Forms Data Controls :: How To Bind A DropDownList Inside A Repeater
Oct 29, 2010
I am new to ASP.NET, trying to learn it. I am using ASP.NET 3.5 with VB for scripting. Also read some books. I just can't figure out how to bind a DropDown List inside a Repeater Control. I saw a few examples but none were clear enough and explained all the details. I want to populate the Drop-Down using values from a Database inside the repeater.
I also read this article [URL] but still can't understand how to bind dropdown in a repeater.
I want to display 2 things inside the Repeater Control.
1. User Selected Values (which comes in the form of an Arraylist) from a previous page using "PostBackUrl" method.
2. Then allow users to select values from a Dropdown list corresponding to each design code they selected on previous page. (the dropdown values here must come from a backend db)
Also, I want to control the number or rows displayed inside the repeater control. It should be equal to the number of "design codes" selected by the user on a previous page.
Here is my code so far ....
ASPX Code:
<body>
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Aug 2, 2011
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Oct 28, 2010
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aspx.cs code:
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Oct 7, 2010
I'm trying to bind a value to a dropdownlist. Here how the code looks like in the aspx page...Bind the textboxes below is not a problem...but its not working with the dropdownlist..
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[Code]....
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Nov 1, 2010
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Jul 15, 2010
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[Code]....
To me this should work, but the problem I'm facing is that there are no repeater items. The Items.Count property in the repeater is 0. I am not calling DataBind on the Gridview nor the Repeater before this code is reached (this code is the first thing that happens in my button click event) and my binding is done inside a !IsPostBack statement in my page load. I've made sure databinding is not occurring by setting breakpoints on the code that databinds both the gridview and repeater.
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Feb 9, 2010
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May 7, 2015
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Jan 31, 2010
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So as an experiment I disabled EventValidation on the page (not the control it's self) and now I do not get an error, but I also do not ever hit the breakpoint I set in the innermost repeater's ItemCommand event.
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Jul 12, 2010
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Aug 6, 2010
I use DetailsView to insert rows in database. Row has fields id, subcategory_id etc. I want to fill dynamically dropdownlist ddl_subcategories, which is used in TemplateField. Selected item value of first dropdownlist ddl_categories is used as parameter for generating collection for ddl_subcategories. I try it with using UpdatePanel, but method DataBind returns error "Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.".
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[code]...
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Nov 12, 2010
what changed do I need to make to my code for it to achieve what I'm after.
At the moment I am getting a "cannot cast to type" error message with the below code.
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[code].....
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Sep 24, 2010
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Nov 10, 2010
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Mar 29, 2011
I have a table and 7 column name.
I bind the 7 column name in one dropdownlist.
Now the problem is,how do I extract the data value in a dropdownlist?
For example,
Dropdownlist contain 7 column name
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-subject_code
-venue
-time
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-admission_no
-subject_id
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Example
Math|9.00-10.00|Hall|18|09090J|...
Below is my current codes which I have a problem.
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source= EN\SQLEXPRESS;" + "Initial Catalog=ms;Integrated Security=SSPI");
SqlDataAdapter adapSel;
string mySQL = "SELECT '" + dd_list.SelectedValue+ "' FROM examtimetable ";
adapSel = new SqlDataAdapter(mySQL, conn);
conn.Open();
DataSet dsSel = new DataSet();
adapSel.Fill(dsSel);
GridView1.DataSource = dsSel;
GridView1.DataBind();
conn.Close();
}
Previously I have bind 7 column name in my dropdownlist
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack == false)
{
SqlConnection conn = new SqlConnection("Data Source= EN\SQLEXPRESS;" + "Initial Catalog=ms;Integrated Security=SSPI");
SqlCommand sqlCmd = new SqlCommand("select column_name from information_schema.columns where table_name='examtimetable' and COLUMN_NAME not like '%ID'", conn);
conn.Open();
SqlDataReader ds;
ds = sqlCmd.ExecuteReader();
dd_list.Items.Clear();
dd_list.DataSource = ds;
dd_list.DataTextField = "Column_Name";
dd_list.DataValueField = "Column_Name";
dd_list.DataBind();
dd_list.Items.Insert(0, "Select Option");
ds.Close();
conn.Close();
}
}
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Jan 26, 2011
I am working wirh repeater and i want to display 4 images using image control. user save only 4 images in database. but whenever user wants to see all four then how to bind all four images from one column at a time.
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Apr 22, 2010
I found a example of this but it wont work for me. So I will do a clean question by asking how do I bind a dictionary to a repeater?
I work with code behind so its for the OnItemDataBound. My Dictionary look like Dictionary<string, string>();
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Aug 23, 2010
i my website i am using Repeater control which further contain checkboxlist control. Now my problem is that i have successfully bind "Parameter Type" in repeater control but when i am binding checkbox values, it does't appears in display
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<h4>
<%#Container.DataItem%></h4>
<asp:CheckBoxList ID="chkParList" runat="server" RepeatDirection="Horizontal"
DataTextField = >
</asp:CheckBoxList>
<br /><br />
</ItemTemplate>
<SeparatorTemplate>
<hr />
</SeparatorTemplate>
</asp:Repeater>
In *.cs file following are my code
IMonitoringDataInfo objMonitoringDataInfo = new ChannelFactory<IMonitoringDataInfo>("MonitoringDataInfo").CreateChannel();
Collection<ParameterDetailDTO> clParameterDetailDTO = objMonitoringDataInfo.GetAllParameters(idList, out errorCode);
var parameters = (from resx in clParameterDetailDTO
select resx.ParameterType).Distinct();
Repeater1.DataSource = parameters.ToList();
Repeater1.DataBind();
counter = Repeater1.Items.Count;
while (i < counter - 1)
{
foreach (var parType in parameters)
{
var items = from resx in clParameterDetailDTO
where resx.ParameterType.ToLower().Contains(parType.ToLower())
select new { resx.ParameterName, resx.ParameterID };
((CheckBoxList)(Repeater1.Items[i].FindControl("chkParList"))).DataSource = items;
((CheckBoxList)(Repeater1.Items[i].FindControl("chkParList"))).DataTextField = "ParameterName";
((CheckBoxList)(Repeater1.Items[i].FindControl("chkParList"))).DataValueField = "ParameterID";
((CheckBoxList)(Repeater1.Items[i].FindControl("chkParList"))).DataBind();
}
i++;
}
I am using LINQ as datasource.
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Dec 22, 2010
I have this list of names where I want the location underneath each name but nothing is showing up. Is it not actually possible to bind the repeater's datasource to the items in the datalist because nothing is really selected in the datalist - it's just all there?
How do I need to be doing this?
[Code]....
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Feb 21, 2010
Apparently I am trying to do something that is a little unorthadox here. I am trying to use multiple arrays and bind them to one repeater in C#. I would think that there has to be a reasonably easy way to do this but I can not seem to find it anywhere online. This is what I have so far (that works). How do I bind multiple arrays to this one repeater though?
// Bind Array to Repeater repTest.DataSource = arrTest1; repTest.DataBind();
<form id="formTest" method="post" runat="server">
<asp:Repeater ID="repTest" runat="server"> <HeaderTemplate>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
</HeaderTemplate> <ItemTemplate> <tr height="30px">
<td width="40%"> <%# Container.DataItem %> </td> </tr>
</ItemTemplate> <FooterTemplate> </table> </FooterTemplate>
</asp:Repeater> </form>
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Mar 11, 2010
I would like to display contents of two (or more) tables inside a Repeater control grouped by some Category. I will be getting the data in sepatare DataReaders (not a single joined query). Is there a way to do this without resorting to building DataTables/DataSets ? I am aware of nested repeater techniques, just not sure how to relate the data with DataReaders.
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