DataGridView not displaying the add new row datagridview rowspan DataGridView show new/empty row on TOP of the Grid Datagridview: Can not change column background color after setting row background color? DataGridView.CurrentRow vs SelectedRow Datareader to array Dataset or datatable into DBF fi...
...扩:一般很少直接返回SqlDataReader对象的, ?...贴一个比较弱的转换(有更好的可以贴评论中的,我就先抛个砖头) public static IEnumerable SqlDataReaderToList(SqlDataReader reader...是否存在某列 if (reader.GetSchemaTable().DefaultView.Count > 0)...
if (pDataTable.Rows.Count != 0){ pDataRow = pDataTable.Rows[0];} return pDataRow;} 5、SqlDataReader.GetValues和DataRow.ItemArray = Values方法 该方法使用上面的原理，首先使用pSqlDataReader.GetValues(Values)将数据输出到数组Values中，然后定义一个DataRow，使用DataRow.ItemArray = ...
while (reader.Read()) { ReadSingleRow((IDataRecord)reader); } // Call Close when done reading. reader.Close(); } } private static void ReadSingleRow(IDataRecord record) { Console.WriteLine(String.Format("{0}, {1}", record[0], record[1])); } } 注解...
if (pDataTable.Rows.Count != 0) { pDataRow = pDataTable.Rows[0]; } return pDataRow; } 同样如果数据不符合则出现上面的错误。 4、SqlDataReader.GetValue和DataTable.LoadDataRow方法 首先使用pSqlDataReader.GetValues(Values)将数据输出到数组Values中,然后通过pDataTable.LoadDataRow(Values, false...
* None : Uses standard SQL ``INSERT`` clause (one per row). * 'multi': Pass multiple values in a single ``INSERT`` clause. * callable with signature ``(pd_table, conn, keys, data_iter)``. 1. 2. 3. 4. 5. 6. 7.
if(pDataSet.Tables[0].Rows.Count!=0) { pDataRow=pDataSet.Tables[0].Rows[0]; } returnpDataRow; } 该方法经常会出现数值转换错误：如nvarchar值'123456789011'的转换溢出了int列。超出了最大整数值。需要用户自己做排错处理。 3、DataTable.Load方法 方法的原理同上，先使用pDataTable.Load(pSqlData...
1CREATEPROCPaged2@pageIndexINT,3@pageCountINTOUTPUT,4@pageSizeINT5AS6DECLARE@countINT7SELECT@count=COUNT(*)FROMdbo.Student8SET@pageCount=CEILING(@count*1.0/@pageSize)9SELECT10*11FROM12(SELECTROW_NUMBER()OVER(ORDERBYdbo.Student.stuId)AStempId,*FROMdbo.Student)ASstu13WHEREtempId>=@pageSize*(...
while (reader.Read()) { // 如果这是第一行数据,我们需要为DataTable定义列 if (dataTable.Columns.Count == 0) { for (int i = 0; i < reader.FieldCount; i++) { dataTable.Columns.Add(reader.GetName(i), reader.GetFieldType(i)); } } // 创建DataRow并将数据添加到DataTable中 Dat...
“Invalid attempt to read when no data is present” and can't seem to find the cause. I have the following methods that I use in many places without issue. However in this one case it is causing the error. I confirmed in the method GetDataReader the reader has the row I...