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POMultiple controls in GridView Cell for each row
 

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  1. POMultiple controls in GridView Cell for each row
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    <p>I am working on an application, in which there is a requirement to have a ComboBox and a Text Box in a single Cell of Grid.</p> <p>I have written this piece of code of this:</p> <pre><code>&lt;telerikGrid:GridViewDataColumn HeaderCellStyle="{StaticResource HeaderStyle}" Width="Auto" Header="Values Format"&gt; &lt;telerikGrid:GridViewColumn.CellStyle &gt; &lt;Style TargetType="telerikGridView:GridViewCell"&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="telerikGridView:GridViewCell"&gt; &lt;Border &gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;telerik:RadComboBox x:Name="cbxFormat" Margin="5,1,5,1" Width="50" ItemsSource="{StaticResource FormatList}" SelectedItem="{Binding Format, Mode=TwoWay}" SelectionChanged="cbxFormat_SelectionChanged" DropDownClosed="cbxFormat_DropDownClosed" LostFocus="cbxFormat_LostFocus"/&gt; &lt;TextBox x:Name="txtFormatValue" Style="{StaticResource TextBox}" Margin="0,1,5,1" Width="50" LostFocus="txtFormatValue_LostFocus" IsEnabled="False" ToolTipService.ToolTip="Bit needs a number | Mat two numbers to set the serie boundaries" Text="{Binding FormatValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" /&gt; &lt;/StackPanel&gt; &lt;/Border&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; &lt;/telerikGrid:GridViewColumn.CellStyle&gt; </code></pre> <p></p> <p>With the above code i was able to have Combo box and Text Box in the same cell.</p> <p>Now there can be multiple rows in the Grid, so for each row i will be having the above controls in a single cell.</p> <p>Whenever value is changed in the combo box, a coressponding value is set in the text box from code behind.</p> <p>Here is the code for that:</p> <pre><code>private void cbxFormat_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e) { if (e.RemovedItems.Count != 0) { RadComboBox cbxFormatResult = (RadComboBox)sender; TextBox txtFormatValueResult = ((StackPanel)((RadComboBox)sender).Parent).ChildrenOfType&lt;TextBox&gt;().First(); if (cbxFormatResult.SelectedItem != null) { dgParams.BeginEdit(); switch ((IDA.Resources_WS.ValueFormat)cbxFormatResult.SelectedItem) { case IDA.Resources_WS.ValueFormat.Bit: txtFormatValueResult.IsEnabled = true; txtFormatValueResult.ValidateBitFormat(); break; case IDA.Resources_WS.ValueFormat.Mat: txtFormatValueResult.IsEnabled = true; txtFormatValueResult.ValidateMatrixFormat(); break; default: txtFormatValueResult.IsEnabled = false; Parameter param = txtFormatValueResult.DataContext as Parameter; if (param != null) txtFormatValueResult.Text = param.FormatValue = string.Empty; else txtFormatValueResult.Text = string.Empty; break; } dgParams.CommitEdit(); } } } private void txtFormatValue_LostFocus(object sender, RoutedEventArgs e) { //Caller TextBox TextBox txtFormatValueResult = (TextBox)sender; //Content Parameter param = txtFormatValueResult.DataContext as Parameter; //linked controlers StackPanel stkParent = (StackPanel)txtFormatValueResult.Parent; RadComboBox cbxFormatValueResult = (RadComboBox)stkParent.Children[0]; if (!cbxFormatValueResult.IsDropDownOpen &amp;&amp; param != null) { //Bit if (param.Format.Equals(IDA.Resources_WS.ValueFormat.Bit) &amp;&amp; txtFormatValueResult.ValidateBitFormat()) { param.FormatValue = txtFormatValueResult.Text; } //Matrice if (param.Format.Equals(IDA.Resources_WS.ValueFormat.Mat) &amp;&amp; txtFormatValueResult.ValidateMatrixFormat()) { param.FormatValue = txtFormatValueResult.Text; } } } public static bool ValidateBitFormat(this TextBox txtIn) { IDA.Resources_WS.Parameter param = txtIn.DataContext as IDA.Resources_WS.Parameter; if (param != null) { int formatedInt; if (int.TryParse(txtIn.Text, out formatedInt) &amp;&amp; formatedInt &gt;= 1) { param.FormatValue = txtIn.Text; return true; } else { param.FormatValue = FormatList.DefaultBit; txtIn.Focus(); txtIn.SelectAll(); return false; } } return false; } public static bool ValidateBitFormat(this TextBox txtIn) { IDA.Resources_WS.Parameter param = txtIn.DataContext as IDA.Resources_WS.Parameter; if (param != null) { int formatedInt; if (int.TryParse(txtIn.Text, out formatedInt) &amp;&amp; formatedInt &gt;= 1) { param.FormatValue = txtIn.Text; return true; } else { param.FormatValue = FormatList.DefaultBit; txtIn.Focus(); txtIn.SelectAll(); return false; } } return false; } public static bool ValidateMatrixFormat(this TextBox txtIn) { IDA.Resources_WS.Parameter param = txtIn.DataContext as IDA.Resources_WS.Parameter; if (param != null) { int[] formatedInt = new int[2]; var splittedText = txtIn.Text.Split(':'); //is textBox contains ':' if (txtIn.Text.Contains(":") &amp;&amp; int.TryParse(splittedText[0], out formatedInt[0]) &amp;&amp; int.TryParse(splittedText[1], out formatedInt[1])) { param.FormatValue = txtIn.Text; return true; } else { param.FormatValue = FormatList.DefaultMat; txtIn.Focus(); txtIn.SelectAll(); return false; } } return false; } </code></pre> <p>Now, the problems that i am facing are:</p> <blockquote> <p>1) SelectionChanged event is fired for all the combo boxes even though i change a specific combo box only.</p> <p>2) Text box next to combo box is not getting updated.</p> <p>3) If i remove the code : <strong>if (e.RemovedItems.Count != 0){ }</strong> then, the corresponding text box is selected and also displays the default value, but i am not able to update the value, because some how the selectionChanged event is fired.</p> <p>4) SelectedItem for the combo box is sometimes null, even though a default value is already selected.</p> </blockquote> <p>Can anyone provide a solution for the above problems?</p> <p>Also, if somebody thinks of some different approach with which the same functionality can be achieved</p>
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