sec fixes

Matrices.cs

@@ -79,8 +79,32 @@ namespace Lab
             {
                 for (int col = 0; col < cols; col++)
                 {
-                    double num = (double)dt.Rows[row][col];
-                    num = double.IsInfinity(num) || double.IsNaN(num) ? 0 : num;
+                    object cell = dt.Rows[row][col];
+
+                    double num = 0;
+
+                    if (cell is null || cell == DBNull.Value)
+                    {
+                        num = 0;
+                    }
+                    else if (cell is double d)
+                    {
+                        num = d;
+                    }
+                    else if (cell is int i)
+                    {
+                        num = i;
+                    }
+                    else
+                    {
+                        if (!Parsers.TryParseDouble(cell.ToString(), out num)) num = 0;
+                    }
+
+                    if (double.IsNaN(num) || double.IsInfinity(num)) num = 0;
+
+                    if (num > int.MaxValue) num = int.MaxValue;
+                    if (num < int.MinValue) num = int.MinValue;
+
                     array[row, col] = Convert.ToInt32(num);
                 }
             }