I know the way to bind a Dropdown List control with database in VB.NET, but how can I did it if I have two Dropdown List? Both Dropdown List is from same database but what I want to populate on grid view is from Views. Can someone give me some source code to write or any advice is appreciate. Thank in advanced.
<asp:Label ID="Label1" runat="server" Text="Dealer Name:"></asp:Label>
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem>Choose Dealer</asp:ListItem>
<asp:ListItem>Chai</asp:ListItem>
<asp:ListItem>Chang</asp:ListItem>
<asp:ListItem>Aniseed</asp:ListItem>
</asp:DropDownList>
<asp:Label ID="Label2" runat="server" Text="Recipe: "></asp:Label>
<asp:DropDownList ID="DropDownList2" runat="server">
<asp:ListItem>Choose Recipe</asp:ListItem>
<asp:ListItem>Cake</asp:ListItem>
<asp:ListItem>Pie</asp:ListItem>
<asp:ListItem>spaghetti</asp:ListItem>
</asp:DropDownList>
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
I want for example when choose DropDownList1's dealer and DropDownList2 recipe, the data grid will display the data that I stored in database(Views).
Related
What is the correct method to access the data-bound item inside of a nested UpdatePanel? I've recently discovered model binding and love the strongly-typed binding it offers, but I have a scattering of UpdatePanels throughout the page, and it seems to break access to the Item object. If the entire databound control is inside the UpdatePanel I have no problem. This works:
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:Repeater runat="server" ID="myRepeater" ItemType="Test.Person">
<ItemTemplate>
<asp:Label runat="server" Text='<%# Item.Name %>' /><br />
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
</asp:UpdatePanel>
But if the UpdatePanel is inside the bound control, I no longer have access to Item. This does not work:
<asp:Repeater runat="server" ID="myRepeater" ItemType="Test.Person">
<ItemTemplate>
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:Label runat="server" Text='<%# Item.Name %>' /><br /> // <-- Problem line
</ContentTemplate>
</asp:UpdatePanel>
</ItemTemplate>
</asp:Repeater>
CS0103: The name 'Item' does not exist in the current context
I fumbled my way onto a clunky solution, which is this
((Person)GetDataItem()).Name
But I desperately hope this is not the best way of accomplishing the task.
Good day everyone,
This is my first post in here and I would like to thank you all for the great efforts in this forum by which I have already gaind a lot of skills.
I have a smalle issue with two nested repeaters. Basically, I have a dropdownlist in a child repeater which contains rating values and every time the dropdownlist is changed in the child repeater the new percentange is calculated and presented in a label in the parent repeater. This will cause full postback which is really frustrating when going through too many dropdownlists. My question is how to reflect the new calculated percentange in the label without postback. I have tried to use AsyncPostBackTriggers but no luck. Any suggestions would be appreiciated
<asp:Repeater ID="rptParent" runat="server">
<ItemTemplate>
<asp:Label ID="lblAvg" runat="server" Text='<%# Eval("TrialScore")%>'></asp:Label>
<asp:Repeater ID="rptChild" runat="server">
<ItemTemplate>
<asp:DropDownList ID="lstRate" runat="server" OnSelectedIndexChanged="lstRate_SelectedIndexChanged" />
</ItemTemplate>
</asp:Repeater>
</ItemTemplate>
</asp:Repeater>
Wrap your aspx mark up inside update panel like this.
<asp:UpdatePanel runat="sever" ID="upParentChild" >
<ContentTemplate>
<asp:Repeater ID="rptParent" runat="server">
<ItemTemplate>
<asp:Label ID="lblAvg" runat="server" Text='<%# Eval("TrialScore")%>'></asp:Label>
<asp:Repeater ID="rptChild" runat="server">
<ItemTemplate>
<asp:DropDownList ID="lstRate" runat="server" OnSelectedIndexChanged="lstRate_SelectedIndexChanged" />
</ItemTemplate>
</asp:Repeater>
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
</asp:UpdatePanel>
This will make sure that only controls inside update panel are posted back and not the whole page.
I have a gridview with a dropdownlist in one column in editing mode
The problem is that I can't save the selected value after edit and I can show the data from the field when I press edit.
I show some examples doing SelectedValue='<%# Bind("Category") %>' but the SelectedValue is unrecognizable.
The page is
<asp:TemplateField HeaderText="Category" SortExpression="Category">
<EditItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server" DataTextField="Category" >
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("Category") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
When I use a textbox instead of the dtopdown then the values after editing are saved correctly
Any ideas?
Finally I found a solution to my problem.
In the templatefield I've select edit databindings and then in the SelectedValue I've select Custom Binding and put Bind("category")
Now it works
I have a collection of records, each record has an ID and a description.
Now in my formview I have 8 textboxes and I want each text box to hold description
of each record.
So if I do this
Text='<%# Eval("Record[0].Description") %>' />
This gives an error, any other way to do it?
Also can I do it in the markup, or do I need to do it in code behind, under databound method for the formview?
Thanks..
FormView is not meant for showing List of Data.
If you have a List of Data, then you should use GridView or ListView.
Bind your FormView with a datasource having single record and then directly Eval the fields of the datasource.
i.e. do this:
<asp:FormView ID="FormView1" runat="server" DataSourceID="SqlDataSourceId">
<ItemTemplate>
<asp:TextBox id="txtDescription"
Text='<%# Eval("Description") %>' />
<asp:TextBox id="txtName"
Text='<%# Eval("Name") %>' />
..
</ItemTemplate>
</asp:FormView>
so basically, your FormView should contain different DataField and it should be bound to a DataSource having just one Item.
You could use a repeater inside:
<asp:repeater ID="rep" runat="server" DataSource='<%# Eval("Record") &>'>
<ItemTemplate>
<asp:textbox id="txt" runat="server" Text='<%# Eval("Description") &>' />
</ItemTemplate>
</asp:repeater>
In the repeater you will bind to your outer datasource, inside the repeater your datacontext is the record
I'm a newbie when it comes to asp.net, so grateful for any help.
I have a simple data bound drop down list, with a details view control. I can select a value from the list, hit update and the correct value gets written to the database. Problem is, the control the automatically "resets" to display the 1st value in the list. This would confuse the user and make them think they'd selected the 1st value prior to the update.
The only code-behind code in relation to this drop down list can be found in the ItemUpdating method of the details view control, as follows:
DropDownList ddlLoc = (DropDownList)dvYourProfile.FindControl("ddlLocation");
e.NewValues["PreferredLocation"] = ddlLoc.SelectedValue;
And here's the code form the aspx page
<asp:TemplateField HeaderText="Preferred Location"
SortExpression="PreferredLocation">
<ItemTemplate>
<asp:DropDownList Text='<%# Bind("PreferredLocation") %>' DataSourceID="dsStaticDate" ID="ddlLocation" runat="server" />
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList DataValueField='PreferredLocation' DataSourceID="dsStaticDate" ID="ddlLocation" runat="server" />
</EditItemTemplate>
<InsertItemTemplate>
<asp:DropDownList DataValueField='PreferredLocation' DataSourceID="dsStaticDate" ID="ddlLocation" runat="server" />
</InsertItemTemplate>
</asp:TemplateField>
<asp:SqlDataSource ID="dsStaticDate" runat="server" ConnectionString="<%$ ConnectionStrings:ApplicationServices %>"
SelectCommand="SELECT * FROM StaticData" />
You need to bind form the code behind. The out-of-the-box behavior of binding on the aspx page with the SqlDataSource does not allow you to stop the rebinding of the DropDownList after an event occurs.