From eae9b422663bfeb09862c667844ecbcf2869cb57 Mon Sep 17 00:00:00 2001
From: Daniel Schick <schick@textbausteine.net>
Date: Mon, 6 Oct 2025 08:47:59 +0200
Subject: [PATCH] Fixed empty string/null comparison for waste disposal change
 detection

---
 ENI2/DetailViewControls/PortCallDetailControl.xaml.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ENI2/DetailViewControls/PortCallDetailControl.xaml.cs b/ENI2/DetailViewControls/PortCallDetailControl.xaml.cs
index aa19f35d..33cbce41 100644
--- a/ENI2/DetailViewControls/PortCallDetailControl.xaml.cs
+++ b/ENI2/DetailViewControls/PortCallDetailControl.xaml.cs
@@ -390,7 +390,7 @@ namespace ENI2.DetailViewControls
             this.textBox_AgentPostalCode.GetBindingExpression(TextBox.TextProperty).UpdateSource();
             this.textBox_AgentStreetAndNumber.Text = this._currentTemplate.AgentStreetAndNumber;
             this.textBox_AgentStreetAndNumber.GetBindingExpression(TextBox.TextProperty).UpdateSource();
-            if (this._currentTemplate.WasteDisposalServiceProviderName != this.textBox_WasteDisposalServiceProvider.Text)
+            if ((this._currentTemplate.WasteDisposalServiceProviderName ?? "") != this.textBox_WasteDisposalServiceProvider.Text)
             {
                 this.textBox_WasteDisposalServiceProvider.Text = this._currentTemplate.WasteDisposalServiceProviderName;
                 this.textBox_WasteDisposalServiceProvider.GetBindingExpression(TextBox.TextProperty).UpdateSource();