diff --git a/.vs/etcdii/FileContentIndex/4d1b74e1-ddaa-498c-b05e-18297458ade5.vsidx b/.vs/etcdii/FileContentIndex/4d1b74e1-ddaa-498c-b05e-18297458ade5.vsidx
deleted file mode 100644
index 4867d44..0000000
Binary files a/.vs/etcdii/FileContentIndex/4d1b74e1-ddaa-498c-b05e-18297458ade5.vsidx and /dev/null differ
diff --git a/.vs/etcdii/FileContentIndex/a792d72b-3ec3-4c85-acf0-e5c9b2741962.vsidx b/.vs/etcdii/FileContentIndex/5546451f-5dc0-485b-b4ea-7bf7c54594be.vsidx
similarity index 99%
rename from .vs/etcdii/FileContentIndex/a792d72b-3ec3-4c85-acf0-e5c9b2741962.vsidx
rename to .vs/etcdii/FileContentIndex/5546451f-5dc0-485b-b4ea-7bf7c54594be.vsidx
index 8eeabec..e0649ba 100644
Binary files a/.vs/etcdii/FileContentIndex/a792d72b-3ec3-4c85-acf0-e5c9b2741962.vsidx and b/.vs/etcdii/FileContentIndex/5546451f-5dc0-485b-b4ea-7bf7c54594be.vsidx differ
diff --git a/.vs/etcdii/FileContentIndex/f4bd23d8-71e4-441f-b542-fd75c49dc0dd.vsidx b/.vs/etcdii/FileContentIndex/f4bd23d8-71e4-441f-b542-fd75c49dc0dd.vsidx
new file mode 100644
index 0000000..66ba789
Binary files /dev/null and b/.vs/etcdii/FileContentIndex/f4bd23d8-71e4-441f-b542-fd75c49dc0dd.vsidx differ
diff --git a/.vs/etcdii/v17/.suo b/.vs/etcdii/v17/.suo
index eefd707..2b0bcb4 100644
Binary files a/.vs/etcdii/v17/.suo and b/.vs/etcdii/v17/.suo differ
diff --git a/Form1.Designer.cs b/Form1.Designer.cs
index 10283d4..f59658e 100644
--- a/Form1.Designer.cs
+++ b/Form1.Designer.cs
@@ -216,6 +216,7 @@ private void InitializeComponent()
             this.textBox6.Name = "textBox6";
             this.textBox6.Size = new System.Drawing.Size(86, 21);
             this.textBox6.TabIndex = 11;
+            this.textBox6.TextChanged += new System.EventHandler(this.textBox6_TextChanged);
             // 
             // button3
             // 
@@ -225,6 +226,7 @@ private void InitializeComponent()
             this.button3.TabIndex = 12;
             this.button3.Text = "Filter";
             this.button3.UseVisualStyleBackColor = true;
+            this.button3.Click += new System.EventHandler(this.button3_Click);
             // 
             // button4
             // 
diff --git a/Form1.cs b/Form1.cs
index f23d2c1..46ab36f 100644
--- a/Form1.cs
+++ b/Form1.cs
@@ -195,5 +195,62 @@ private void set_All_item()
                 }
             }
         }
+
+        private void button3_Click(object sender, EventArgs e)
+        {
+            var filterStr = textBox6.Text.Trim();
+            var endStr = "";
+
+            if (httpclient.GLOBAL_CONNECT_STATUS == true)
+            {
+                if (filterStr != "")
+                {
+                    try
+                    {
+                        listBox1.Items.Clear();
+                        var filterArr = filterStr.ToCharArray();
+                        for (int i = 0; i < filterArr.Length; i++)
+                        {
+                            if (i == filterArr.Length - 1)
+                            {
+                                var n = Encoding.ASCII.GetBytes(filterArr[i].ToString());
+                                endStr += Convert.ToChar(n[0] + 1);
+                            }
+                            else
+                            {
+                                endStr += filterArr[i];
+                            }
+                        }
+                        var filterKey = "{\"key\": \"" + util.base64Encode(filterStr) + "\",\"range_end\": \"" + util.base64Encode(endStr) + "\"}";
+                        var filterList = httpclient.PostEtcdValue(Operate.AllKeys, filterKey);
+                        EtcdKvRange etcdKvRange = JsonSerializer.Deserialize<EtcdKvRange>(filterList);
+                        if (etcdKvRange.kvs!=null&& etcdKvRange.kvs.Length > 0)
+                        {
+                            foreach (var item in etcdKvRange.kvs)
+                            {
+                                listBox1.Items.Add(util.base64Decode(item.key));
+                            }
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        Console.WriteLine(ex.Message);
+                    }
+                }
+                else
+                {
+                    set_All_item();
+                }
+            }
+            else
+            {
+                MessageBox.Show("No Connect");
+            }
+        }
+
+        private void textBox6_TextChanged(object sender, EventArgs e)
+        {
+
+        }
     }
 }
diff --git a/bin/Debug/etcdii.exe b/bin/Debug/etcdii.exe
index 997729e..ff4ca4e 100644
Binary files a/bin/Debug/etcdii.exe and b/bin/Debug/etcdii.exe differ
diff --git a/bin/Debug/etcdii.pdb b/bin/Debug/etcdii.pdb
index a75f85c..77e97af 100644
Binary files a/bin/Debug/etcdii.pdb and b/bin/Debug/etcdii.pdb differ
diff --git a/obj/Debug/etcdii.csproj.GenerateResource.cache b/obj/Debug/etcdii.csproj.GenerateResource.cache
index 70d6bc4..578e33c 100644
Binary files a/obj/Debug/etcdii.csproj.GenerateResource.cache and b/obj/Debug/etcdii.csproj.GenerateResource.cache differ
diff --git a/obj/Debug/etcdii.exe b/obj/Debug/etcdii.exe
index 997729e..ff4ca4e 100644
Binary files a/obj/Debug/etcdii.exe and b/obj/Debug/etcdii.exe differ
diff --git a/obj/Debug/etcdii.pdb b/obj/Debug/etcdii.pdb
index a75f85c..77e97af 100644
Binary files a/obj/Debug/etcdii.pdb and b/obj/Debug/etcdii.pdb differ