Mike the only mistake was the event.

Actually my task is to show different type of input controls in single column in each row depending on the value of data.

e.g. in bound dataset I have a field named "type" that defines the type of some info and depending on value of type I've to show DatePickers, Checkbox, combo, textbox in single column of grid in each row.

I hope you may have understood my requirement, I don't know is it possible by any solution or by some tweak.

Please suggest me some solution and event that I should use to do this.

Thanks alot for your assistance.

Hi Harshit, 

Just to be clear... you are using the Windorms Forms UltraGrid and UltraDropDown in an ASP.Net application? That doesn't make sense. As far as I know, it's not possible to use a Winforms control in an ASP.Net application. So I have to assume that you are just using the wrong terminology here. Or else you are using some kind of bridge or other technology I've never heard of it. If the latter, then that's not really something we can support.

There's nothing necessarily wrong with using the same field as both ValueMember and DisplayMember. Although, in such a case, you would not even need to set the DisplayMember. In fact, since you only have one column, both the ValueMember and DisplayMember will both default to the column. The only weird part about that would be that the grid column's DataType has to match the ValueMember field. I doubt that's relevant to the issue of the DropDown showing blanks, though. 

If your dropdown has rows, then presumably it is getting something from the data source. It must be getting the rows but for something reason, it is either unable to get the cell values or unable to draw them. At this point, I have to think it's something to do with the environment you are using - whatever that is. But frankly, I'm at a loss because I'm really confused about what you are doing and what environment you are using.  

I'm tempted to think you might be using UltraWebGrid, instead of UltraWinGrid - but you are posting in the WinForms forum and the code you posted sure looks like UltraWinGrid code. 

Hi Sir,

You're right. It's UltraWinGrid only. It's .net based windows application. I just checked, in the database, the datatype of this column is "VARCHAR2", although in the grid, I am using String. What corresponding data type for grid should be there for VARCHAR2?

Thanks,

Harshit

The DataType of the back end doesn't matter. It only matters what data type DotNet is using. 

Check the column.DataType of the grid column and compare that to the DataType of the column.DataType of the column in the dropdown. 

Hi Sir,

I have not modified either of the data types in my code so both of these should contain their default datatype. I know that my UltrawinGrid's default data type is string. How do I check it for column in the dropdown?

Regards,

Harshit

Hi Sir,

The values are coming up in dropdownlist now and when I am saving the record after selecting a certain value, it does get saved in database but doesn't stay in UI dropdown textbox. Also, This grid is getting loaded with certain values as well, but no value get selected by default in the dropdown textbox, although there is a value present in database.

Could you please help me out?

Thanks,
Harshit

Hi Sir,

Yes, this was the issue. Now the values have been populated. I know this was a sill one but thanks a lot.

Now, in this form, I have a UltraTextEditor, whose value is getting populated from a previous page. This value is present in the dropdown, that we have implemented. I need the default selected value of this dropdown to be the same value that is present there in this ultratexteditor. Is it possible?

Note: since my datatable(that contains the VALUELIST getting populated in the dropdown) has only one column, I don't have a n Index for the dropdownitems.

Hi Harshit, 

Well.. it's hard to tell from just a code snippet, but it looks like you said your data source has only one column and you are hiding that column. 

uddClini_bud_id.DisplayLayout.Bands[0].Columns["BUD_ID"].Hidden = true;

So that would certainly explain all of the behavior you are describing. You are hiding the only column in the dropdown, so there's nothing to display. 

This is my current code in View.cs

BindingContext bc = new System.Windows.Forms.BindingContext();

                uddClini_bud_id.BindingContext = bc;

                //e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].DefaultCellValue.Equals(uteBindBudId.Text);

                uddClini_bud_id.DataSource = Lookup.ClinicalBudIdMapping.ClinicalBudIdMappingDt;

                uddClini_bud_id.ValueMember = "BUD_ID";

                uddClini_bud_id.DisplayMember = "BUD_ID";

                uddClini_bud_id.DropDownWidth = 250;

                //uddClini_bud_id.DisplayMember.StartsWith("BUD_ID", true, null);

                uddClini_bud_id.DisplayLayout.Bands[0].Columns["BUD_ID"].Hidden = true;

                uddClini_bud_id.DisplayLayout.Bands[0].Columns["BUD_ID"].Width = e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].Width;

                e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].ValueList = uddClini_bud_id;

                e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].ValueList.ShouldDisplayText.Equals(true);

                //e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].DataType.ToString();

                //e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].Style = Infragistics.Win.UltraWinGrid.ColumnStyle.DropDownList;

                e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].FilterEvaluationTrigger = FilterEvaluationTrigger.OnEnterKeyOrLeaveCell;

                e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].FilterOperandStyle = FilterOperandStyle.DropDownList;

                e.Layout.Bands[1].Columns["CLIN_BUDGET_ID"].FilterOperandStyle = FilterOperandStyle.Edit;

And this is there in the designer.cs of this form. Some of it (the last 5 lines) got created by itself  and the rest of it has been added by me.

            this.uddClini_bud_id.DisplayLayout.Appearance = appearance121;

            //this.uddClini_bud_id.DisplayLayout.BandsSerializer.Add(ultraGridBand17);

            this.uddClini_bud_id.DisplayLayout.BorderStyle = Infragistics.Win.UIElementBorderStyle.Solid;

            this.uddClini_bud_id.DisplayLayout.CaptionVisible = Infragistics.Win.DefaultableBoolean.False;

            this.uddClini_bud_id.DisplayLayout.GroupByBox.Appearance = appearance122;

            this.uddClini_bud_id.DisplayLayout.GroupByBox.BandLabelAppearance = appearance123;

            this.uddClini_bud_id.DisplayLayout.GroupByBox.BorderStyle = Infragistics.Win.UIElementBorderStyle.Solid;

            this.uddClini_bud_id.DisplayLayout.GroupByBox.PromptAppearance = appearance124;

            this.uddClini_bud_id.DisplayLayout.MaxColScrollRegions = 1;

            this.uddClini_bud_id.DisplayLayout.MaxRowScrollRegions = 1;

            this.uddClini_bud_id.DisplayLayout.Override.ActiveCellAppearance = appearance125;

            this.uddClini_bud_id.DisplayLayout.Override.ActiveRowAppearance = appearance126;

            this.uddClini_bud_id.DisplayLayout.Override.BorderStyleCell = Infragistics.Win.UIElementBorderStyle.Dotted;

            this.uddClini_bud_id.DisplayLayout.Override.BorderStyleRow = Infragistics.Win.UIElementBorderStyle.Dotted;

            this.uddClini_bud_id.DisplayLayout.Override.CardAreaAppearance = appearance127;

            this.uddClini_bud_id.DisplayLayout.Override.CellAppearance = appearance126;

            //this.ucRecipient.DisplayLayout.Override.CellClickAction = Infragistics.Win.UltraWinGrid.CellClickAction.EditAndSelectText;

            this.uddClini_bud_id.DisplayLayout.Override.CellPadding = 0;

            this.uddClini_bud_id.DisplayLayout.Override.GroupByRowAppearance = appearance129;

            this.uddClini_bud_id.DisplayLayout.Override.HeaderAppearance = appearance130;

            this.uddClini_bud_id.DisplayLayout.Override.HeaderClickAction = Infragistics.Win.UltraWinGrid.HeaderClickAction.SortMulti;

            this.uddClini_bud_id.DisplayLayout.Override.HeaderStyle = Infragistics.Win.HeaderStyle.WindowsXPCommand;

            this.uddClini_bud_id.DisplayLayout.Override.RowAppearance = appearance131;

            this.uddClini_bud_id.DisplayLayout.Override.RowSelectors = Infragistics.Win.DefaultableBoolean.False;

            this.uddClini_bud_id.DisplayLayout.Override.TemplateAddRowAppearance = appearance132;

            this.uddClini_bud_id.DisplayLayout.ScrollBounds = Infragistics.Win.UltraWinGrid.ScrollBounds.ScrollToFill;

            this.uddClini_bud_id.DisplayLayout.ScrollStyle = Infragistics.Win.UltraWinGrid.ScrollStyle.Immediate;

            this.uddClini_bud_id.DisplayLayout.ViewStyleBand = Infragistics.Win.UltraWinGrid.ViewStyleBand.OutlookGroupBy;

            //

            this.uddClini_bud_id.Location = new System.Drawing.Point(3, 529);

            this.uddClini_bud_id.Name = "uddClini_bud_id";

            this.uddClini_bud_id.Size = new System.Drawing.Size(94, 14);

            this.uddClini_bud_id.TabIndex = 101;

            this.uddClini_bud_id.Visible = false;

I think the image has been attached now.

Also, I was talking about FilterOperandStyle.

Though, you got it right sir, this is exactly the issue I have. However, I have checked for appearance and creationFilter/draw filter. These have not been applied in my code. I don't know where to find StyleManager.Load. I understand that this is something done inside my code only, something is sort of setting the visibility of these values to false. but I am unable to find that thing.

Do you think I should start over by using UltracomboEditor? or anything else?