Questions on UI for WinForms Forum

2 answers

231 views

Databinding Drop down list based on another dropdown list

Hi guys,
I am getting this strange error and I am really pulling my hair at the moment. My scenario is simple. I have a drop down list for Categories. When the user Selects and category, I populate another drop down list of subcategory based on the selected category.
Here is the code

private void ddlCategory_SelectedIndexChanged(object sender, Telerik.WinControls.UI.Data.PositionChangedEventArgs e)

{

this.PopulateSubCategories();

}

private void PopulateSubCategories()

{

DataTable dtSubCategories = new SubCategory().GetSubCategoryByCategoryID(Convert.ToInt64(ddlCategory.SelectedItem.Value));

DataRow dr = dtSubCategories.NewRow();

dr["ID"] = 0;

dr["Name"] = "Any";

dr["CategoryID"] = 0;

dr["isACtive"] = true;

dtSubCategories.Rows.InsertAt(dr, 0);

this.ddlSubCategory.DataSource = dtSubCategories;

this.ddlSubCategory.DisplayMember = "Name";

this.ddlSubCategory.ValueMember = "ID";

this.ddlSubCategory.SelectedIndex = 0;

}

The problem is that ddlCategory.SelectedItem.Value statement throws exception, Unable to cast object of type 'System.Data.DataRowView' to type 'System.IConvertible'. If i skip this function first time and change the index to some other than it works fine. Why is it not returning the SelectedValue on first bind
Thanks
Afraz Ali

DropDownList

answered on 17 Mar 2011

2 answers

172 views

Grid view without horizontal scroll bar problem

Hello,

I encounter very strange problem while using the Telerik GridView.
I am creating the gridview on the fly & then populating the data in those gridviews.

Bydefault I am showing one row in each gridview as selected through programming.
The grid which contains the horizontal scroll bar & when I am looking at the source code of that grid, I am getting the following value which I am using in my jquery to findout the selected index of that specific grid from the 'value' attribute.

<input name="rg_02635_ClientState" id="rg_02635_ClientState" type="hidden"

autocomplete="off"

value="{"

selectedIndexes":["33"],"reorderedColumns":[],"expandedItems":[],"expandedGroupItems":[],"expandedFilterItems":[],"deletedItems":[],"scrolledPosition":"768,0","popUpLocations":{},"draggedItemsIndexes":[]}"/><

BR><BR>

But for the grid which doesn't contain the horizontal scroll bar & when I am looking at the source code of that grid, I am getting the following value, even if I have selected row in the grid.

<input name="rg_02637_ClientState" id="rg_02637_ClientState" type="hidden"

autocomplete="off"/><BR>

Strange thing is, if I select the highlighted row one more time manually, then I am able to see the following value.

<input name="rg_02637_ClientState" id="rg_02637_ClientState" type="hidden"

autocomplete="off"

value="{"

selectedIndexes":["0"],"reorderedColumns":[],"expandedItems":[],"expandedGroupItems":[],"expandedFilterItems":[],"deletedItems":[],"scrolledPosition":"0,0","popUpLocations":{},"draggedItemsIndexes":[]}"/><

BR>

Why is this strage behaviour? How do I get the selectedIndex for the grid which doesn't contain horizontal scroll.

Looking forward to your response.

Best Regards,
Vishal

GridView

answered on 17 Mar 2011

2 answers

334 views

RadGrid.MasterTableView.Columns.Clear() and RadGrid..Columns.Clear() don't work

Good morning!

My version of the telerik is RadControls for ASP.NET Ajax 2010 Q3.

I'm trying to remove columns that are inserted with the command gridProntuarios.MasterTableView.Columns.Add() of grid through the command "gridProntuarios.MasterTableView.Columns.Clear();" and
"gridProntuarios.Columns.Clear();" but don't work.

What would the solution for this trouble?

Thanks!

GridView

answered on 17 Mar 2011

1 answer

121 views

Drag&Drop from RadGridView to RadPanel

Please, see the subject.

Is it possible? Any help, please.

GridView

answered on 17 Mar 2011

1 answer

73 views

Incorrect display of appointments when mutiple appointment are created with concurrent start and end time

Hi,

i create an appointment with Start time: 9:00 Am 10-Mar-2011 and End time 9:05 Am 10-Mar-2011. Another appointment is also create on the same day with Start time: 9:10 Am 10-Mar-2011 and End time 9:15 Am 10-Mar-2011. In Week view, scheduler shows the second appointment in 11-Mar-2011 column. I want the second appointment to be shown on the 10-Mar-2011 column since its the appointment for that day.
I am using RadControl Q1 2010 SP2 version. Please specify the solution for this version, since its the version that is available in our organization. Please consider this urgent since this is a very critical issue for our application

Regards
Nitin

Scheduler and Reminder

answered on 17 Mar 2011

4 answers

145 views

What event fires on multiselect ?

I have a listcontrol set to MultiExtended. When the user clicks on an item the SelectedIndexChanged event fires. However, if the user holds the shift key down and clicks another item, selecting all items between clicks, the event does not fire. I need to know that the user just added items to the SelectedItems list. What event can I use? Thanks

Later
Art

ListControl

answered on 16 Mar 2011

3 answers

135 views

Text Property Bug

I am experiencing the follow problem with the MultiColumn ComboBox control.
First I setup the MultiColumn ComboBox as follows:

    
            CategoryRadMultiColumnComboBox.DataSource = _categoriesBindingSource; 
        
            CategoryRadMultiColumnComboBox.DisplayMember = "CategoryName"; 
        
            CategoryRadMultiColumnComboBox.ValueMember = "CategoryId"; 
        
            CategoryRadMultiColumnComboBox.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList; 
        
            RadMultiColumnComboBoxElement categoriesElement = CategoryRadMultiColumnComboBox.MultiColumnComboBoxElement;           

            categoriesElement.EditorControl.MasterGridViewTemplate.AutoGenerateColumns = false;        

            categoriesElement.EditorControl.MasterGridViewTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;            

            categoriesElement.EditorControl.MasterGridViewTemplate.Columns.Clear(); 
        
            categoriesElement.Columns.Add(CreateGridViewDataColumn("StandardId")); 
        
            categoriesElement.Columns.Add(CreateGridViewDataColumn("CategoryId")); 
        
            categoriesElement.Columns.Add(CreateGridViewTextBoxColumn("#", "CategoryNumber", 30, 30)); 
        
            categoriesElement.Columns.Add(CreateGridViewTextBoxColumn("Name", "CategoryName", 100));

On the SelectedIndexChange event of another ComboBox I set the filter for the datasource as follows:

    
            private void StandardRadMultiColumnComboBox_SelectedIndexChanged(object sender, EventArgs e) 
        
            { 
        
                        RadMultiColumnComboBox cbo = (RadMultiColumnComboBox)sender; 
        
                        _categoriesBindingSource.Filter = String.Format("StandardId = '{0}'", cbo.SelectedValue.ToString()); 
        
                        RadMultiColumnComboBoxElement categoriesElement = CategoryRadMultiColumnComboBox.MultiColumnComboBoxElement; 
        
                        if (categoriesElement.Rows != null && categoriesElement.Rows.Count == 0 && CategoryRadMultiColumnComboBox.SelectedItem != null) 
        
                        { 
        
                            CategoryRadMultiColumnComboBox.SelectedItem = null; 
        
                            CategoryRadMultiColumnComboBox.SelectedValue = null; 
        
                            CategoryRadMultiColumnComboBox.Text = " "; 
        
                        }             
        
            }

Now when the filtering results in 0 rows in the DataSource the Text property retains the previous value and I can not seem to clear it not matter what properties I change.

MultiColumn ComboBox

answered on 16 Mar 2011

1 answer

123 views

Insert, Update and delete records from xml file

Hello,

I'm a new developer of winforms.
I'm trying to insert, update and delete records from the following xml file using the treeview control (I'm using the 2009.3.9.1203 version):

"

<?xml version="1.0" encoding="utf-16"?>

<uTemplateData xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://********************************************">

<GoodData xmlns:dppp2="http://***************************************************************************">

<dppp2:LVPrm>

<dppp2:Bnr i:nil="true" />

<dppp2:CCount>2</dppp2:CCount>

<dppp2:OSV>8542</dppp2:OSV>

<dppp2:ParentId>0</dppp2:ParentId>

<dppp2:RMM>2048</dppp2:RMM>

<dppp2:bName i:nil="true" />

<dppp2:bFvr>CHK</dppp2:bFvr>

<dppp2:customSName></dppp2:customSName>

<dppp2:hst>V42</dppp2:hst>

<dppp2:mPath i:nil="true" />

<dppp2:nNames xmlns:dppp4="http://********************************************************">

<dppp4:string>MyName</dppp4:string>

</dppp2:nNames>

<dppp2:nGuids xmlns:dppp4="http://*********************************************************">

<dppp4:string>My2Name</dppp4:string>

</dppp2:nGuids>

<dppp2:pArch>None</dppp2:pArch>

<dppp2:sType>ATUP</dppp2:sType>

<dppp2:uUM>false</dppp2:uUM>

<dppp2:vtName>5u_4{Counter}</dppp2:vtName>

<dppp2:vtType>mor</dppp2:vtType>

<dppp2:trIp xmlns:dppp4="http://**********************************************************">

<dppp4:mAd>73111160</dppp4:mAd>

<dppp4:mFam>InterNetwork</dppp4:mFam>

<dppp4:mHsh>0</dppp4:mHsh>

<dppp4:mNmb xmlns:dppp5="http://*********************************************************">

<dppp5:uShort>0</dppp5:uShort>

</dppp4:mNmb>

<dppp4:mScpId>0</dppp4:mScpId>

</dppp2:trIp>

<dppp2:tCrName>ctii_rl</dppp2:tCrName>

<dppp2:tEName>Nwa</dppp2:tEName>

<dppp2:tPName>AutoDefault</dppp2:tPName>

</dppp2:LVPrm>

<dppp2:LVPrm>

<dppp2:Bnr i:nil="true" />

<dppp2:CCount>2</dppp2:CCount>

<dppp2:OSV>8542</dppp2:OSV>

<dppp2:ParentId>0</dppp2:ParentId>

<dppp2:RMM>2048</dppp2:RMM>

<dppp2:bName i:nil="true" />

<dppp2:bFvr>CHK</dppp2:bFvr>

<dppp2:customSName></dppp2:customSName>

<dppp2:hst>V42</dppp2:hst>

<dppp2:mPath i:nil="true" />

<dppp2:nNames xmlns:dppp4="http://********************************************************">

<dppp4:string>MyName</dppp4:string>

</dppp2:nNames>

<dppp2:nGuids xmlns:dppp4="http://*********************************************************">

<dppp4:string>My2Name</dppp4:string>

</dppp2:nGuids>

<dppp2:pArch>None</dppp2:pArch>

<dppp2:sType>ATUP</dppp2:sType>

<dppp2:uUM>false</dppp2:uUM>

<dppp2:vtName>5u_4{Counter}</dppp2:vtName>

<dppp2:vtType>mor</dppp2:vtType>

<dppp2:trIp xmlns:dppp4="http://**********************************************************">

<dppp4:mAd>7311160</dppp4:mAd>

<dppp4:mFam>InterNetwork</dppp4:mFam>

<dppp4:mHsh>0</dppp4:mHsh>

<dppp4:mNmb xmlns:dppp5="http://*********************************************************">

<dppp5:uShort>0</dppp5:uShort>

</dppp4:mNmb>

<dppp4:mScpId>0</dppp4:mScpId>

</dppp2:trIp>

<dppp2:tCrName>ctii_rl</dppp2:tCrName>

<dppp2:tEName>Nwa</dppp2:tEName>

<dppp2:tPName>AutoDefault</dppp2:tPName>

</dppp2:LVPrm>

</GoodData>

</uTemplateData>

"
You see that the above xml is more complex than the xml file which supported the treeview (XMLSerialization demo).
So, I'm asking you as new developer of winforms to help me step by step in order to insert, update and delete records from the above xml.

If the treeview is not intended for supporing such xml files, Please, guide me how to achieve the requirement using another control.

It is appreciated to send me a code with an explaination.

Regards,
Bader

Treeview

answered on 16 Mar 2011

3 answers

168 views

Insert, update and delte records from xml file

Hello,

I'm a new developer of winforms.
I'm trying to insert, update and delete records from the following xml file using the radgridview control (I'm using the 2009.3.9.1203 version):

"

<?xml version="1.0" encoding="utf-16"?>

<uTemplateData xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://********************************************">

<GoodData xmlns:dppp2="http://***************************************************************************">

<dppp2:LVPrm>

<dppp2:Bnr i:nil="true" />

<dppp2:CCount>2</dppp2:CCount>

<dppp2:OSV>8542</dppp2:OSV>

<dppp2:ParentId>0</dppp2:ParentId>

<dppp2:RMM>2048</dppp2:RMM>

<dppp2:bName i:nil="true" />

<dppp2:bFvr>CHK</dppp2:bFvr>

<dppp2:customSName></dppp2:customSName>

<dppp2:hst>V42</dppp2:hst>

<dppp2:mPath i:nil="true" />

<dppp2:nNames xmlns:dppp4="http://********************************************************">

<dppp4:string>MyName</dppp4:string>

</dppp2:nNames>

<dppp2:nGuids xmlns:dppp4="http://*********************************************************">

<dppp4:string>My2Name</dppp4:string>

</dppp2:nGuids>

<dppp2:pArch>None</dppp2:pArch>

<dppp2:sType>ATUP</dppp2:sType>

<dppp2:uUM>false</dppp2:uUM>

<dppp2:vtName>5u_4{Counter}</dppp2:vtName>

<dppp2:vtType>mor</dppp2:vtType>

<dppp2:trIp xmlns:dppp4="http://**********************************************************">

<dppp4:mAd>73111160</dppp4:mAd>

<dppp4:mFam>InterNetwork</dppp4:mFam>

<dppp4:mHsh>0</dppp4:mHsh>

<dppp4:mNmb xmlns:dppp5="http://*********************************************************">

<dppp5:uShort>0</dppp5:uShort>

</dppp4:mNmb>

<dppp4:mScpId>0</dppp4:mScpId>

</dppp2:trIp>

<dppp2:tCrName>ctii_rl</dppp2:tCrName>

<dppp2:tEName>Nwa</dppp2:tEName>

<dppp2:tPName>AutoDefault</dppp2:tPName>

</dppp2:LVPrm>

<dppp2:LVPrm>

<dppp2:Bnr i:nil="true" />

<dppp2:CCount>2</dppp2:CCount>

<dppp2:OSV>8542</dppp2:OSV>

<dppp2:ParentId>0</dppp2:ParentId>

<dppp2:RMM>2048</dppp2:RMM>

<dppp2:bName i:nil="true" />

<dppp2:bFvr>CHK</dppp2:bFvr>

<dppp2:customSName></dppp2:customSName>

<dppp2:hst>V42</dppp2:hst>

<dppp2:mPath i:nil="true" />

<dppp2:nNames xmlns:dppp4="http://********************************************************">

<dppp4:string>MyName</dppp4:string>

</dppp2:nNames>

<dppp2:nGuids xmlns:dppp4="http://*********************************************************">

<dppp4:string>My2Name</dppp4:string>

</dppp2:nGuids>

<dppp2:pArch>None</dppp2:pArch>

<dppp2:sType>ATUP</dppp2:sType>

<dppp2:uUM>false</dppp2:uUM>

<dppp2:vtName>5u_4{Counter}</dppp2:vtName>

<dppp2:vtType>mor</dppp2:vtType>

<dppp2:trIp xmlns:dppp4="http://**********************************************************">

<dppp4:mAd>7311160</dppp4:mAd>

<dppp4:mFam>InterNetwork</dppp4:mFam>

<dppp4:mHsh>0</dppp4:mHsh>

<dppp4:mNmb xmlns:dppp5="http://*********************************************************">

<dppp5:uShort>0</dppp5:uShort>

</dppp4:mNmb>

<dppp4:mScpId>0</dppp4:mScpId>

</dppp2:trIp>

<dppp2:tCrName>ctii_rl</dppp2:tCrName>

<dppp2:tEName>Nwa</dppp2:tEName>

<dppp2:tPName>AutoDefault</dppp2:tPName>

</dppp2:LVPrm>

</GoodData>

</uTemplateData>

"
You see that the above xml is more complex than the xml file which supported the radgridview.
So, I'm asking you as new developer of winforms to help me step by step in order to insert, update and delete records from the above xml.

If the radgridview is not intended for supporing such xml files, Please, guide me how to achieve the requirement using another control.

It is appreciated to send me a code with an explaination.

Regards,
Bader

GridView

answered on 16 Mar 2011

2 answers

94 views

Telerik Theme works after mouse hover

Hi,
I have encountered some problems:
First, I change my grid's theme to Telerik, at runtime Column Headers's theme still remains unchanged but other parts are effected.
and the user have to hover mouse over the header to see the theme's effect on grid. this happens only one time, at form load.

Second, In a comboobox column the cell doesn't show the correspond value of combobox.

Third, While I have handled DataError, CellValidating, RowValidation Events, why still NoNullAllowedException and DupplicatePrimaryKeyException throws by the application? this happen when I click somewhere on the Form or Grid (this really happens just test it).

Fourth, Do I have to write code to change combobox column' Right To Left property for each Grid of My App?

And more unsolved problems in the near future,
Special thanks to Telerik Team, for lots of time you pay to me.

GridView

answered on 16 Mar 2011