From c31b9fb57e37069145bca158a4312dbd6a5b6fd2 Mon Sep 17 00:00:00 2001
From: Luv Letter <luvletter2333@gmail.com>
Date: Tue, 11 Jun 2019 00:35:04 +0800
Subject: [PATCH] * Support Drag txt File

---
 Form1.Designer.cs |  5 +++--
 Form1.cs          | 30 ++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/Form1.Designer.cs b/Form1.Designer.cs
index f7d7ba6..8faa9d1 100644
--- a/Form1.Designer.cs
+++ b/Form1.Designer.cs
@@ -212,6 +212,7 @@ private void InitializeComponent()
             // 
             // lst_File
             // 
+            this.lst_File.AllowDrop = true;
             this.lst_File.FormattingEnabled = true;
             this.lst_File.ItemHeight = 15;
             this.lst_File.Location = new System.Drawing.Point(12, 136);
@@ -220,6 +221,8 @@ private void InitializeComponent()
             this.lst_File.Size = new System.Drawing.Size(252, 484);
             this.lst_File.TabIndex = 17;
             this.lst_File.SelectedIndexChanged += new System.EventHandler(this.lst_File_SelectedIndexChanged);
+            this.lst_File.DragDrop += new System.Windows.Forms.DragEventHandler(this.Lst_File_DragDrop);
+            this.lst_File.DragEnter += new System.Windows.Forms.DragEventHandler(this.Lst_File_DragEnter);
             // 
             // lst_SubTitle
             // 
@@ -322,8 +325,6 @@ private void InitializeComponent()
             this.Text = "Form1";
             this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
             this.Load += new System.EventHandler(this.Form1_Load);
-            //this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
-            // override protected method `ProcessCmdKey`
             this.ResumeLayout(false);
             this.PerformLayout();
 
diff --git a/Form1.cs b/Form1.cs
index 8649233..65b2e54 100644
--- a/Form1.cs
+++ b/Form1.cs
@@ -203,6 +203,7 @@ private void btn_DeleteFile_Click(object sender, EventArgs e)
 
         private void btn_import_Click(object sender, EventArgs e)
         {
+            Thread.CurrentThread.SetApartmentState(ApartmentState.STA);
             var ofd = new OpenFileDialog();
             //   ofd.Reset();
             ofd.Filter = "Txt File (*.txt)|*.txt|All Files|*.*";
@@ -225,6 +226,7 @@ private void btn_import_Click(object sender, EventArgs e)
                     }
                 }
             }
+            ofd.Dispose();
         }
 
         private void lst_File_SelectedIndexChanged(object sender, EventArgs e)
@@ -324,5 +326,33 @@ private void btn_Clear_Click(object sender = null, EventArgs e = null)
         }
         #endregion
 
+        private void Lst_File_DragEnter(object sender, DragEventArgs e)
+        {
+            if (e.Data.GetDataPresent(DataFormats.FileDrop))
+                e.Effect = DragDropEffects.All;
+            else
+                e.Effect = DragDropEffects.None;
+        }
+
+        private void Lst_File_DragDrop(object sender, DragEventArgs e)
+        {
+            string[] s = (string[])e.Data.GetData(DataFormats.FileDrop, false);
+
+            foreach (string filePath in s)
+            {
+                Console.WriteLine(filePath);
+                if (File.Exists(filePath))
+                {
+                    if (Path.GetExtension(filePath) != ".txt")
+                        continue;
+                    string fileName = Path.GetFileName(filePath);
+                    if (!lst_File.Items.Contains(fileName))
+                    {
+                        lst_File.Items.Add(fileName);
+                        ST_Files.Add(fileName, filePath);
+                    }
+                }
+            }
+        }
     }
 }