I have one dropdownlist like this:
<
asp:DropDownList
ID="ddlProcessStatus"
CssClass="PanelDataText"
runat="server"
DataValueField="intProcessStatusId"
DataTextField="strStatusDesc"
>
I am trying to get the value like this:
string notes=ddlProcessStatus.SelectedItem.Text;
I am getting null value here..How do i resolve it?
I have a DropDownList and I want to populate using a DataTable.
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But when appear the DropDownList show System.Data.DataRow why this don't show the real result of the DataTable ?
I have this webform with few fieldsin the search criteria,I added a new dropdownlist named "Company",I populated it with the data from the database, now when I click search choosing this criteria it doent work.
public partial class List : PrintablePage
{
private string CNUM;
private string CNAM;
private string CEL;
private string SD;
private string SDE;........
I have 2 - DropdownList controls, which i am filling at severside when page loads. After the user selection in DropdownList1, i am changing the contents in DropdownList2 values. This validation (i.e. changing the contents of Dropdownlist2 values) am doing in Javascript Clientside. But on postback i am not getting the values in DropdownList2. When i say "DropdownList2.Items.Count;" getting "0". I tried to put the contents of DropdownList2 in ViewState on pageload. But i am getting Serialization error at runtime "Viewstate["PersistValues"] = DropdownList2;". I am using html input hidden control to pass the values from server side to clientside for my validation. Now, to meet this requirement i am Binding the DropdownList2 at postback again with first DropdownList1's selected index (This is repeat of logic which i have done in Clientside).
View 5 RepliesI have just started with this . I am a new user and i want to know that why we cannot have multiple items selected in a DropDownList?
View 4 RepliesMy page has a gridview, and the gridview has a TemplateField called "Acciones" (Actions). The column Acciones has a ImageButton with CommandName "Select" and CommandArgument "Tutor". Thus, the GridView has controlled event "SelectedIndexChanged". The idea is that in GV_SelectedIndexChanged, I must to set DropDownList's SelectedValue property. But, the value seted in this function don't affect the rendered dropdownlist. The debugger talk's that the value is correctly seted, but the visual result don't.
View 4 RepliesI m unable to refersh my dropdownlist after inserting the records.
i m using this for textboxes...
finally
{
txtStdWeight.Text = string.Empty;
txtStdHeight.Text = string.Empty;
txtDisabilityPercentage.Text = string.Empty;
txtDisabilityDetail.Text = string.Empty;
txtFoodAllergy.Text = string.Empty;
txtMedicineAllergy.Text = string.Empty;
}
so how i set dropdownlist to "select" as default after inserting a record.
i'm using asp.net 3.5 and what im trying to do is create the dropdownlist item dynamically base on value in each datarow, then user select from dropdownlist and click button to postback, when postback system should be able to know what value has been selected by user. the problem with following code is during postback, event of "OnItem_Created" get fired and e.Item.DataItem return null, therefore the dropdownlist will not get populated with the items and that caused the dropdownlist unable to return value selected by user. am i missing anything? is "OnItemCreated" the best place to dynamic create the dropdownlist item?
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I am trying to hide 2 buttons depending on the value in the dropdownlist. It works when the page is initially loaded but chokes when returning to the page sometimes. I have some pretty simple code in the Page_Load event within an If Not Page.IsPostBack statement
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I m using the following code to bind dropdownlist using ADO.NET
Code:
Protected Sub HeadsData()
Dim conn As SqlConnection
Dim cmd As SqlCommand
Dim reader As SqlDataReader
Dim constr As String = ConfigurationManager.ConnectionStrings("ams").ConnectionString
conn = New SqlConnection(constr)
cmd = New SqlCommand("Select HeadId,HeadName from Heads Order By HeadName", conn)
conn.Open()
reader = cmd.ExecuteReader()
While reader.Read
cmbType.DataSource = reader
cmbType.DataTextField = "HeadName"
cmbType.DataValueField = "HeadId"
cmbType.DataBind()
End While
End Sub
I have 5 records in Heads table, but when i run the project it misses the first record and shows the remaining 4 in dropdownlist. Is there anything worng with this code ?
I'm trying to set a property on a custom DropDownList:
<custom:ReferenceDropDownList ... ValidityDate="<%# Application.CreateDate %>" />
Even though I can see that Application.CreateDate has been set in the Page_Load method on the containing UserControl, the code-behind in the DDL never seems to pick it up.
protected override void OnLoad(EventArgs e)
{
// this.ValidityDate is always null
}
This is even the case with ValidityDate="<%# DateTime.Now %>". The property of the DDL is declared like this:
[Category("Data")]
[DefaultValue(null)]
public DateTime? ValidityDate { get; set; }
what is the correct sequence I should be following here. I thought that a DDL would evaluate a cynamic property value like that without too much trouble.
I am trying to get two cascading dropdownlist to work but cannot get either to populate. How do I de-bug this? I'm not getting any errors, just blank dropdowns.
I've been trying to fill in webservice from SQL Server. But in-case this was the problem. I found an example on this site to fill with test values, but this still does not work. Since I cannot even get first to populate, to simplify I'm just giving code for first dropdown and its function(s)
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I need to loop through a gridview and get the values of some dropdownlist controls at that time.I am binding the gridview from a datatable I created.
Code:
gvFields.DataSource = myDataTable
gvFields.DataBind()
Now I am going through the rows of the gridview manually and need to get the values. You can see I have tried different ways. How can I do this from clicking a button to get the values instead of any other event? I only get True or False returned instead of the text in the dropdownlist controls.
Code:
For X = 0 To gvFields.Rows.Count - 1
Dim chkBox As CheckBox = CType(gvFields.Rows(X).Cells(0).Controls(1), CheckBox)
If chkBox.Checked = True Then
Dim ColumnName2 As String = Trim(gvFields.Rows(X).Cells(1).Text)
[code]....
I am populating a DropDownList from a text file (class requirement).
The file is read in the Page_Load method and the DropDownList is populated then.
When I press the Submit button, throughout the process of the code it is supposed to get the SelectedIndex and use it to grab a value out of a List(Of ).
The thing is, nothing is ever passed through. I even setup an alert box and it passes right over the alert box and never even triggers it, but gives me an Index out of range error when it moves to the line right after the Alert.
Code:
Redacted to keep people from stealing classwork.
I specified DropDownStyle = "DropDownList", so that users are not allowed to enter text that does not correspond to an item in the list.but my problem is that I can not typed text in the combobox even if I type the text that corresponds to an element of the list of combobox!!
<asp:ComboBox ID="Cmb_unitte_filtre" runat="server"
AutoCompleteMode="SuggestAppend"
DropDownStyle="DropDownList" MaxLength="0" AutoPostBack="False" ></asp:ComboBox>
I have a slight issue I awas trying to fix for 2-3 days, but nothing I try works.
The scenario:
DetailsView control in edit mode, I pass parameters to the SqlDataSourceProducts (edit.aspx?id=2) and the data source selects the appropriate data and fills in the DetailsView form.
Except two drop down lists. These two DDLs (DDL2 and DDL3) are dependent on the previous DDL (DDL1) in the DetailsView.
when the selected value of the DDL1 changes, DDL2 and 3 change their lists and get bound to the database.
The problem is: when I edit something from the database, DDL2 and 3 appear empty and when I update any other field and leave these, they get blanked in the database.
My goal is to set the selected value of DDL2 and 3 to the values in the database WHERE ID = QueryStringField="id".
I can go for not binding the data unless the field is changed, but does not sound professional and user friendly.
code:
The SqlDataSource used to select the parameters from the table and populate the DetailsView
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The code of the fields that hold the DDLs in the DetailsView control
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The codebehind:
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I'm having a problem sorting a dropdown that I've bound to a SQL Server data source. I've narrowed the problem down to the fact that I have a static item at the top of the dropdown with the data-bound items appended afterwards. If I remove the static item (<asp:ListItem Value="-1" Text="All" />) the ORDER BY part of the select clause works fine. How can I get around this issue? What I would like is to have the "All" static item at the top of the list with the data-bound items sorted alphabetically afterwards. I'm using Visual Studio 2010 and ASP.NET 4 if it makes any difference.
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* i binded dropdown value from database in gridview
* then display the value in next column based on selecting dropdown value
* when i click add new row button . could not bind the dropdown value.
below are my code
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<contenttemplate> <asp:Label ID="Label1" runat="server" Text="2"></asp:Label>
<asp:gridview ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
[code]....
We bind dropdown using json and web service but when we click on save button we can not get selected value of that dropdown...
View 1 RepliesI am trying to pass a collection of Dropdown controls as a parameter to a method which takes a collection of type Control as input. While executing I get the following error:
"Unable to cast object of type 'd__a31[System.Web.UI.WebControls.DropDownList]' to type 'System.Collections.Generic.IEnumerable1[System.Web.UI.Control]'."
My code:
[code]....
I have 2 table in database 1-State 2-City and bind DropDownList 1-ddlstate 2-ddlCity from these table and when I select item from ddlsate , according to my selected item from ddlState , ddlcity's Item change I used OnSelectedIndexChanged for ddlstate
problem is: I enter some data in tables with persian Alphabet now when I select some Item from ddlstate that contain these alphabet in persian "ی ،پ،... " it didn't show any Item in ddlcity but when I select item that didn't contain above alphabet it show item in ddlcity correctly why this happen?
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
-subject_name
-subject_code
-venue
-time
-seat_no
-admission_no
-subject_id
when I click the subject_name,I want it to appear in a gridview
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();
}
}
Currently,below is my code.
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source= E\SQLEXPRESS;" + "Initial Catalog=k;Integrated Security=SSPI");
SqlDataAdapter adapSel;
string mySQL = "select column_name from information_schema.columns where table_name='examtimetable' '" + dd_list + "'";....
I receive an error "Incorrect syntax near 'System.Web.UI.WebControls.DropDownList'."
protected void DDLzone1_SelectedIndexChanged(object sender, EventArgs e)
{
BindDistrict();
}
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here when i click on ALL item from ddlzone1 it just "ALL" item in ddldistrict
i want when i select "ALL" item from ddlzone1 in ddldistrict14 show all data from database
i have 3 drop down list in my page
1-ddlzone1
2-ddldistrict1
3-ddlstore1
this is ddlzone1 code
protected void DDLzone1_SelectedIndexChanged(object sender, EventArgs e) {
DDLstore1.Items.Clear();
DDLstore1.Items.Add(new ListItem("select center", ""));
DDLstore1.AppendDataBoundItems = true;
SqlCommand _cmd = new SqlCommand("selectcenter", _cn);
[CODE].....