Forms Data Controls :: Assigning Dropdownlist Value Into Textbox When Editing

Jun 29, 2010

I am tryingto update my data on a gridview.... i have two ddl's and two textbox...when i click on the one ddl it post the value of the selectedvalue into the textbox and this happens the same for the other one..... I am using the rowupdating event handler... and here is what i have so far...


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Forms Data Controls :: Error In Editing DetailsView With Dropdownlist

Feb 22, 2010

ASP.NET - C# (C Sharp) - SQL Server

I've got a master table and a child table. The master table has a nullable column called ReferenceID and in some cases it should be NULL, but when it's null in a record, I get an error while going to Edit mode of DetailsView.

DB Tables:
MasterTable [Columns: MasterTableID (PK), Name, ReferenceID (FK)(Nullable)]
ReferenceTable [Columns: ReferenceID (PK), Reference]
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False">
<asp:BoundField DataField="MasterTableID" HeaderText="MasterTableID"/>
<asp:BoundField DataField="Name" HeaderText="Name"/>
<asp:TemplateField HeaderText="Reference" SortExpression="Reference">
<asp:DropDownList ID="DropDownList_Reference" runat="server"
DataSourceID="ObjectDataSource_ReferenceTable" DataTextField="Reference"
DataValueField="ReferenceID" SelectedValue='<%# Bind("ReferenceID") %>'>
<asp:Label ID="LabelReference" runat="server"
Text='<%# Bind("Reference") %>'></asp:Label>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
Select Queries:
Select MasterTable.*, ReferenceTable.Reference
From MasterTable INNER JOIN
ReferenceTable ON MasterTable.ReferenceID = ReferenceTable.ReferenceID
Select * from ReferenceTable

In Read Only mode all everything is OK, but when I click on Edit and Postback happens, I get the following error: Server Error in '/Sample' Application. 'DropDownList_Reference ' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value It means that in MasterTable, the ReferenceID shouldn't be NULL, but it should be in some cases.

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Forms Data Controls :: Editing Datas In Gridview Using A Dropdownlist?

Dec 20, 2010

i am making an application using a datagridview... And I am very new to it. And I need to edit my datas in gridview using a dropdown list.

So this is the flow of the program. As the page load, my gridview will appear, with the datas from the database binded to it, so far I have done that already. Every row in the gridview has an edit hyperlink, so when I click that, I can change the values in that row using a dropdownlist, wherein, the item in my dropdown are aswell from my database.

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Sep 28, 2010

I have a dataview running a stored procedure that's populating a textbox. I then want to edit (or not) that text and insert it using another query. However, whenever I populate the text box, it will always insert the original text. If i don't populate it, it will insert whatever text I input.


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Forms Data Controls :: Editing Time Field In A Dropdownlist Control Inside The Gridview?

Feb 8, 2011

I hav a gridview in which i display the project name,created date,Start time ,end time ,total hours along with the task id field which is visible=false.

My starttime and endtime format is 2010-10-13 03:00:00,but i want to display these two fields in dropdownlist ie.,only i want to display the HH:MM:SS in dropdown so that when the user changes the time it should be automatically be reflected in the total hours(6:0) field after updating.pls tell me what i have to do to bring the Hours ,minutes and seconds in dropdownlist into the cells of gridview with the value in database ,how to write the code.

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Data Controls :: Editing GridView Adds NBSP To TextBox?

Dec 30, 2013

I am having a form in which some textbox are to be kept empty so when i update it then save it again it stores nbsp; value evry time i edit it.

give me the code in which i can prevent it entering nbsp;

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Web Forms :: Assigning GUID As Dropdownlist Value?

Sep 29, 2010

I am still new to and it has been some time since i worked with code in general, so please forgive me for sounding stupid. I am using SQL to populate several drop down lists in a form, and later using the values selected to populate a datagrid. My issue is that the value i am trying to assign is a GUID in the database. So when I:

Do While (reader.Read())
Dim newListItem
New ListItem()Loop
newListItem.Value = reader.GetGuid(0)
newListItem.Text = reader.GetString(1)

I get an error stating :"Value of type 'System.Guid' cannot be converted to 'String'". My solution to this was to change "newListItem.Value = reader.GetGuid(0)" to

newListItem.Value = reader.GetGuid(0).ToString

that worked to generate the drop downs which was great, but now i am trying to use that value in a sql statement to populate a listbox and since the value is now a string, i cannot use it in my where clause to against a GUID field in the database. I would prefer to not have to convert the GUID in the first place, but have no idea how i could keep it in that format for my drop down list, and if that is not possible how can i convert the data back to GUID from String?

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Web Forms :: Assigning Value From Textbox?

Mar 24, 2010

I want to assigning value from TextBox Control ( it's inside Formview control )

to Variable when i click on Button Control with C# Code Behind .

I was try this code in two events (onClick, onClientClick)


but the value isn't assigning ,, What's the problem of this code ??

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Data Controls :: GridView Row Editing DropDownList / Object Reference Not Set To Instance Of Object

Dec 22, 2013

 I am trying to implement the code URL...I have a database table with Integer type.Here is the running code line: Code in GridView:

<asp:TemplateField HeaderText="RegionNavn">
<%# Eval("RegionNavn")%>
<asp:Label ID="lblRegionNavn" runat="server" Text='<%# Eval("RegionNavn")%>' Visible = "false"></asp:Label>


On Edit Click, the DropDownList in the GridView brings the previously selected value.On Update Click, the error is: "System.FormatException: Input string was not in a correct format."

dCmd.Parameters.Add("@KystverketRegionID", SqlDbType.Int).Value = int.Parse(ddKystverketRegionID.SelectedValue);
When I use the following code:

ddlRegionNavn.DataTextField = "RegionNavn";
ddlRegionNavn.DataValueField = "RegionID"; // from RegionNavn to RegionID

On Edit Click, the DropDownList values in the GridView is not firing and the following error shows.Object reference not set to an instance of an object. How to implement the code when having a value of type Int ?

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Forms Data Controls :: Overlapping Textbox On Dropdownlist?

Nov 8, 2010

How to overlap textbox on dropdownlist, i.e. suppose if i check any item from dropdownlist, the item should display on textbox and dropdownlist dropped items should not visible in dropdownlist(textbox and dropdownlist items should display at the same place)

I have used the following and

<div style="width: 62px">
<asp:TextBox ID="txtsttime" runat="server" Text='<%# Eval("Starting_Time", "{0:hh:mm tt}")%>' BorderColor="#8DC6EC" Width="40px" AutoPostBack="true" OnTextChanged="txtsttime_TextChanged"
BorderStyle="None" Font-Names="Tahoma" Font-Size="7pt" Style="position: static;
z-index: 2; text-align: left"></asp:TextBox>
<asp:DropDownList ID="DropDownList1" runat="server" BorderStyle="None" Width="62px"
BorderColor="#8DC6EC" Font-Names="Tahoma" Font-Size="7pt" AutoPostBack="true"
OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" Style="position: relative;
z-index: 1">
<asp:ListItem>08:00 AM</asp:ListItem>
<asp:ListItem>08:15 AM</asp:ListItem>
<asp:ListItem>08:30 AM</asp:ListItem>
<asp:ListItem>08:45 AM</asp:ListItem>

the problem with the above is when i put above controls in gridview and try to scroll the gridview, then the textbox data is fixed not scrolling with the gridview. how to scroll the textbox data along with the gridview.

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Forms Data Controls :: Binding A Textbox To A Dropdownlist Selectedindex?

Feb 11, 2010

I'm having trouble binding my textbox to my dropdownlist. I got it to work but I don't think it is the correct way of doing it. I have my DDL bound to a datasource and populating everything correctly. However, I couldn't find a better way of binding my textbox to it besides using the FormView control and its counterpart, Templates (edit,insert,etc) It looks messy and i was hoping there was a better way of doing it. I've researched it online for awhile now but I couldn't understand how to implement for my situation.

My DDL has company names in it and the datasource has all the information from the table including what I'm trying to have my textbox pull (Address).

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Jun 28, 2010

I have a table called "publication" which contains records about Sharkspeare's plays, there are columns called "type", "nortonoxfordnumber", "nortonoxfordtext" and "character". What I like to achieve is to allow users to search the data using both dropdownlist and the textbox. i.e., the listitems of the dropdownlist are Othello, Tempest and twelfth night. Users should be able to type a keyword such as "music" to search within the particular play say "Othello" from the dropdownlist.

I would like to add button click function, and I know that I need to use the query with "and" and LIKE, but I am not sure how to do it as I keep getting the syntext error.

I managed to get some code done, however, I only managed to be able to search one column at the time, here is my code:


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Forms Data Controls :: DropdownList Selection To Populate TextBox?

Sep 14, 2010

I have a dynamically generated dropdownlist, that lists e.g. Company Names. I want to be able to select a particular Company and display associated information e.g. Name, Address, City, State... etc. in text boxes adjacent to the list.

I am trying to fire the following code from the dropdownlist "OnSelectedIndexChanged" property, but cannot 1) get the code to fire upon selection, and 2) populate the text boxes...


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Forms Data Controls :: Cannot Populate The Textbox With Selection From Dropdownlist

Oct 27, 2010

Cannot populate the textbox with selection from dropdownlist


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Forms Data Controls :: Populating Listbox From Textbox And Dropdownlist?

Feb 1, 2011

1. textbox (Search for staff)
2. Dropdownlist( Search for department)
3. Listbox( Populate staff name based on textbox or dropdownlist)

I am able to populate the staffs indenpendantly according to what is written in textbox or dropdownlist. Whar i wanted to do is mix the population of staffnames from textbox and dropdownlist. In other words, when i search "sandra' in textbox and select a Department A , the listbox will show all the sandra from Department A only.


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Forms Data Controls :: DropdownList In Which Value Select Drops In To The Textbox?

Nov 20, 2010

When I try to use this code in a Form View, I get an error message:

Compiler Error Message: CS0103: The name avgift_namnTextBox is not in the current context
ROW: 35

Rad 33: if (dropDownlist.SelectedValue == "Other")
Rad 34: {
Rad 35: avgift_namnTextBox.Enabled = true;
Rad 36: avgift_namnTextBox.Text = string.Empty;
Rad 37: avgift_prisTextBox.Enabled = true;

Here is my code:

<%@ Page Title="Lista medlem" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="medlem.aspx.cs" Inherits="medlem" %>
<asp:FormView ID="FormView3" runat="server" DataKeyNames="faktura_id"
DataSourceID="SkapaFaktura" DefaultMode="Insert" Width="687px">


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Forms Data Controls :: How To Change A Textbox To Dropdownlist In Formview Insert Mode

Jan 5, 2010

I created a formview that I am using for data input (DefaultMode=Insert)

One of the objects I have is a text box (see below)


When I click submit I get a message that I cannot insert a Null into the field IntershipNumAvailable. This makes sense since I made this field a required field in the database.

How do I get the form to recognize that the user selected item is the one I want to write to the database?

What changes do I need to make here? Do I need to make changes to my parameter list?

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Forms Data Controls :: Gridview's Dropdownlist Control Become A Textbox In Edit Mode

Jun 17, 2010

This is my first post on this forum. I have a Gridview with the following Columns

1. Edit Column
2. User_ID (Read Only)
3. Email (Read Only)
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I have used wizard to populate a "Gridview" and the embedded "Dropdownlist" control in it. This is my reference: [URL] My Problem: The Data populates perfectly in Grid and Dropdownlist. But, when I Press "Edit" button the Dropdownlist goes into edit mode in the form of a "Texbox". (i dont want this) I still want it to be an editable dropdownlist.

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Forms Data Controls :: Add Dynamically TextBox And DropDownList In Gridview On Button Click

Oct 8, 2010

I have Gridview and Button Control on Form.i want to Add Dynamically TextBox And DropDownList In Gridview on Button Click Wich is placed outside of Gridview.

When i click on Button -> One TextBox and One Dropdownlist which contains values bydefault 1,2,3 should bind to gridview. Button is placed outside Gridview.

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Forms Data Controls :: How To Use Dropdownlist Selection To Populate Textbox With Database Field

Feb 15, 2011

I would like the user to select an item from a drop down list. Next to the drop down is a textbox or label control. From the ddl selection I would like to populate the textbox or label from a database with a corresponding field from the database the dropdownlist was populated from. On selectindexchange event I can populate the textbox with the Unique id from the value, but I need to input a different field into the textbox. Can I use some sort of variable to assign the Textbox.Text = ?

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Forms Data Controls :: Assigning Value Using FindControl?

Jul 23, 2010

I thought I had this all figured out, in fact the following is similar to another page I have that works, but dinged if I can see what is wrong with this.I have a FormView with the InsertItem Template as the default. I have a label "UserId" that is assigned the logged on user's userid on page load with:

LblUserID.Text = Membership.GetUser.ProviderUserKey.ToString , which I am certain works.

There is a textbox "User_IDTextbox" within the InsertItem Template of a FormView, and I am trying to write the UserID into that text box using this VB code in a subroutine:

Dim TxtBxUserIDParent As TextBox = DirectCast(FVAddTradeResort.FindControl("User_IDTextbox"), TextBox)
TxtBxUserIDParent.Text = LblUserID.Text

This does not result in populating the textbox within the InsertItem Template of the Formview template with the UserID

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Jan 1, 2010

trying to get something to work, which I think should be extremely easy.

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<asp:Repeater ID="Repeater3" runat="server" DataSourceID="SqlDataSource11">

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Jun 18, 2010

I now can reference a field in the formview, but, assigning it a value is fighting me.

I want to assign the UserName field in the formview with the login name from the Master (HttpContext.Current.User.Identity.Name).

(A) I tried the likes of: FormView1.FindControl("UserName").DefaultValue = username but of course that doesn't work.

(B) Alternatively, I tried to edit the SQL so that I passed it the HttpContext.Current.User.Identity.Name but didn't have any luck.

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Forms Data Controls :: Assigning An Image To Gridview?

Mar 5, 2011

My doubt is I am using a grid view that displays the content of many tables. i am using sql server 2005 for that. In a gridview column i have to display an appropriate image which will show when the value of another column and its row is having value as "Available". If the value is "NotAvailable" then the image column in gridview will show another image. How am i suppose to code it in three tier architecture.

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Forms Data Controls :: Dynamically Assigning A Value To A Griview?

Jan 11, 2011

I am sitting with bit of a problem !I want to assign a value to a gridview to subtract data from a database. Is it possible to do it on Page_Load?

For example : The User will enter Ford in a textbox and then the gridview must display all the cars that is made by Ford that are in the database?

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