Xaml - WF4 - Display Workflow Image And Highlight An Activity?
May 8, 2010
I need to display current status of a document approval workflow task in asp.net web page with a specific activity highlighted.
I have seen the Visual workflow tracker example (in wf & wcf samples) but I have two issues,
I have to render workflow in asp.net not in a WPF app. I don't need to display current status with workflow running, all activities that need to be highlighted are the ones that require user input. e.g. "waiting for approval from department head" etc.
If I could just convert the workflow XAML to JPG after highlighting a specific activity by activity id "that created a bookmark and waiting for resumption the bookmark" it would do the work.
check the attached file for required workflow image to be rendered on asp.net page:
Workflow with current activity highlighted (that is waiting to be resumed)
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Mar 13, 2011
I am trying to understand this example. My issue, is can I save a .xoml/.xaml definition to the database the same way you save an xml file? Or do I have to convert this file to something else?
This is the .xoml that gets re-written with these values. The file that is generated as part of a wizard step.
[Code]....
This .xaml gets generated from this code.
try
{
// Save the workflow first, and capture the filePath of the workflow
this.workflowDesigner.XamlFile = "CustomOutlookWorkflow.xoml";
this.workflowDesigner.PerformSave();
this.xamlFile = this.workflowDesigner.XamlFile;
XmlDocument doc = new XmlDocument();
doc.Load(this.workflowDesigner.XamlFile);
XmlAttribute attrib = doc.CreateAttribute("x", "Class", "http://schemas.microsoft.com/winfx/2006/xaml");
attrib.Value = this.GetType().Namespace + ".CustomOutlookWorkflow";
doc.DocumentElement.Attributes.Append(attrib);
doc.Save(this.workflowDesigner.XamlFile);
compileWorkflowButton.Enabled = true;
MessageBox.Show(this, "Workflow generated successfully. Generated Workflow XAML file:
" + Path.Combine(Path.GetDirectoryName(this.GetType().Assembly.Location), xamlFile), this.Text, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch
{
generateWorkflowButton.Enabled = true;
}
public void PerformSave()
{
if (this.XamlFile.Length != 0)
{
this.SaveExistingWorkflow(this.XamlFile);
}
else
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "Workflow XAML files (*.xoml)|*.xoml|All files (*.*)|*.*";
saveFileDialog.FilterIndex = 1;
saveFileDialog.RestoreDirectory = true;
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
this.SaveExistingWorkflow(saveFileDialog.FileName);
this.Text = "Designer Hosting Sample -- [" + saveFileDialog.FileName + "]";
}
}
}
internal void SaveExistingWorkflow(string filePath)
{
if (this.surface != null && this.loader != null)
{
this.loader.XamlFile = filePath;
this.loader.PerformFlush(this.Host);
}
}
Ultimately a .dll is compiled and will be saved, but I would like to be able to save the xaml definition to the database. I hope this is easily converted to an enterprise solution but it is looking to be alot of work.
// Compile the workflow
String[] assemblyNames = { "ReadEmailActivity.dll" };
WorkflowCompiler compiler = new WorkflowCompiler();
WorkflowCompilerParameters parameters = new WorkflowCompilerParameters(assemblyNames);
parameters.LibraryPaths.Add(Path.GetDirectoryName(typeof(BaseMailbox).Assembly.Location));
parameters.OutputAssembly = "CustomOutlookWorkflow" + Guid.NewGuid().ToString() + ".dll";
results = compiler.Compile(parameters, this.xamlFile);
StringBuilder errors = new StringBuilder();
foreach (CompilerError compilerError in results.Errors)
{
errors.Append(compilerError.ToString() + '
');
}
if (errors.Length != 0)
{
MessageBox.Show(this, errors.ToString(), this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
compileWorkflowButton.Enabled = true;
}
else
{
MessageBox.Show(this, "Workflow compiled successfully. Compiled assembly:
" + results.CompiledAssembly.GetName(), this.Text, MessageBoxButtons.OK, MessageBoxIcon.Information);
startWorkflowButton.Enabled = true;
}
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