add ability to set default column sizes #49

also upgrade to .net 4.7.2

Author: mukunku

src/ParquetFileViewer/App.config

@@ -1,21 +1,21 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2"/>
     </startup>
   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
-        <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+        <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="IronSnappy" publicKeyToken="b1d4b1dc83bdcf31" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.3.0.0" newVersion="1.3.0.0" />
+        <assemblyIdentity name="IronSnappy" publicKeyToken="b1d4b1dc83bdcf31" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-1.3.0.0" newVersion="1.3.0.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0"/>
       </dependentAssembly>
     </assemblyBinding>
   </runtime>

src/ParquetFileViewer/AppSettings.cs

@@ -1,20 +1,24 @@
 using Microsoft.Win32;
 using System;
+using System.Windows.Forms;
 
 namespace ParquetFileViewer
 {
     public static class AppSettings
     {
+        private const string RegistrySubKey = "ParquetViewer";
         private const string UseISODateFormatKey = "UseISODateFormat";
         private const string AlwaysSelectAllFieldsKey = "AlwaysSelectAllFields";
         private const string ParquetReadingEngineKey = "ParquetReadingEngine";
+        private const string AutoSizeColumnsModeKey = "AutoSizeColumnsMode";
+
         public static bool UseISODateFormat
         {
             get
             {
                 try
                 {
-                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey("ParquetViewer"))
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
                     {
                         bool value = false;
                         bool.TryParse(registryKey.GetValue(UseISODateFormatKey)?.ToString(), out value);
@@ -30,7 +34,7 @@ public static bool UseISODateFormat
             {
                 try
                 {
-                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey("ParquetViewer"))
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
                     {
                         registryKey.SetValue(UseISODateFormatKey, value.ToString());
                     }
@@ -45,7 +49,7 @@ public static bool AlwaysSelectAllFields
             {
                 try
                 {
-                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey("ParquetViewer"))
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
                     {
                         bool value = false;
                         bool.TryParse(registryKey.GetValue(AlwaysSelectAllFieldsKey)?.ToString(), out value);
@@ -61,7 +65,7 @@ public static bool AlwaysSelectAllFields
             {
                 try
                 {
-                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey("ParquetViewer"))
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
                     {
                         registryKey.SetValue(AlwaysSelectAllFieldsKey, value.ToString());
                     }
@@ -76,7 +80,7 @@ public static ParquetEngine ReadingEngine
             {
                 try
                 {
-                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey("ParquetViewer"))
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
                     {
                         ParquetEngine value = default;
                         if (!Enum.TryParse<ParquetEngine>(registryKey.GetValue(ParquetReadingEngineKey)?.ToString(), out value))
@@ -94,13 +98,46 @@ public static ParquetEngine ReadingEngine
             {
                 try
                 {
-                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey("ParquetViewer"))
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
                     {
                         registryKey.SetValue(ParquetReadingEngineKey, value.ToString());
                     }
                 }
                 catch { }
             }
         }
+
+        public static DataGridViewAutoSizeColumnsMode AutoSizeColumnsMode
+        {
+            get
+            {
+                try
+                {
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
+                    {
+                        int? value = registryKey.GetValue(AutoSizeColumnsModeKey) as int?;
+                        if (value != null && Enum.IsDefined(typeof(DataGridViewAutoSizeColumnsMode), value))
+                            return (DataGridViewAutoSizeColumnsMode)value;
+                        else
+                            return DataGridViewAutoSizeColumnsMode.Fill;
+                    }
+                }
+                catch
+                {
+                    return DataGridViewAutoSizeColumnsMode.Fill;
+                }
+            }
+            set
+            {
+                try
+                {
+                    using (RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(RegistrySubKey))
+                    {
+                        registryKey.SetValue(AutoSizeColumnsModeKey, (int)value);
+                    }
+                }
+                catch { }
+            }
+        }
     }
 }