1 private void OperateDataTable() 2 { 3 DataTable dataTableA = new DataTable("Table A"); 4 DataColumn dataColumn; 5 DataRow dataRow; 6 7 dataColumn = new DataColumn(); 8 dataColumn.ColumnName = "ID"; 9 dataColumn.DataType = typeof(int); //Type.GetType("System.Int32");10 dataTableA.Columns.Add(dataColumn);11 12 dataColumn = new DataColumn();13 dataColumn.ColumnName = "Name";14 dataColumn.DataType = typeof(string);15 dataTableA.Columns.Add(dataColumn);16 17 for (int i = 0; i < 10; i++)18 {19 dataRow = dataTableA.NewRow();20 21 dataRow["ID"] = i;22 dataRow["Name"] = $"{i}_Name";23 24 dataTableA.Rows.Add(dataRow);25 }26 27 DataTable dataTableB = new DataTable("Table B");28 29 dataColumn = new DataColumn();30 dataColumn.ColumnName = "ID";31 dataColumn.DataType = typeof(int); //Type.GetType("System.Int32");32 dataTableB.Columns.Add(dataColumn);33 34 dataColumn = new DataColumn();35 dataColumn.ColumnName = "Name";36 dataColumn.DataType = typeof(string);37 dataTableB.Columns.Add(dataColumn);38 39 for (int i = 10; i < 20; i++)40 {41 dataRow = dataTableB.NewRow();42 43 dataRow["ID"] = i;44 dataRow["Name"] = $"{i}_Name";45 46 dataTableB.Rows.Add(dataRow);47 }48 49 if (dataTableB.Rows.Count > 0 && dataTableB.Rows[0] != null)50 {51 DataRow row = dataTableB.Rows[0];52 53 dataTableA.Rows.Add(row); // 这里会出异常54 }55 } 

if (dataTableB.Rows.Count > 0 && dataTableB.Rows[0] != null){ DataRow row = dataTableB.Rows[0]; dataTableA.Rows.Add(row.ItemArray);}