Web Forms :: Compare Two DataTables And Return 3rd With Difference?
Mar 29, 2010
I have two DataTables, with Different Columns. Some of the Columns are same between them.
i am looking to do this.It is also refered to as MINUS and is simply all the rows that are in the First table but not the Second.
These three colums are same between the two tables.
string[] strCols = { "CustomerID", "CustomerName", "CustomerCity" };
I tried this but it seems to return all the Rows from the Table1.
[Code]....
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Jul 30, 2010
I need to compare 2 DataTables that do not necessarily have the same structure. One dataTable is the master (dtDB), the second dataTable (dtFORM) is what will have the changes, if any, but not necessarily all of the columns of dtDB. In both tables the first column will be the primary key and all columns that dtFORM has, dtDB will have.
There is another DataTable (dtResults) that will flag the differences
This is where I am at so far:
[Code]....
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Jun 30, 2010
I have two datatables with same columns. I want to compare those two tables and I want to know whether data in those tables is same or different. If both Prod and Qty are same then I have to get true or else false.
That is
TblOne
Prod Qty
A 2
B 2
C 3
TblTwo
Prod Qty
A 1
B 2
C 2
As of now I am looping thoruh all the rows. Is that the only solution or is there any best way to do this ?
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Feb 10, 2011
DataTable 1 :-
Caption |ID
------------
Caption1|1
Caption2|2
Caption3|3
DataTable 2 :-
Name |ID
------------
Name1|1
Name2|2
I want to compare the above two data tables and fetch the value "Caption3" so I can display a message on screen that "No name for "Caption3" exist!"
I have tried merging as follows but it's fetching DataTable 2 as it is in dtTemp !
datatable1.Merge( datatable2);
DataTable dtTemp = datatable2.GetChanges();
Also tried the logic as follows that removes rows with same IDs in both tables and updates datatable2's rows and only the ones that don't have duplicated IDs will remain...This didn't work either.
if (datatable2.Rows.Count != datatable1.Rows.Count)
{
if (datatable2.Rows.Count != 0)
{
for (int k = 0; k < datatable2.Rows.Count; k++)........
How do I fetch those "CAPTIONS" whose corresponding "NAMES" do not exist?
Note:- Rows in both datatables will vary based on some logic. What I want is to fetch that CAPTION from datatable1 who's KCID doesn't exist in datatable2.
edit:- How else do I loop through datatable1's rows and check which ID(from datatable1) doesn't exist in datatable2 and then print those captions on my page?
@CodeInChaos:: I have not worked with Linq-To-Objects at all so not able to understand your code :/
Is there any other way to loop through that datatable and fetch "caption " who's correcponding "Name" doesn't exist in the datatable2?
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Feb 22, 2010
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Aug 12, 2010
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<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="lblTrialPeriodEnds" runat="server" Text='<%# Eval("trialPeriodEnds","{0:dd/MM/yyyy}") %>'
Width="61px"></asp:Label>
</ItemTemplate>
<HeaderTemplate>
TrialPeriodEnds
</HeaderTemplate>
<EditItemTemplate>
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Oct 6, 2012
I use below code for my button event
int Result = _cmd.ExecuteNonQuery();
if (Result > 0)
{
Session["Login"] = true;
Response.Redirect("~/Managers.aspx?BehCode=" + Server.UrlEncode(TextBox1.Text));
}
But it didn't work it didn't go to managers.aspx page but when I replace code with below code it worked correctly it go to managers.aspx
int count = Convert.ToInt32(_cmd.ExecuteScalar());
if (count > 0)
{
Session["Login"] = true;
Response.Redirect("Managers.aspx?BehCode=" + Server.UrlEncode(Txtbeh.Text));
}
Why this happen whats exact different between two code?
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Jan 27, 2010
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Jan 10, 2011
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<asp:Label ID="lblStartTimeEnter" runat="server" Text="Start Time:" Width="100px"/>
<asp:TextBox ID="txtStartTime"runat="server" MaxLength="50" Width="250"/>
</asp:content>
<asp:Content ID="Content4" ContentPlaceHolderID="rightForm" Runat="Server">
<asp:label ID="lblEndDateEnter" CssClass="formMargin labelInput" runat="server" Text="End Date:" Width="100px"/>
<asp:TextBox ID="txtEndDate" CssClass="formMargin" runat="server" MaxLength="20" Width="250" ClientIDMode="Static"/>
<asp:CompareValidator ID="cvlDate" runat="server" ControlToValidate="txtEndDate" ControlToCompare="txtStartDate" Operator="GreaterThan" Type="Date" ErrorMessage="Start Date must be before End Date" > *</asp:CompareValidator>
</asp:content>
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Feb 15, 2010
I am using compare validator to compare date... But Its not working ...I have used calendar extender...with date format as "dd/MM/yyyy"...
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Apr 17, 2010
I am trying to check for a condition such that a date in an input control (textbox) is not greater from a date 1 years from current date(exactly) and also it should not be less than a date 1 year back from current date. for eg. if today's date is "21/dec/1990" then usen cannot enter a date in textbox which is less than 21/dec/89 and it should not be greater than 21/dec/1991. for this i first tried to confirm the greater than condition, i wrote the following code:
<asp:TextBox
ID="TxtSessionFrom"
runat="server"></asp:TextBox>
<asp:CompareValidator
ID="CompareValidator1"
runat="server"
ControlToValidate="TxtSessionFrom"
ErrorMessage="CompareValidator"
Operator="GreaterThanEqual"
Type="Date"></asp:CompareValidator>
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Oct 18, 2010
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Jul 9, 2010
I need to asynchronously retrieve several resultsets which I store in DataTables and add these DataTables to a DataSet. When the final DataTable is filled and added to the DataSet the page must then continue processing utilizing this DataSet I have figured out how to implement delegates to asynchronously retrieve my DataTables but I'm unclear how to add them to a DataSet in a thread-safe manner. How is this best accomplished? Before processing I know how many DataTables there will be, so what is the best way to track the progress of the asynchronous retrievals and allow the page to continue only after I have all of the data?
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example:
ID data1 data2 data3 data4 data5 data6
1 X X X
2
3
4
5
1 X X X
2 X X X
3
4
5
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Apr 30, 2013
if i want to get multiple values from database and pass this dataset to another page can we use session to store the dataset values..i knw we can..but some one says that its not a gud approach..this will cause server process down..is it true?if it so then wat are all the other ways to do that?
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My DataTable method: [Code]....
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Sep 27, 2010
I have 2 datatables and i would like to join these two tables based on same TemplateID in both the tables. How can i do it in c#.
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Nov 25, 2010
I am trying to create a stock scanner which allows users to filter stocks based on multiple criteria that they select.
Like the following example with 2 criteria:
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I think the only way to accomplish this is to put each criteria-filtered result into an array or datatable, and then try to query to see which stocks exist in all the arrays/datatable (in other words satisfy all criteria), and to display these stocks in a gridview. After doing some research online, it is possible to do query from multiple datatables by either using:
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Jul 31, 2010
My project is in Asp.Net Webforms using C#.
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These tables can have anything between 60 and about 500 rows.
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Feb 11, 2010
but back in the days of Webforms you would return a Dataset which you would then bind to a grid. But now in MVC you're not supposed to pass a datatable because you cannot serialize it and it's technically passing objects into the View where it doesn't belong? But how on earth am I meant to display data on a view?! I can't use LINQ to SQL classes here since this is a pure in memory data structure.
Ideally I'd just like to able to have an object which I can iterate within the view.
I'm really at a bit of a loss I have read the article from the "Gu" and I can only surmise that I have to pass back a ViewData Object instead?? Am I going nuts here?
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Jan 15, 2010
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/*ideally Get_ChildAndParentInfo(int pointid) function returns array list but how to deal with array list containing datarows with different data types */
public static ArrayList Get_ChildAndParentInfo(int PointID)
{
[code]...
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Oct 27, 2010
I am trying to combine two datatables into single datatable... First table contains 3 columns[e.g: 'col1','col2','col3'] Second table contains 2 columns[e.g: 'col4','col5'] Both tables have the same no.of records[rows], but different columns. How to combine them into single table? I need DataTable with columns ['col1','col2','col3','col4','col5']. I am inserting through looping the both the tables and adding values into third table. I tried the Merge (DataTable.Merge()), but it is adding the records to bottom of first one, but i need it should be added to the side[as columns] to first table'
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want to make relation between two datatable based on one column
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[Code]....
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