I have a GridView containing records from a table which can be deleted or updated. If you want to edit a row, it should display the update and cancel buttons so that you can keep or cancel the current edit (I hide update and cancel as default). I am using the following asp for the button column of the GridView:
<asp:TemplateField visible ="true" >
<HeaderTemplate>
<div id = "header">Maintain</div>
[code]...
I'm using VWD 2010 Express and have found that when I change a property like AutoPostBack from within the property window the corresponding tag (<asp:TextBox...>) was not updated with the property change to the tag.
Is there a setting that I can change in the VWD properties that will enable changes through the property window for a control to automatically update the HTML tag for that control?
I am a ASP.Net Web Forms developer and new in MVC. I observed that MVC reccommend not to have code behind file. In Web Forms, we handle events in code behind then change properties of various controls there. How to do the same in MVC? For example, if I have to change back color of a label on click of a button then how to do this in MVC?
View 4 RepliesI have a button in a details view that I want to change the properties of at run time. When the user clicks the edit button the details view goes into edit mode. I also want the edit button to turn into an update(or save) button so the use can click it to persist the changes done in edit mode. I've had to create a new instance of the button which I can do. I've done that with the cast below, I assume this is a good way to do this. I'm now having difficulty assigning the properties. I tried this but get a "Object Reference not set to an instance of an object" error. I thought I was working with an instance of the object in the code below, but the compiler doesn't agree. How do I set the text, and other properties for my button instance?
[Code]....
I have a vb.net class with properties defined as follows:
Private m_Property1 As String
Public Property Property1() As String
Get
Return m_Property1
End Get
Set(ByVal value As String)
If IsNothing(value) Then
m_Property1 = String.Empty
Else
m_Property1 = value
End If
End Set
End Property
I can then set the values as follows:
classname.Property1 = "myvalue"
How do I set the value of a property that is defined dynmically eg
Dim strPropertyName As String = "Property1"
I have a grid control and i want to delete a row dynamically and update the gridview when i have click on submit button, but am getting issue,when am clicking the sumbit button the grid retain the deleted rows(while deleting its disapper).
here the code(the delete event triggerd from command args)and the gridsource am using the list which loads the exisiting datas
[Code]....
I have the following situation:My business class:
public class Foo
{
public String A {get;set;}
public DateTime B {get;set;}
// .. and other properties like
public String Intern {get;set;}
}
I'm binding that Item to a DetailsView in Editmode. (I bind a List containing a single object of Foo, becuase I do recall that I can only bind IEnumerable<> classes to the DetailView)The binding is done via a ObjectDataSource
I created a gridview that is bound with an SQL datasource - I added a gridview button column. I need to update/insert 'Y' on a specific cell in the row when I press the button
This is my gridview code
[code]....
The button column I have says delete on it but it shouldn't really delete it - Once I press the button it puts a 'Y' on a column that is filtered out by my sql statement in the sql datasource
I have a datagrid that is displaying data that is being returned from a stored procedure. That works fine. The problem is that I want to do sorting. I know that there is sorting functionality in the grid, however, I don't want to go back to the server and get a new set of data. What I want to do is just re-sort the data that is already being displayed.
Basically, I couldn't not find an easy solution to this issue. I tried updating my dataGrid to a gridView control and even that (for my particular issue) was difficult. I wound up un-doing all the changes and just adding another grid that had just the data I wanted for the requirement. If anyone else has an issue like this I would recommend taking it out of a datagrid and writing it in jQuery. I could of written a table that had the data I wanted (and fully sortable using a plug-in mentioned below) in 15 minutes compared to the hours I spent trying to jam a square peg into a round hole.
what is the best way of updating to db only the changed rows using gridview?i have a gridview control that has inline editing and when the user edit the row there are two options "Update" or "Cancel" so user might just click update button without really updating the row...how can i make sure that, user really changed the row?
View 2 RepliesI am in need of some assistance in regards to how to best set the values of properties for a Web User Control which is being included into a cell of a GridView with dynamically created columns. I have tried a few different approaches, but can't seem to get a satisfactory result. Also, to be completely honest, I am not really sure if I am using best practices for what I am trying to accomplish.
First off a little background:I have a GridView for which we will never know the exact number of columns at run time. The columns are predicated by user selection. I am creating the command text for the DataSet on the fly and then looping through the columns of the resulting DataTable in order to use custom TemplateFields. This works ok for just printing out the row values but not so much for when I need to insert the Web User Control into a cell.The Web User Control is in essence a collection of image links which are used as a "Quick Nav" tool. I need to pass the values of 2 fields from each DataRow to the control via properties (for example, CustID and ProductID). I am using custom TemplateField classes inheriting from ITemplate for displaying my fields and extending the DataBinding event like so: [Code]....
This won't work for my User Control as DataBinding is called after the control is loaded into the page and I need the properties to be set before the Page_Load event of the control is fired.Is there a GridView event I should be looking into instead such as RowCreated or RowDataBound? Or should I modify how I loop through the DataTable by doing rows first, then the resulting columns as I've seen done elsewhere?
I am sure I am not the first to ask this question but I cannot find an answer in these or any other forums. I guess I am not wording the question right. In short I have a gridview populated but a database via an SQLDatasource. I have an Edit column in the datagrid and an updatequery in the datasource. When the Edit is click the line goes into edit mode, the user then clicks Update and I get an error. Could not find control 'DropDownList1' in ControlParameter 'Frequency'. The only complication is that there is a drop down control when the "EDIT" column is selected. The dropdownlist gets it list from another SQLDatasource. This all works fine. Here is the code snip:
<asp:GridView ID="GridView1" runat="server" AllowSorting="True" AutoGenerateEditButton="True"
I am using fileuploader control in gridview template control's edittemplate but the problem is when i press edit button fileuploader control and update other controls such as textboxes and press update button there is no value for Fileuploader control so i need the value of image control that is in itemtemplate so i pass it as a parameter.
here is my code
<asp:GridView CssClass="mGrid" ID="grdviewAvailForum"
runat="server" AutoGenerateColumns="False"
DataSourceID="objDtsrcAddForum" DataKeyNames="ForumID" [code]....
now here in else i need the old values,how i can get it.
I have a gridview bound to a sqldatasource with editing enabled. If I click Edit, then either Cancel or Update, the update or cancel occurs and the Edit button reappears. However, I cannot then click the browser's back button without having the Update and Cancel buttons reappear. A second click of the back button takes me to a state where the Edit button shows again, *then* another back button click will take me to the referring page (the one before the one with the gridview on it.) IOW, it looks like the postbacks are cached. How can I prevent this and have the back button go straight to the referring page?
View 4 RepliesI have this code:
<asp:GridView ShowFooter="true" DataSourceID="odsRooms" Width="700" DataKeyNames="id,locationid" ID="gvRooms" GridLines="None" PageSize="10" runat="server" AllowSorting="true" AllowPaging="True" CellSpacing="4" AutoGenerateColumns="False" >
<Columns>
<asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderStyle-VerticalAlign="Bottom" >
<ItemTemplate>
<%# Eval("roomname")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbRoomname" MaxLength="20" Text='<%# Eval("roomname")%>' runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderStyle-VerticalAlign="Bottom">
<ItemTemplate>
<%# Eval("sqmeters")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbSqmeters" MaxLength="6" Width="60" Text='<%# Eval("sqmeters")%>' runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-HorizontalAlign="Left" >
<ItemTemplate>
<%# Eval("persreception")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbPersreception" MaxLength="6" Width="60" Text='<%# Eval("persreception")%>' runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderStyle-VerticalAlign="Bottom" >
<ItemTemplate>
<%# Eval("persdiner")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbPersdiner" Text='<%# Eval("persdiner")%>' MaxLength="6" Width="60" runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderStyle-VerticalAlign="Bottom" >
<ItemTemplate>
<%# Eval("persparty")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbPersparty" Text='<%# Eval("persparty")%>' MaxLength="6" Width="60" runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderStyle-VerticalAlign="Bottom" >
<ItemTemplate>
<%# Eval("descriptiontext")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbDescriptiontext" Text='<%# Eval("descriptiontext")%>' TextMode="MultiLine" Rows="2" Columns="28" runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowDeleteButton="true" DeleteText="Delete" ShowEditButton="true" EditText="Edit" CancelText="Cancel" />
</Columns>
</asp:GridView>
<asp:ObjectDataSource ID="odsRooms" InsertMethod="InsertRoom" DeleteMethod="DeleteRoom" UpdateMethod="UpdateRoom" runat="server" SelectMethod="GetLocationRoomsPagedSorted" SelectCountMethod="GetLocationRoomsCount" SortParameterName="sortExpression"
TypeName="locationsBLL" EnablePaging="true">
<DeleteParameters>
<asp:Parameter Name="id" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:ControlParameter ControlID="tbRoomname" PropertyName="Text" Name="roomname" Type="String" />
<asp:ControlParameter ControlID="tbSqmeters" PropertyName="Text" Name="sqmeters" Type="String" />
<asp:ControlParameter ControlID="tbPersreception" PropertyName="Text" Name="persreception" Type="String" />
<asp:ControlParameter ControlID="tbPersdiner" PropertyName="Text" Name="persdiner" Type="String" />
<asp:ControlParameter ControlID="tbPersparty" PropertyName="Text" Name="persparty" Type="String" />
<asp:ControlParameter ControlID="tbDescriptiontext" PropertyName="Text" Name="descriptiontext" Type="String" />
<asp:Parameter Name="id" Type="Int32" />
</UpdateParameters>
</asp:ObjectDataSource>
And get this error when I click 'Edit' and then 'Update':
Server Error in '/' Application. Could not find control 'tbDescriptiontext' in ControlParameter 'descriptiontext'.Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: Could not find control 'tbDescriptiontext' in ControlParameter 'descriptiontext'.
Source Error:
[Code]....
Stack Trace:
[Code]....
[InvalidOperationException: Could not find control 'tbDescriptiontext' in ControlParameter 'descriptiontext'.]
System.Web.UI.WebControls.ControlParameter.Evaluate(HttpContext context, Control control) +2961386
System.Web.UI.WebControls.Parameter.UpdateValue(HttpContext context, Control control) +152
System.Web.UI.WebControls.ParameterCollection.UpdateValues(HttpContext context, Control control) +113
System.Web.UI.WebControls.ParameterCollection.GetValues(HttpContext context, Control control) +47
System.Web.UI.WebControls.ObjectDataSourceView.ExecuteUpdate(IDictionary keys, IDictionary values, IDictionary oldValues) +1204
System.Web.UI.DataSourceView.Update(IDictionary keys, IDictionary values, IDictionary oldValues, DataSourceViewOperationCallback callback) +3636597
System.Web.UI.WebControls.GridView.HandleUpdate(GridViewRow row, Int32 rowIndex, Boolean causesValidation) +1336
System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +641
System.Web.UI.WebControls.GridViewRow.OnBubbleEvent(Object source, EventArgs e) +164
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +52
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3691
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
i have asp.net chart control and gridview control in updatepanle my issue is when i click on edit link in gridview my chart control is not displaying but when i refresh my page iam to see it why is so??
View 1 RepliesWhy custom Gridview control not render html properlies under <Columns> properly in Visual Studio 2005?
For example:
[code]....
I'm having a weird problem where the GridView cell that I'm programmatically updating turns grey, and throws a null error when attempting to save row. I have been searching all day and have not been able to find a solution. I'm guessing there is a problem with my code, so here it is:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
I need to access a control inside a repeater and change its properties. To enable it or not. I got an erorr message Object reference not set to an instance of an object. Here is my code inside a method. protected void
rptCAP_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
LinkButton lnDel = (LinkButton)rptCap.FindControl("lnkDelete");
lnkDel.Enabled = false; //<<<<< this is where the error occur
}
The name of the repeater control is id="rptCAP"
Anyone have this problem. When you write a ex. label name or label text in the properties window, it look like its updating the text before you actually are finish. This make you type over what you allready wrote. Its not a big problem,
View 2 RepliesRetrofitting ASP.NET WebForms themes to an old application I have a need to theme an <input> tag such that the JavaScript click event is different for each theme. I replaced with tag with an asp:Button, only to disciver that the OnClientClick property is not themeable.
View 1 RepliesI have applied rounded corners styles to my ASP.Net button & text box controls and also to fieldset and legend.
[Code]....
But these styles aren't working in Internet Explorer(8,7,6). Please let me know any solution so that all of these styles will apply on these elements(asp.net button & textbox, fieldset & legend) in IE too!
If a composite server control normally encapsulate styling information inside, it is an example of code encapsulation and modularization. However if css properties are included inside the composite control, it is not ideal for code/styling separation and css code re-use principles. Now which consideration should be the main consideration?
View 2 RepliesI'm trying to set up an update button to update the infomation in my database using a stored procedure and method with the following code but when I click the button it doesn't add the updated text so i debugged the code and saw that the line "bool success = DataAccess.UpdateAboutUs(ID.Text, txtHeader.Text, txtHeader2.Text, txtDescription.Text);" was still taking the text that was loaded into the textboxes.
my web form is
[code]....
I have added a few WebUserControl's to a form and I want to check their properties values in a code behind (vb) when a user click a button.I tried unsuccessfully to get a reference to these controls using the TypeOf and GetType functions...How do I get a reference to the webUserControls ?
View 5 Replies