C# - Selecting A Value From Drop Down?
Aug 18, 2010
am having a problem in selecting a value from dropdown list. Regardless of whatever I choose only the first value is selected always. Here is the code...
protected void Button4_Click(object sender, EventArgs e)
{
SqlConnection con;
[[code]...
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Mar 28, 2010
I have three dropdowns that are used to choose a date (day, month and year). I want them to initially display today's date. They are being populated with code like this:
[Code]....
So the user changes the value to whatever they want and hits the Submit button and I try to collect the values they have chosen...
Code:
DateTime returnDate = new DateTime(Convert.ToInt32(myRYear.SelectedValue), Convert.ToInt32(myRMonth.SelectedValue), Convert.ToInt32(myRDate.SelectedValue));
But the #@#$!@# thing returns today's date!
This is not what I want obviously. Can anyone tell me where I'm going wrong? Why doesn't it return the date as chosen?
If I remove the myRDate.SelectedIndex = DateTime.Now.Day line from the initial population statement the 3 dropdowns are set to 1/1/2010 but the chosen values are passed to the database correctly.
Is there another way to set the initial selection that will not affect the dropdown for all time.
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Dec 7, 2010
I am trying to set the item that is selected from a drop down list based on what it in the database for that particular record. I am filling the dropdown list with a SQL DataSource I have tried a couple of example that I have found for selecting the item in the list but I am always getting the first item in the list as the selected item. This is what I am currently working with:
Code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If IsPostBack Then
Else
Dim ID = New Guid(Request.QueryString("ID"))
[code].....
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Mar 5, 2010
I have a drop down box with values that shows on loadUnited States Canada Now I have a function that is checking the users value from the database which is fired on a button click. What I plan on doing is comparing the string like if United States(db value) == United States (dropdown value) then go ahead and select United States in the drop down. When I do this I am getting the right value selected but it is making all the values the same for all records.
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Jul 4, 2010
In my controller I generated a SelectList that I pass to the dropdown helper:<%= Html.DropDownList("abc123", Model.SomeList) %>I look at the querystring for a value, which is a ID.I then loop through all the items in the SelectList and if it is equal to the ID, I do:The controller action then passes this SelectList to the view and then to the Html helper.In debug mode I can see the value does get set to true, but the html renders without selecting the item.
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Feb 11, 2010
What is the best way to do the above? Basically i have a drop down list box with a list of names pulled from a database. When someone selects a name i would then like to populate two further boxes with the persons Login ID and Email address which are held on the same DB. I have currently been using Combox1_selected index change and then running a select query on the database to fill in the other fields - unfortuntly this is too slow. There must be a better way then this? I will also need to put the values in a DB in a later stage so will need to be able to retrieve these values.
As an infopath developer this can be done easily on InfoPath using a filter - is there anything similar in ASP.net
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Dec 30, 2010
i want to update data in my table..for which i want to select drop down list value automatically when i click on Select button in my griedview.my drop down list contains City names and that data is shown in griedview, so when i am clicking on select button on particular row in griedview i want to make that city selected in drop down list..my Dropdown list id is "drpCity" and griedview ID is "GrdCity"
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Mar 12, 2010
How can I have 2 Cascading Drop Down Lists for the same Drop Down List?here is my problemi have 3 drop down lists read from database1- Schools List 2- Classes List3- Teachers ListEvery School will have more than 1 Class and more than 1 TeacherWhat I want is when user select a School from Schools Drop Down List then BOTH (Classes and Teachers) should be refreshed based on the School Drop Down List
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Mar 30, 2010
I have a drop down list that has the initials of about 12 of our sales guys.How can I make it so that when they select their initials from the list, the next drop down list only shows their customers.In my database there is a column for customer name and salesman.
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Aug 2, 2010
<td><%= Html.DropDownList("Weight", Model.Weightddl.Select(x => new SelectListItem { Text = x.Name, Value = x.Id.ToString() }))%></td>
Here is my line of code. I have the value Model.Weight which I want to have preselected on the load... How can I set it as the selected value?
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Mar 28, 2011
i'm using a strongly typed view with a custom viewmodel. this viewmodel contains a collection of books.
public IList<Books> Books { get; private set; }
i'm also passing a select-list to the view. however the DropDownListFor helper class doesn't automatically preselect the default value of the book.
@Html.DropDownListFor(m => Model.Books[i].AuthorID, Model.Author as SelectList)
everything else works, e.g. it does pass the selected value back to the controller.
i figured out a workaround by creating the select list in the viewmodel:
@Html.DropDownListFor(m => Model.Books[i].AuthorID, new SelectList(Model.AuthorList, "Value", "Text", @Model.Books[i].AuthorID.ToString()))
however i don't want to implement this workaround if there is a simpler solution. is there a way that the view can handle values from a collection?
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Jun 1, 2010
I am novice to aso.net programming using vb.net.I have three text boxes on a form.I have set their tab order also.text boxes already have some initial values in them when the form loads.what I want to do is when I press the tab button and it sets the focus on the next text box it should automatically select the whole value in thetext box so that when I start typing It overwrites the old value I dont have to delete the old value first and then write.P.S. I want to do the same thing in VB.net.
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Mar 26, 2010
My HTML looks something like this:
<table class="disabled">
<tr>
<td>
<input blah blah>
</td>
<td>
<img id="reallyLongASP.NetID" etcetc/>
</td>
</tr>
</table>
In all with a class indicated as "disabled", I want to set visibility: hidden on the <img>. I can disable using the crazy id ASP.Net gives, but would like to do a general statement that affects every control in the <table>
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Jan 26, 2010
validation only works when the user selects the next button, How do I also check when user selects the tab. code to follow.
Here is the main aspx page
[Code]....
cs
[Code]....
cs
[Code]....
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Dec 27, 2010
I am having trouble with this statement
[Code]....
I only want the record with the highest value in the EarnedPoints Column, but I get the error
Column 'customer_locations.City' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
I am trying to display the total points Earned, the Client Name, City and State.
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Aug 4, 2010
I have a drop-down list that is dynamically filled with a set of values. By viewing the source code in the browser I can tell that this list is correctly filled with the "value" and "text" parameters.
But if I try to retrieve the value using ddl.SelectedItem.Value I get the error "Object reference not set to an instance of an object" which means that there is no parameter in "value" to retrieve ...
Page_Load() contains an "If Not IsPagePostback" in which the list is filled. I don't want to use AutoPostback = True since I want to retrieve the value-parameter when I click a "save" button. I must have missed something fundamental here that I do not grasp ...
The code to fill the list looks like this:
Code:
Dim ds as Dataset ()
ds.ReadXml(the path to an xml file)
ddl.Items.Add(New ListItem("destination", "destination"))
ddl.DataSource = ds.Tables(0).DefaultView
ddl.DataBind()
This snippet does not generate any errors: Everything is printed as it should!
But inside my Submit function I cannot be retrieve the parameter:
Code:
objcmd.parameter.add("?destination ", OdbcType.VarChar).Value = ddl.SelectedItem.Value
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Nov 21, 2010
I want the user to be able to select, as in Windows forms a datetime picker, the date and time. Unless I am missing something this does not seem to exist in web forms.So my plan was. Create a text box and when the user enters that textbox it opens a calender. Then record the date the user has selected and update the relevant table.However, I get stuck again, as I cant seem to format the calender to show datetime. What is the best way of doing this?
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Sep 26, 2010
i try to use select statement to select records within a week from orderdate. like,
"select * from order where orderdate <= DATEADD(day,7,orderdate)";
correct me if wrong.
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May 21, 2010
asp.net 2.0 SQL 2005
I know how to do a simple grid view to show info, but with NO fancy stuff.
1) How can I click a row(not a field) and get the data for a specific field in a row ?
2) how can I put an image <img into a field of the grid view
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Oct 18, 2010
selecting multiple rows in a gridview using ctrl key. (C#, asp.net)
While right clicking on the selected rows, I need to export those particular rows to "word".
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Jan 19, 2011
I have an application that uses multiple identical databases. When the user logs in they select the database that will be working with for that session. I am EF 4.0 for to access the database. What I can't figure out is how to dymaically pass the database name of the database from a session variable to the code in the EDMX file.
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May 28, 2010
I want to select a particular item in a dropdownlist by value, in asp.net using IronPython.
I found I can do it like this
listItem = ddl.Items.FindByValue(x)
if listItem != None: listItem.Selected = True
But I want to do it in one line
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Feb 5, 2011
I was wondering if ther is a Way to select a table name from a DropDown Menu and then dispaly the data in say a GridView?
For Example;
In PHP you can post a Value to a Veriable and Put that Veriable into a SQL Statement.
"SELECT * FROM '.$VAR.'" would be the statment used to return the data.
I was wondering if there was a similar way to dot his. Currently I have a different page for each table with other dropdown menus to select other options, or would continuing to do it like i have just stated be better?
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Oct 27, 2010
I am using a treeview control. I am buliding the tree dynamically. sometimes the tree becomes larger and the down scroll bar is need to see the entire tree. user can select a node from the tree. if one node is selected ,i change the color of the node from server side.
my problem is that if a user selected a node which is bottom in the tree(means, the user used the down scrollbar to see that node), after postback it shows the top of the tree.to see the selected node the user need to use the down scroll bar.
I need to show the selected node after postback. How can I do this?
I am using c# and asp.net
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Mar 19, 2010
I have a repeater using a LinqDataSource as a data source. When a query string is entered, I'd like to filter the results, but ONLY when a query string is entered. If there is no query string, the results should not be filtered, all results should be returned.
I'm trying to add a WhereParameter to my LinqDataSource in the Selecting event of the LinqDataSource, but it's not working. Here's my code:
protected void ldsImages_Selecting(object sender, LinqDataSourceSelectEventArgs e)
{
if (Request.QueryString["id"] != null)
{
e.WhereParameters.Add("ImageTypeID", Request.QueryString["id"]);
}
}
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