如何对每个列包含字符串和数字的数据表进行排序 [英] how to sort datatable which each column contains both string and numbers
问题描述
嗨所有
i想要对每个列包含字符串和数字的数据网格进行排序。
i希望它按数字顺序排序，并将字符串作为数据表中的底部字符串。
dataview.sort = columnName +DESC可以让我排序它按自然顺序排列。
例如，quantitiy列排序为1,10,100,1000,2,20,200，N / A.这不是我想要实现的
。
有没有人对此有任何想法
谢谢
star
这是一个解决方案，但它严格来说是TSQL（datatable？）和c＃4.0将是前端：
USE [cpqaAnswers]
GO
CREATE TABLE [cpqa]。[tbl_CS_zeropadSolution003]
（
P_Id int，
amount varchar（50）
）
INSERT INTO [cpqa]。[tbl_CS_zeropadSolution003]
VALUES（1，'2340'），
（2， '4568'），
（3，'10000'）
SELECT * FROM [cpqa]。[tbl_CS_zeropadSolution003] - 麻烦ints为chars
SELECT * FROM [cpqa]。[tbl_CS_zeropadSolution003] ORDER BY [金额] - 不对（原文如此）
问题有多少个地方......任意选择一个数字，这里六（6）......但它并不重要......令人反感的那种：
SELECT [P_Id]，LEFT（REPLICATE（'0'， 6），6 - LEN（[金额]））+ [金额] AS [零padded_amount] FROM [cpqa]。[tbl_CS_zeropadSolution003]
/ *
结果：
P_Id zeropadded_amount
1 002340
2 004568
3 010000
* /
这是好的排序：
SELECT [P_Id]，LEFT（REPLICATE（' 0'，6），6 - LEN（[金额]））+ [金额] AS [zeropadded_amount] FROM [cpqa]。[tbl_CS_zeropadSolution003] ORDER BY [zeropadded_amount] DESC
/ *
结果：
P_Id zeropadded_amount
~~~~~~~~~~~~~~~~~~~~~~~~
3 010000
2 004568
1 002340
* /
// 假设您在ItemNo列中有混合文本和数字
// < span class =code-comment>创建表时，添加另一列将用于对此列进行排序
table.Columns.Add（ SortKeyItemNo）;
// 在填充表格时设置foreach循环中排序键的值
row [ SortKeyItemNo] = MakeSortKey（item [ ItemNo]）;
// 创建排序键的例程
string MakeSortKey（ string value ）
{
string key = value ; // 初始化传入值的键
Int32 num = 0 ;
bool result = Int32 .TryParse（ value ， out num）;
if （result）
{
// 使用填充值覆盖传入值
// 前缀为零的前缀编号，直到数字包含6个字符
key = num.ToString（）。PadLeft（ 6 ，' 0'）;
}
返回键;
}
我错了，你必须修改datagrid助手类。我认为网络形式不是胜利形式，我的错误。
// 在datagrid帮助器类中，在设置columnName变量之后但在设置dataView.Sort属性之前，在代码上方添加此行。
if （table.Columns.Contains（ SortKeyItemNo））
{
columnName = SortKey + columnName;
}
将它放在datagrid帮助器类中，[...放在这里......]文本是......
columnName = ;
// 获取所点击列的名称。
if （dataGrid.TableStyles.Count！= 0 ）
{
foreach （DataGridTableStyle item in dataGrid.TableStyles）
{
if （item.MappingName == dataTable.TableName）
{
columnName = item.GridColumnStyles [hitTest.Column] .MappingName;
}
}
}
else
{
columnName = dataTable.Columns [hitTest .COLUMN] .ColumnName;
}
[...放在这里......]
// 如果DataView的sort属性已经是当前的
// < span class =code-comment>列名，按降序对该列进行排序。
// 否则，按列名称排序。
if （ String .IsNullOrEmpty（dataView.Sort））
{
dataView.Sort = columnName + DESC;
}
else if （dataView.Sort == columnName + ASC）
{
dataView.Sort = columnName + DESC;
}
else dataView.Sort = columnName + ASC;
hi all
i would like to sort the datagrid which each column contains both string and numbers.
i want it sorted in numeric order and make the string as the bottom ones in the datatable.
The dataview.sort=columnName+"DESC" can just let me sort it in natural order.
for example ,the quantitiy column sort as 1,10,100,1000,2,20,200,N/A. And this is not what i
want to achieve.
Does anyone have any idea about this
thanks
star
Here is one solution but it's strictly TSQL ("datatable"?) and c#4.0 would be the frontend:
USE [cpqaAnswers] GO CREATE TABLE [cpqa].[tbl_CS_zeropadSolution003] ( P_Id int, amount varchar(50) ) INSERT INTO [cpqa].[tbl_CS_zeropadSolution003] VALUES(1, '2340'), (2, '4568'), (3, '10000') SELECT * FROM [cpqa].[tbl_CS_zeropadSolution003] -- trouble with "ints" as "chars" SELECT * FROM [cpqa].[tbl_CS_zeropadSolution003] ORDER BY [amount] -- not right (sic)
How many places is the question ... arbitrarily pick a number, here six (6) ... but it doesn't really matter ... the objectionable sort too:
SELECT [P_Id], LEFT(REPLICATE('0', 6), 6 - LEN([amount])) + [amount] AS [zeropadded_amount] FROM [cpqa].[tbl_CS_zeropadSolution003] /* result: P_Id zeropadded_amount 1 002340 2 004568 3 010000 */
Here's the good sort:
SELECT [P_Id], LEFT(REPLICATE('0', 6), 6 - LEN([amount])) + [amount] AS [zeropadded_amount] FROM [cpqa].[tbl_CS_zeropadSolution003] ORDER BY [zeropadded_amount] DESC /* result: P_Id zeropadded_amount ~~~~~~~~~~~~~~~~~~~~~~~~ 3 010000 2 004568 1 002340 */
// let's say you have mixed text and numbers in the ItemNo column // when you create your table, add another column that will be used to sort for this column table.Columns.Add("SortKeyItemNo");
// set the value for the sort key in your foreach loop when you populate your table row["SortKeyItemNo"] = MakeSortKey(item["ItemNo"]);
// routine to create sort key string MakeSortKey(string value) { string key = value; // initialize key to incoming value Int32 num = 0; bool result = Int32.TryParse(value, out num); if (result) { // override incoming value with padding value // prefixes leading zeros to number, until the number contains 6 characters key = num.ToString().PadLeft(6, '0'); } return key; }
I was wrong, you will have to modify the datagrid helper class. I was thinking web form not win form, my mistake.
// in the datagrid helper class, add this line above the code after you set the columnName variable but before you set the dataView.Sort property. if(table.Columns.Contains("SortKeyItemNo")) { columnName = "SortKey" + columnName; }
Place it in the datagrid helper class, where the [...place here...] text is...
columnName = ""; // Get the name of the column that was clicked. if (dataGrid.TableStyles.Count != 0) { foreach (DataGridTableStyle item in dataGrid.TableStyles) { if (item.MappingName == dataTable.TableName) { columnName = item.GridColumnStyles[hitTest.Column].MappingName; } } } else { columnName = dataTable.Columns[hitTest.Column].ColumnName; } [...place here...] // If the sort property of the DataView is already the current // column name, sort that column in descending order. // Otherwise, sort on the column name. if (String.IsNullOrEmpty(dataView.Sort)) { dataView.Sort = columnName + " DESC"; } else if (dataView.Sort == columnName + " ASC") { dataView.Sort = columnName + " DESC"; } else dataView.Sort = columnName + " ASC";
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