DropDownList1.Text
Using connection As New SqlConnection("Data Source=CHRIS-PCSQLEXPRESS;Initial Catalog=TorGHL;Integrated Security=True")
Dim cmd As String
cmd = "SELECT BarDetails.*, MenuHeadingId AS Expr1 FROM BarDetails WHERE (MenuHeadingId = 2)" & "WHERE " & yYear & " BETWEEN " & "(" &
StartYear & ")" & " AND " & "(" & EndYear & ")"
connection.Open()
Dim dapubcb As New SqlDataAdapterDim sqlcomm
As
New SqlCommand(cmd, connection)
dapubcb.SelectCommand = sqlcomm
Dim dspubcb As New DataSet("BarDetails")
dapubcb.Fill(dspubcb, "BarDetails")
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Oct 13, 2010
I'm using the code below to extract data from a gridview and populate it into textboxes for the days and two drop downs for Project and Category.
For some rows in the gridview everything but the category ddl populates correctly. If I click the row a second time the category ddl displays the correct category.
why I have to click twice for some rows?
[Code]....
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Jan 4, 2011
public static DataTable GetDataTable(SqlCommand sqlCmd)
{
DataTable tblMyTable = new DataTable();
DataSet myDataSet = new DataSet();
try
{
//1. Create connection
mSqlConnection = new SqlConnection(mStrConnection);
//2. Open connection
mSqlConnection.Open();
mSqlCommand = new SqlCommand();
mSqlCommand = sqlCmd;
//3. Assign Connection
mSqlCommand.Connection = mSqlConnection;
//4. Create/Set DataAdapter
mSqlDataAdapter = new SqlDataAdapter();
mSqlDataAdapter.SelectCommand = mSqlCommand;
//5. Populate DataSet
mSqlDataAdapter.Fill(myDataSet, "DataSet");
tblMyTable = myDataSet.Tables[0];
}
catch (Exception ex)
{
}
finally
{
//6. Clear objects
if ((mSqlDataAdapter != null))
{
mSqlDataAdapter.Dispose();
}
if ((mSqlCommand != null))
{
mSqlCommand.Dispose();
}
if ((mSqlConnection != null))
{
mSqlConnection.Close();
mSqlConnection.Dispose();
}
}
//7. Return DataSet
return tblMyTable;
}
I use the above code to return records from database. The above snippet would run in web application which expected to have around 5000 visitors daily. The records returned reach 20,000 or
over. The returned records are viewed (read-only) in paged GridView.
Would it be better to use DataReader instead of DataTable?
NOTE: two columns in the GridView are hyperlinked.
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Apr 2, 2010
If I am passed a datatable and I cant change the column structure..is there anyway to set an existing column to a Primary key so I can easily Find() the row I am looking for?
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Feb 11, 2010
I have a little problem with a DataTable.
[Code]....
The values are number but varchar, for example '100', '73', '87'. When i see the data this return 100, 87, 73, when should by 73, 87, 100 how can i sort the data????
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May 7, 2010
I would like to select some columns from a Datatable, I mean, something like Select Name, Surname, ID,
I'm trying to do something like this:
DataTable dtExcel = new DataTable();
DataRow[] buena = dtExcel.Select("NAME");
in order to get only a view or table with one column (NAME).
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Jun 18, 2010
I have an application which was recently ported from Classic ASP to .NET 3.5. I'm pulling some data from a stored procedure and once retrieved, I'm doing using the Select method on the DataTable in a loop so I don't have to keep going back to the database.It appears that there's something wrong here as I can refresh the page repeatedly and see the memory usage increase by a few megabytes, up to the point where we get an error. If we recycle the app pool in IIS, it starts working again, for a little while.
Is there a memory leak in this method? I did some research on the subject and Microsoft said there was an issue like that in .NET 1.0 and 1.1, but I'm using a higher version.Or, is this something else, such as not managing resources correctly? Here's a snipped of my code:
[Code]....
Initially, this app was using XML instead of a datatable and using XPATH to query the data, but it was too slow. I thought using a dataset with DataTable selects was a better option, but now we found this issue. I was thinking since the loop executes several hundred times that getting all the data and filtering through it on the client was a better choice instead of calling several web methods to get the subsets of data.
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Sep 21, 2010
I have made site with datalist and I want to use SQL data filtering and paging, my only problem is that i want to put filtering into paging procedure
paging 1)
Alter Procedure dbo.GetProductsPaged
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Sep 29, 2010
This seems like a stupid, basic question, but I can't find how to do it (plus I've been doing MVC and haven't done in webforms in ages now) - I've got a DataList object that hooks into an SQLDataSource object, and this works fine. However I need to create a second DataList object for a slightly different set of criteria. Rather than creating a second SQLDataSource object and thus calling the DB twice, I would like to make my SQLDataSource object return a broader set of results (this is easy as I am searching on a column, then each DataList is further filtering on another column) and then further filter these results on each respective DataList - how do I do this?
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Mar 29, 2011
I've been filtering my gridviews with the FilterExpression of the underlying ObjectDataSource etc. I am wondering how I can implement filtering on my GridViews if I just directly databind it to a datatable etc?
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Jan 28, 2010
I need to filter data in a View using three dropdownlists that are populated independently of one another. The items in the second ddl are not based on the items in the first, etc. Each ddl is populated using its own sql statement. I want to be able to use each of these dropdownlists independently of the other two, but I want the data that is returned to be based on the values already in the other dropdownlists when I make a selection change.
For example: DDL1 is populated with Horsepower values from its own SQL statement.
DDL2 is populated with Gallons per Minute from its own SQL statement, unrelated to what is chosen in DDL1.
DDL3 is populated with Diameter values from its own SQL statement, unrelated to either of the other DDLs.
I want to be able to make a selection from any of the DDLs and filter data based on the selection, and whatever the current value is for the other two DDLs.
I'm coding in C# and I think I may need to create a delegate and an event to listen for when the SelectedIndexChanged event fires on any of the DDLs. This is slightly more complicated than anything I've coded up to this point, I'm a beginner, and I'm not even sure I'm aiming in the right direction for a solution.
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Jun 9, 2010
I want to filter my gridview using two parameters that come from Dropdownlists. I bind these drops with two linq queries and next I would like to filter my gridview with query that has two parameters that comes from selected values from those drops. Everything is inserted in UpdatePanel. Here is my code:
asp:UpdatePanel
ID="UpdatePanel1"
runat="server"
>
[Code]....
I don't know how to get selectedvalues from dropdownlist and pass them to Bind() function which binds grid view
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Dec 30, 2010
I am trying to populate a gridview that returns only the logged in users' records. Specifically, I am getting a blank page when I load the page. To clarify, I get the blank page after successfully logging in to the ASP.Net Membership and do have data to return from the requested table.
I am reaching out to the online community after numerous failed attempts to research the solution and successfully return the desired results through trial and error variations.
ASPX Page
[Code]....
ASPX.vb CodeBehind
[Code]....
<%@ Page Title="" Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false"
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Jan 27, 2010
I'm using a GridView with an ObejctDataSource. The data is provided by a business object and not a DB. It returns a list of people and each person belongs to a group. Now I need to filter data. For example, I need to return list of people in specific groups. How can I specify a list of groups to be able to filter the data ? Could I use SQL like syntax ? I understand the filter expression works only when data is returned as a datatable. But in my business object I maintain data as hashtables and return as List<PeopleInfo>. Do I need to return list as datatable instead ?
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