Data Controls :: Unable To Bind DropDownList When New Row Is Added Dynamically To GridView
Oct 9, 2012
* 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]....
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Similar Messages:
May 18, 2010
I'm dynamically adding a DropDownList to the GridView in edit mode and I have set the TextBox Visibility to False. In edit mode I can see the DropDownList and I'm able to select an Item from the DropDownList but not able to access the SelectedValue in RowUpdating Event. How to get the selectedvalue of this DropDownList?
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow And (e.Row.RowState And DataControlRowState.Edit) > 0 Then
Dim ddl as DropDownList
FillStateList(ddl)
e.Row.Cells(4).Controls.Add(ddl)
ddl is the DropDownList that is added dynamically. And the default Textbox that is in the Edit mode is set to invisible. So there are actually two controls in the same cell in edit mode(TextBox is invisible).
DirectCast(Gridview1.Rows(e.RowIndex).FindControl("ddl"),DropDownList).SelectedValue
If I use the above statement I'm getting NullException.This is Probably because its a BoundField. Is there a way I can access the DropDownList 'ddl' SelectedValue?
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Oct 2, 2013
I have a problem ,i want to 2 dropdownlist box on a form and one will take loaded from data at the time of pageload and data of second dropdownlist box will change according to selected item in first dropdownlistbox ,and after that gridview will dynamicaly bind from some data according to choosen data of second dropdownlistbox .
I uses lots of code but i am not able to dynamicaly bind dropdown and gridview
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Feb 22, 2013
I created 3 category table. categry1,categry2,categry3. product table.
And then use of gried view add ,edit ,update ,delete product . in product table.
In gridview retrive data from product table . i select categry from dropdownlist in gridview categry1, categry2, categry3 and save update dropdown list category value dynamically in product table. not define value static in source code.
When select category 1 change on selected index change categary 2 or 3.
In my code I used text box to ediit update delete. but here i will use dropdownlist.
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Feb 7, 2011
I am just trying to add some dynamic controls to the SimpleQueryControl (which of course is a kind of Web Control and inherits all the methods accordingly). I dont know how to get the values of Child controls which I have added dynamically.
class RoomPickerQueryControl : SimpleQueryControl
{
protected override void OnLoad(EventArgs e)
{
if (!Page.IsPostBack)
{
EnsureChildControls();
mColumnList.Visible = false;
}
}
protected override void OnInit(EventArgs e).............................
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May 7, 2015
I want to add items DropDownList Csharp using For next loop
int i;
for (i = 1; i <= 4; i = i +1) {
DropDownList1.Items.Add(i.ToString());
}
Code not working.
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Sep 15, 2010
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
[Code]....
The code of the fields that hold the DDLs in the DetailsView control
[Code]....
The codebehind:
[Code]....
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Apr 24, 2010
I have ONE <asp:Button ID="btnAddUC" runat="server" ......./> and ONE <asp:Table ID="tblUC" runat="server"...> on my page. User clicks on btnAddUC, user control is added to the page [user can add 'n' user controls to the page]. here I have no problem, adding user controls to the page on user clicks.
My user control has ONE <asp:DropDownList ID="ddlItems" runat="server" ......./> and ONE <asp:CheckBoxList ID="chkItems" runat="server"..../>. I am exposing "ddlItems" by public method, "chkItems" is not exposed. "chkItems" is binded on SelectedIndexChanged event of "ddlItems".
Execution scenario:
User adds user control to the page, select item from the "ddlItems" ( Note: "ddlItems" is exposed by public property ) , "chkItems" is populated ( using ddlItems.SelectedItem.Value ) . User checks some checkboxes in "chkItems" and then decide to add one more user control. When the second user control is added to the page, checkboxes in the first usercontrol lose their state and apeears unchecked (NOTE: user checked some checkboxes and then added another user control).
I want to put checked beckboxes index in session ( Before another control is added, which event I should use, because at LOAD event there is nothing).
I was able to restict SelectedIndexChanged event to only that user control whcih generated it (checking _EVENTTARGET)
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Jan 3, 2010
I have a nested gridview dynamically added. It seems I resolved all issues with the loading this control on a parent page along with other controls and I can trigger the edit of the first level - the master part of the gridview. However, I cannot trigger the edit on a child gridview.
OnRowEditing="grdChildGridEdit_RowEditing"
The master and the child gridviews have objectdatasources in a markup but I have to do the additional data binding after the loading the control on the parent page (see the code below). I'm doing that additional data binding only for the master gridview that is working fine and shows the data for the master and the child gridviews. When I click the Edit button on the master gridview it shows text boxes for the editing but when I click the Edit button on the child gridview it's doing nothing and moreover the editing mode for the master gridview is going back to the initial stage (labels).
I was trying to trigger it throughuse the registering the event:
[code]....
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Oct 9, 2012
Using dropdown in gridview and bind the values in dropdown then based on dropdown display the value in another column.
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Feb 22, 2010
I have something simple but for some reason it's not working.
On my OnRowCommand I am doing a DataBind but for somereason my Grid always stays blank.
I chceked in the Debug and It gets the data fine
this.GridView1.DataSource = recruitmentTemplateCandidates; // there is data here.
GridView1.DataBind();
after that it goes to OnPreRender and then nothing shows up in the Grid. why is that?
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Mar 28, 2010
i am wking on an assignment in which i have a gridview that contain deptno in a dropdownlist.by selecting a particular deptno from that dropdownlist,the number of employee of that department displayed in second dropdownlist that is for displaying employyee of a department.And after selecting the employee its salary detail and date of joining displayed in textboxes?we have two database table one is for employee(fields are deptno,empname,salary,joining date,status(true/false))and second department(fields are deptno,deptname,location);;;
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Oct 29, 2012
How can I bind dropdown list values as gtidview header in asp.net
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Oct 28, 2010
I have list of addresses and would like to bind ZIP Id to DropDownList.
when I use SelectedValue property it throw the error: 'DropDownList1' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value.
[Code]....
aspx.cs code:
[Code]....
Classes:
[Code]....
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May 30, 2013
Way to enclose one Dropdownlist there for the Gridview?
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May 7, 2015
With reference to : [URL] ....
No you cannot add a third parameter in the Dictionary. It contain Key Value pair data.But if you want to add third parameter then simply use DataTable and add these in the DataTable row.Name of Builder , Title Of Buidler , Builder ID
So how to acheive that task ? so far i did like this :
public void AddNewCMP(string PersonName , string PersonID , string PersonTitle) {
var dt = new DataTable();
if (ViewState["CMPDataTable"] != null) {
dt = (DataTable)ViewState["CMPDataTable"];
[Code] ....
Now on button click i want to add six drop down values to AddNewRow(value1,value2,value3) method .... how to do that ?
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Dec 24, 2010
On adding items in it ,shows an error: "Dropdownlist does not allow multiple selection."But when i tries to print the selected item it shows null exception.
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Dec 24, 2010
using System;
using System.Collections;
using System.Configuration;
[code]...
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Sep 6, 2013
I have requirement to bind ASP.Net DropDownList control in EditItemTemplate of GridView.
I preferred the tutorial:
[URL]...
i have followed same steps just but difference is i have a edit imagebutton with commandname="Edit".Also dropdown needs to be binded from different table(directory) and not the table through whicch grid is binded(details).
if (e.Row.RowType == DataControlRowType.DataRow && (e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit && GridView1.EditIndex == e.Row.RowIndex)
{
DropDownList DStatusEdit = (DropDownList)e.Row.FindControl("DStatusEdit");
string query = "select distinct status from directory";
SqlCommand cmd = new SqlCommand(query);
DStatusEdit.DataSource = GetData(cmd);
[CODE]..
the page is running but when i click edit image button the dropdwn shows but no data in dropdown binded it is empty.
My gridview is inside update panel.
How can i achieve this?
Should dropdownlist in my case be binded inside rowcommand and how?
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Dec 31, 2012
URL...
<asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="false" CssClass="Grid"
onrowdatabound="gvCustomers_RowDataBound" Width="100%"
onrowcommand="gvCustomers_RowCommand" >
<RowStyle HorizontalAlign="Center" />
<AlternatingRowStyle HorizontalAlign="Center" />
<Columns>
<asp:TemplateField>
[code]....
and also i tried
GridView gvchild = e.Row.FindControl("gvOrders") as GridView; drplist = gvchild.FindControl("drp1") as DropDownList; // den also same error object reference not set to an instance of an obj
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Nov 19, 2010
I have a Gridview and two link button in that GridView , one link button click is to add edit row ( Edit ), one link button click is to select row ( Select ). I have a dropdownlist inside row which selected when i click link button Select in the gridview edit template, as of my business logic i need to show the dropdownlist only when the user clicks Edit button and when the user clicks Select button . That mean when the user clicks Select button then they clicks Edit button on the gridvview i should allow him to edit the dropdownlist (showing the value to the user through a label).
ASPX CODE
[Code].... C#
When I click Select link button , then I click Edit link button . They have errors : Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index" I don't know what error?. How to fix it
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Oct 21, 2010
I'm unable to get the check box value from dynamically created gridview in vs2010. I'm using the ITemplat class to create the templat column.
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Dec 9, 2010
Girdview has dropdownlist TemplateField called ddlSate, how to bind state field value in sql table to selected value of ddlState dropdownlist control? For example the sql table has AL value for state field, (Note by default ddlState lists all states options with sqldatasource), how AL is selected in ddlState when binding to ddlState?
Secondly, when user selects different state like GA, how below update stored precedure works? that means how to find ddl selected value in update procedure as shown below question mark line:
Here is part code:
<asp:GridView ID="gvOrder" runat="server" DataSourceID="ods1" AutoGenerateColumns="False"
style="margin-top: 11px" CssClass="pnlOrdercss" ScrollBars="Both"
BorderColor="Black" BorderWidth="1px">
<Columns>
[Code]....
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Aug 28, 2010
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 ?
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Sep 16, 2010
I got GridView with 2 columns both are Template field with drop down list. What I need to do is someting like when user select course 3/3A/2A/2B , the type column will auto select pratical option dynamically. When select RTT /FTT/BTT , the type column will select Theory option. Can someone tell me how to work on this thing.
<asp:GridView
ID="GridView1"
runat="server"
AutoGenerateColumns="False">
<Columns>
<asp:TemplateField
HeaderText="Course">
<ItemTemplate>
<asp:DropDownList
ID="DropDownList1"
runat="server"
AutoPostBack="True">
<asp:ListItem>2A</asp:ListItem>
<asp:ListItem>2B</asp:ListItem>
<asp:ListItem
Value="3">3</asp:ListItem>
<asp:ListItem>3A</asp:ListItem>
<asp:ListItem>BTT</asp:ListItem>
<asp:ListItem>RTT</asp:ListItem>
<asp:ListItem>FTT</asp:ListItem>
<asp:ListItem></asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField
HeaderText="Type">
<ItemTemplate>
<asp:DropDownList
ID="DropDownList2"
runat="server">
<asp:ListItem></asp:ListItem>
<asp:ListItem>Practical</asp:ListItem>
<asp:ListItem>Theory</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
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