Forms Data Controls ::Using A CompareValidator Control In GridView?
Apr 4, 2010
Using a CompareValidator control in GridView. I am validating a value by comparing it to another value found at different cell at edit time. My code found below and perfectly working as expected. Now, how to further make this code to dynamically work based on a flag (checkbox) found in a third cell?
Via RowDataBound
[Code]....
To elaborate more, here is my pseudo code example
If the FLAG cell is checked then, any input number should pass the validation. The Checkbox value is unchecked by default.
[Code]....
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Jan 11, 2011
I have 2 text boxes in which I am comparing the numeric value of one to the other. At first it works fine and I get the appropriate error message. But eventually as i plug in different numbers although I should be getting an error message I stop getting one. Is there something going on behind the scenes to fire the error message than I am unaware of. Also the error message fires some time when the value is less than the value of another control and equal to the value. I only want it to fire when it is less than the value of the other control.
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Jun 3, 2010
I have the following template defined within DetailsView ( DetailsView is bound to object data source ):
<EditItemTemplate>
<asp:TextBox ID="txtReleaseDate" runat="server"
Text='<%# Bind("ReleaseDate", "{0:d}") %>'>
</asp:TextBox>
<asp:CompareValidator ID="valReleaseDateType" runat="server"
ControlToValidate="txtReleaseDate" Type="Date" Operator="DataTypeCheck"
Display="Dynamic" > *
</asp:CompareValidator>
</EditItemTemplate>
Assuming I enter into TextBox txtReleaseDate a date in format month/day/year, then upon clicking an Update or Insert button, a CompareValidator control complains that date format is not valid. But if I enter date in format day/month/year, then object data source throws an exception Cannot convert value of parameter 'releaseDate' from 'System.String' to 'System.DateTime', while CompareValidator doesn't complain. I need the two controls to accept the same date format, so:
a) Since my DB stores date in format day/month/year, the best option would be for ODS to also accept this as valid date format. Can ODS be configured that way?
b)Can CompareValidator be configured to also accept month/day/year format?
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Jun 7, 2012
Looking for an example that demonstrates usage of different validations with respect to gridview.
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Oct 6, 2010
I am new to this forum as well as Visual Studio and asp.
I am connecting to an access db using Visual Studio Express 2010.
I have a dropdownlistbox that pulls names from a database. When I select a name Gridview1 gets populated. Now I want to populate Gridview2 with more data when I click 'Select' link in Gridview1 but it's not working.
I am passing name (string) and number (number) fields to the gridview2 based on the gridview1.selectedvalue property and am seeing:
Input string was not in a correct format.
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Mar 3, 2011
In my scenerio, i've a dropdownlistbox by which i want to filter, a textbox for the text to filter and two textbox for specifying from and to date.
A gridview control for displaying the filtered data and a sqldatasource control and a commandbutton called search.
The following code is used to filter the data in database and it works properly. But when i click on edit in gridview, the gridview displays no records and again when i click on search button the data is displayed on the gridview displayed with the selected row in editmode.
protected void btnSearch_Click(object sender, EventArgs e)
{
string query;[code]....
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Feb 15, 2010
i would like to compare the current date with the date entered by user..however, i'm encountering errors so far..
i tried something like this:
<asp:TextBox id="txtDate1" runat="server" />
<asp:CompareValidator runat="server" ErrorMessage="The date must be greater than today"
ControlToValidate="txtDate1" type="date"
ValuetoCompare="DateTime.Today.ToShortDateString()" />
and i got an error stating that the value of DateTime.Today.ToShortDateString() of the ValueToCompare property of "" cannot be converted to type 'date' i also tried ValueToCompare="DateTime.Now.Date()" and i got the same error message.
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Jan 8, 2010
I would like to use the gridview paging feature and have built a gridview with a user control. The data source has lots of columns, so to make it easier I want to return a LIST<MyObject> and just pass <Myobject> into the user control rather than all the data elements. Not sure how I access the object of the data source to bind to the control. Assume it would be during ondatarowbound.
Also, my guess is there is a better way to do this than gridview. I'd take either solution that allows me to have easy paging and pass the complete object into the user control
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Jan 26, 2010
I have managed to place a dropdown control iniside a gridview control. The dropdown does indeed populate in each row... Question: How is it possible for the system to correctly select the text in the dropdown based on the value of the field which is driven from the database? Is it to do with the selectedvalue?
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Jan 12, 2011
I am using lable control in itemtemplate tage in templatefield tag of gridview control for showing a field of my database .
I want if the lenght of string data is higher than 100 character the lable control doset show all of it ,
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Jun 30, 2010
How can i set the value of literal control inside itemtemplate control of gridview from code behind ?(i am using vb.net)
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Mar 15, 2010
i have a gridview control i added checkbox contrl dynamically but i am not getiing the reference of checkbox in button clilck event here is my code Gridvew
[Code]....
.vb code
[Code]....
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Sep 9, 2010
The width of the gridview control got increased in the browser, Because of that I got Horizontal Scroll. I don't want to get Horizontal scroll in the browser.
Below is the code .
<table align="center" width="100%" style="table-layout:fixed;">
<tr>
<td style="width: 115px">
OR</td>
[Code].....
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Feb 19, 2010
I currently have a gridview that has 1 column with radiobuttons. I then have a update button to update all the selected records. But what i want to do is add a step before the update. I want to add a multi-line textbox for each radiobutton selected to allow them to add notes/comments for each record before the update occurs.
Because the textbox will be large to allow them to enter the comments, i wanted to list them out seperately per record selected. Maybe a gridview is not what i need for the 2nd part, but thats the scenario and looking for suggestions on what / how to do it.
Example:
GRIDVIEW1
ID column1 column2 column3 radiocolumn
1 1111 2222 3333 Yes / No (selected Yes)
2 2222 3333 4444 Yes / No
GRIDVIEW2
ID NotesColumn
1 Texbox displays here
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May 8, 2010
I am developing a usercontrol which has a gridview control in it.
Now I want to set the datasoruce property of gridview. Datasoruce will be a generic list (List<Class>).
How to do this ?
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Apr 5, 2010
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
The above error occurs with gridview control , when used with template field columns with item template / and edit templates etc.
updating a row within gridview, at the time of loadiong it loads perfectly fined, but when tried to modify an existing row within gridview control, then it produces the error. Make sure the grid view control has to be a child control which manages the child table info with in a master form. to reproduce the above problem the grid view must be loading the child records info of a master within the masterform, meaning both master data and gridview data all to be managed in one single form.
I had to replace gridview control with datagrid and then it worked perfectly fine. I wasted almost 4 days of my time., there is no way we could figure out the problem. here is the full info of the problem.
Server Error in '/' Application.
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
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.Web.HttpException: Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
Source Error:
[Code]....
Stack Trace:
[HttpException (0x80004005): Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.] System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +306 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Page.LoadAllState() +312 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082
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Jan 10, 2011
I'm trying to extend the GridView control to enable sorting and paging for any situation.
When using my control I am fetching data from a database and filling a DataSet with it, then binding the GridView upon every page load. My first question would be, is this the correct approach?
To sort the GridView I am overriding the OnSorting method which stores the sort expression and direction in the ViewState, then creates a DataView and utalises the Sort method to sort the underlying data. It then sets the Data Source to this DataView and rebinds the GridView.
Paging is handled by OnPageIndexChanging which simply sets the PageIndex property and again rebinds the GridView.
My problem is; when any control causes a postback my GridView is no longer sorted, presumably because it is persistently rebound. If I don't rebind it then the GridView is empty on postback since the data isn't automatically stored in the ViewState. I have considered saving the data source in the ViewState but I would assume that this is bad practice for large amounts of data? - also DataViews are not seralisable.
The only solution I can think of currently is to override OnDataBound and sort the data every time. This results in a double sort when paging triggers a postback which seems inefficient. Code illustration of this below,
[Code]....
I'm looking for the cleanest 'best practice' solution as this is a learning exercise more than anything else.
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Mar 26, 2011
I tried to compare between 2 datetimes (dd/MM/yyyy hh:mm:ss) but not able to. It allows me Type="date" and not datetime.
[Code]....
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Jan 10, 2011
this is my aspx.cs code
[Code]....
on button click i used to validate my dropdownlist i set validation group also.. but its not working why...
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Jan 8, 2010
comparing two dates with comparevalidator
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Apr 26, 2010
How do I validate RequiredFieldValidator/CompareValidator conditionally. I have aded equiredFieldValidator/CompareValidator on date textbox. I want that if textbox1="No" thne it should not validate or compare date text box, if textbox1="Yes" then it should validate.
Is this possible on form submit button or any other way?
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May 20, 2010
i have 2 texztboxes for password function. Now i want to use the customvalidator to compare the 2 textboxes instead of the comparevalidator. I used a cs code like this bloew, but it doesnt work.
[Code]....
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Jan 11, 2010
I have a text for user inputs Date. There is a CompareValidator which is used to compare Date between 2 TextBoxes. User do not need to input separator. After finish inputting value, he presses Tab to call a Javascript function to Format value of this Textbox.
Ex : user inputs
TextBox1 (From) : 01012010 =>Press TAB =>Value : 01/01/2010.
TextBox2 (To) : 01022010 =>Press TAB =>Value : 01/02/2010.
But Compare Validator show Error after cursor leaves the TextBox2. If I choose these values from Date Picker => No problem.
I think Compare Validator is called before onblur event. Is that right?
If it is right, is there any way to do my work?
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Jul 8, 2010
I have two textboxes and a CompareValidator attempting to ensure that TextBox_1 contains a date that comes on or before the one in TextBox_2. When one textbox contains a date in "MM/dd/yyyy" format, and the other uses "M/d/yyyy", and the only difference between the two is a leading zero in the "MM" part, my validator fails to recognize that the dates are equal.
I've solved the problem by using the same format for both, but I'm wondering what's going on.
(I'd post the code, but there are so many layers -- controls using inherited classes, etc. -- that it would be more than a bit difficult to make sense out of ...)
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Jun 4, 2010
how to center align the column data in a gridview control in asp.net 3.5?
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