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Query with radio button or check box

TanyaOwens

Hello,
I would like to set up a query that is created from the user checking a check box or clicking a radio button. For example, the user would check a box next to wheelchair accessible and the results would return services that are wheelchair accessible into a datagrid. Most of the codes I see are where the user inputs text to create the query. Does anyone know of an example code for query by check box or radio button?

Thanks!

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Accepted answers

JoeHershman

Assuming you are always having the button content be the name of the state you can avoid a long if block with;

        private void RadioButton_Click(object sender, RoutedEventArgs e)         {             // Query task initialization.             QueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/" +               "Demographics/ESRI_Census_USA/MapServer/5");             queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;             queryTask.Failed += QueryTask_Failed;               // Query task parameters. Return geometry, state, and population density.             Query query = new Query();             query.ReturnGeometry = true;             query.OutFields.AddRange(new string[] { "STATE_NAME"});                          //The Clicked Radio button is always the one selected..             RadioButton button = sender as RadioButton;             if ( button == null ) return;               query.Where = "STATE_NAME = '" + button.Content + "'";               queryTask.ExecuteAsync(query);         }

All comments

DominiqueBroux

I have no ready to use sample but try to add a click event handler to your radio buttons, and, in that event handlers, change the where clause of your feature layer and update the feature layer.

TanyaOwens

Using the query concept code http://help.arcgis.com/en/webapi/silverlight/help/index.html#/Query_task/01660000001t000000/, I am a little lost about what to do with the code at the "query.Where = QueryTextBox.Text;"

I have added the following xaml:

        <!-- QUERY TASK INTERFACE -->
        <StackPanel HorizontalAlignment="Left" Margin="10">
            <Grid>
                <Rectangle Fill="Orange" 
                           Stroke="Gray"  
                           RadiusX="10" 
                           RadiusY="10" />
                
                <StackPanel Orientation="Vertical" Grid.Column="1" Grid.Row="3" Grid.ColumnSpan="3">
                    <TextBlock x:Name="QueryData" 
                                   Text="Do you have any special needs for your trip?" 
                                   Foreground="White" 
                                   FontSize="20" FontWeight ="ExtraBold"
                                   Grid.Row="0"                      
                                   Margin="15,5,15,1" 
                                   HorizontalAlignment="Center" >
                    </TextBlock>

                    <RadioButton 
                        x:Name="AZ"
                        Click="RadioButton_Click"
                        GroupName="STATE_NAME"                             
                        Foreground="White"  
                        Content="Arizona">
                    </RadioButton>

                    <RadioButton
                        x:Name="NM"
                        Click="RadioButton_Click"
                        GroupName="STATE_NAME"                             
                        Foreground="White" 
                        Content="New Mexico" >
                    </RadioButton>

                    <RadioButton
                        x:Name="NY"
                        Click="RadioButton_Click"
                        GroupName="STATE_NAME"                             
                        Foreground="White" 
                        Content="New York" >
                    </RadioButton>
                </StackPanel>
            </Grid>
        </StackPanel>

And this is what I have so far for the c# code:

        private void RadioButton_Click(object sender, RoutedEventArgs e)
        {
            // Query task initialization.
            QueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/" +
              "Demographics/ESRI_Census_USA/MapServer/5");
            queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
            queryTask.Failed += QueryTask_Failed;

            // Query task parameters. Return geometry, state, and population density.
            Query query = new Query();
            query.ReturnGeometry = true;
            query.OutFields.AddRange(new string[] { "STATE_NAME"});

            // Use textbox text as query condition. 
            //query.Where = QueryTextBox.Text; 
            query.Where = 
                if (AZ.IsChecked == true)

            else if (NM.IsChecked == true)

            else if (NY.IsChecked == true)

            queryTask.ExecuteAsync(query);
        }

chuckyboy81070

        <!-- QUERY TASK INTERFACE -->
        <StackPanel HorizontalAlignment="Left" Margin="10">
            <Grid>
                <Rectangle Fill="Orange" 
                           Stroke="Gray"  
                           RadiusX="10" 
                           RadiusY="10" />
                
                <StackPanel Orientation="Vertical" Grid.Column="1" Grid.Row="3" Grid.ColumnSpan="3">
                    <TextBlock x:Name="QueryData" 
                                   Text="Do you have any special needs for your trip?" 
                                   Foreground="White" 
                                   FontSize="20" FontWeight ="ExtraBold"
                                   Grid.Row="0"                      
                                   Margin="15,5,15,1" 
                                   HorizontalAlignment="Center" >
                    </TextBlock>

                    <RadioButton 
                        x:Name="AZ"
                        Click="RadioButton_Click"
                        GroupName="STATE_NAME"                             
                        Foreground="White"  
                        Content="Arizona">
                    </RadioButton>

                    <RadioButton
                        x:Name="NM"
                        Click="RadioButton_Click"
                        GroupName="STATE_NAME"                             
                        Foreground="White" 
                        Content="New Mexico" >
                    </RadioButton>

                    <RadioButton
                        x:Name="NY"
                        Click="RadioButton_Click"
                        GroupName="STATE_NAME"                             
                        Foreground="White" 
                        Content="New York" >
                    </RadioButton>
                </StackPanel>
            </Grid>
        </StackPanel>

And this is what I have so far for the c# code:

        private void RadioButton_Click(object sender, RoutedEventArgs e)
        {
            // Query task initialization.
            QueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/" +
              "Demographics/ESRI_Census_USA/MapServer/5");
            queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
            queryTask.Failed += QueryTask_Failed;

            // Query task parameters. Return geometry, state, and population density.
            Query query = new Query();
            query.ReturnGeometry = true;
            query.OutFields.AddRange(new string[] { "STATE_NAME"});

            // Use textbox text as query condition. 
            //query.Where = QueryTextBox.Text; 
            query.Where = 
                if (AZ.IsChecked == true)

            else if (NM.IsChecked == true)

            else if (NY.IsChecked == true)

            queryTask.ExecuteAsync(query);
        }

Try

        private void RadioButton_Click(object sender, RoutedEventArgs e)
        {
            // Query task initialization.
            QueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/" +
              "Demographics/ESRI_Census_USA/MapServer/5");
            queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
            queryTask.Failed += QueryTask_Failed;

            // Query task parameters. Return geometry, state, and population density.
            Query query = new Query();
            query.ReturnGeometry = true;
            query.OutFields.AddRange(new string[] { "STATE_NAME"});

            // Use textbox text as query condition. 
            //query.Where = QueryTextBox.Text; 
                if (AZ.IsChecked == true)
                   query.Where = "STATE_NAME = 'Arizona'";
            else if (NM.IsChecked == true)
                   query.Where = "STATE_NAME = 'New Mexico'";
            else if (NY.IsChecked == true)
                   query.Where = "STATE_NAME = 'New York'";
            queryTask.ExecuteAsync(query);
        }

JoeHershman

Assuming you are always having the button content be the name of the state you can avoid a long if block with;

        private void RadioButton_Click(object sender, RoutedEventArgs e)         {             // Query task initialization.             QueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/" +               "Demographics/ESRI_Census_USA/MapServer/5");             queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;             queryTask.Failed += QueryTask_Failed;               // Query task parameters. Return geometry, state, and population density.             Query query = new Query();             query.ReturnGeometry = true;             query.OutFields.AddRange(new string[] { "STATE_NAME"});                          //The Clicked Radio button is always the one selected..             RadioButton button = sender as RadioButton;             if ( button == null ) return;               query.Where = "STATE_NAME = '" + button.Content + "'";               queryTask.ExecuteAsync(query);         }

TanyaOwens

Thanks for the help everyone. The code that Lance provided works for me but I was really interested in the code provided by Joe. This would be nice but unfortunately I can't seem to get it to work. It doesn't return any errors - it just doesn't do anything with I click the buttons during debugging. Any thoughts?

JoeHershman

Thanks for the help everyone. The code that Lance provided works for me but I was really interested in the code provided by Joe. This would be nice but unfortunately I can't seem to get it to work. It doesn't return any errors - it just doesn't do anything with I click the buttons during debugging. Any thoughts?

Not clear on doesn't do anything.

I assume it is going into the method and gets to the line below

    if ( button == null ) return;

Check what the Query:Where is with a Debug statement or in the watch window to confirm is same as before.

I run the same code with the buttons copied out of your post and it all worked

Good luck
-Joe

TanyaOwens

Thanks Joe. I finally got it to work. I must have been having a bad day and I had accidentally commented the "queryTask.ExecuteAsync(query);". Once I went back a looked at it today, I saw the error and it works perfectly.

TanyaOwens

Follow up question: I would like the radiobutton click to query one or more at a time. For example, I would like to query if a service has Walker and Oxygen Tank accommodations or just query "Service Animal" only or "Walker" only. I figured out I could allow for multiple radio buttons to be clicked by having individual GroupName but I am not sure what to do with the code behind. Currently my code looks like this:

            if (OxygenTank.IsChecked == true)
                query.Where = "OxygenTank = 'Oxygen Tank'";

            else if (ServiceAnimal.IsChecked == true)
                query.Where = "ServiceAnimal = 'Service Animal'";

            else if (Walker.IsChecked == true)
                query.Where = "Walker = 'Walker'";

Any suggestions would be greatly appreciated.

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