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sql2/Forms/DataForm.Designer.cs

@@ -81,6 +81,7 @@
             this.textBox1.Name = "textBox1";
             this.textBox1.Size = new System.Drawing.Size(366, 26);
             this.textBox1.TabIndex = 2;
+            this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
             // 
             // button1
             // 
@@ -91,6 +92,7 @@
             this.button1.TabIndex = 3;
             this.button1.Text = "Поиск";
             this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.button1_Click);
             // 
             // label2
             // 
@@ -141,6 +143,7 @@
             this.toolStripButton1.Name = "toolStripButton1";
             this.toolStripButton1.Size = new System.Drawing.Size(121, 29);
             this.toolStripButton1.Text = "Обновить";
+            this.toolStripButton1.Click += new System.EventHandler(this.toolStripButton1_Click);
             // 
             // toolStripSeparator2
             // 

sql2/Forms/DataForm.cs

@@ -14,6 +14,7 @@ namespace PaymentLogs
 {
     public partial class DataForm : Form
     {
+
         public DataForm()
         {
             InitializeComponent();
@@ -59,7 +60,7 @@ namespace PaymentLogs
             {
                 try
                 {
-                    if(row.Cells.Count > 1)
+                    if(row.Cells.Count > 1 && row.Cells["id"].Value != null)
                     {
                         Payment payment = new Payment
                         {
@@ -85,5 +86,54 @@ namespace PaymentLogs
             }
             Program.PaymentRepository.Save();
         }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            string FCsText = textBox1.Text;
+            string CourseText = textBox2.Text;
+            List<List<string>> filtredList = new List<List<string>>();
+            foreach (DataGridViewRow row in dataGridView1.Rows)
+            {
+                try
+                {
+                    if(row.Cells["fcs"].Value == null)
+                    {
+                        continue;
+                    }
+                    string FCs = row.Cells["fcs"].Value.ToString();
+                    string course = row.Cells["course"].Value.ToString();
+                    if (((FCs.Equals(FCsText)) && (course.Equals(CourseText))) ) 
+                    {
+                        List<string> list =  new List<string> 
+                        { row.Cells["id"].Value.ToString(), row.Cells["fcs"].Value.ToString(), 
+                            row.Cells["course"].Value.ToString(), row.Cells["course_price"].Value.ToString(),
+                            row.Cells["paid"].Value.ToString(), row.Cells["debt"].Value.ToString() };
+                        
+                        filtredList.Add(list);
+                    }
+                } 
+                catch(Exception ignored)
+                {
+
+                }
+            }
+            dataGridView1.Rows.Clear();
+            foreach (List<String> args in filtredList)
+            {
+                dataGridView1.Rows.Add(args[0], args[1], args[2], args[3], args[4], args[5]);
+            }
+            
+        }
+
+        private void textBox1_TextChanged(object sender, EventArgs e)
+        {
+
+        }
+
+        private void toolStripButton1_Click(object sender, EventArgs e)
+        {
+            dataGridView1.Rows.Clear();
+            Form1_Load(null, null);
+        }
     }
 }