using System;
using System.Collections.Generic;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Collections;
using System.Reflection;
namespace DotNet.Utilities
{
public class GridViewHelper
{
#region 私有方法
/// <summary>
/// 截取内容长度
/// </summary>
/// <param name="o_Str">原字符串</param>
/// <param name="len">截取长度</param>
/// <returns>截取后字符串</returns>
private static string GetStrPartly(string o_Str, int len)
{
if (len == 0)
{
return o_Str;
}
else
{
if (o_Str.Length > len)
{
return o_Str.Substring(0, len) + "..";
}
else
{
return o_Str;
}
}
}
/// <summary>
/// 获取单元格内容
/// </summary>
/// <param name="cell">TableCell</param>
/// <returns>内容</returns>
private static string GetCellText(TableCell cell)
{
string text = cell.Text;
if (!string.IsNullOrEmpty(text))
{
return text;
}
foreach (Control control in cell.Controls)
{
if (control
!= null && control
is IButtonControl
) {
IButtonControl btn = control as IButtonControl;
text = btn.Text.Replace("\r\n", "").Trim();
break;
}
if (control
!= null && control
is ITextControl
) {
LiteralControl lc = control as LiteralControl;
if (lc != null)
{
continue;
}
ITextControl l = control as ITextControl;
text = l.Text.Replace("\r\n", "").Trim();
break;
}
}
return text;
}
/// <summary>
/// 设置单元格内容
/// </summary>
/// <param name="cell">TableCell</param>
/// <param name="maxLen">最大长度</param>
private static void SetCellText(TableCell cell, int maxLen)
{
string text = cell.Text;
if (!string.IsNullOrEmpty(text))
{
cell.Text = GetStrPartly(text, maxLen);
}
foreach (Control control in cell.Controls)
{
if (control
!= null && control
is IButtonControl
) {
IButtonControl btn = control as IButtonControl;
text = btn.Text.Replace("\r\n", "").Trim();
btn.Text = GetStrPartly(text, maxLen);
break;
}
if (control
!= null && control
is ITextControl
) {
LiteralControl lc = control as LiteralControl;
if (lc != null)
{
continue;
}
ITextControl l = control as ITextControl;
text = l.Text.Replace("\r\n", "").Trim();
if (l
is DataBoundLiteralControl
) {
cell.Text = GetStrPartly(text, maxLen);
break;
}
else
{
l.Text = GetStrPartly(text, maxLen);
break;
}
}
}
}
#endregion
#region 公有方法
/// <summary>
/// 从GridView的数据生成DataTable
/// </summary>
/// <param name="gv">GridView对象</param>
public static DataTable GridView2DataTable(GridView gv)
{
DataTable table
= new DataTable
(); int rowIndex = 0;
List
<string> cols
= new List
<string>(); if (!gv.ShowHeader && gv.Columns.Count == 0)
{
return table;
}
GridViewRow headerRow = gv.HeaderRow;
int columnCount = headerRow.Cells.Count;
for (int i = 0; i < columnCount; i++)
{
string text = GetCellText(headerRow.Cells[i]);
cols.Add(text);
}
foreach (GridViewRow r in gv.Rows)
{
if (r.RowType == DataControlRowType.DataRow)
{
DataRow row = table.NewRow();
int j = 0;
for (int i = 0; i < columnCount; i++)
{
string text = GetCellText(r.Cells[i]);
if (!String.IsNullOrEmpty(text))
{
if (rowIndex == 0)
{
string columnName = cols[i];
if (String.IsNullOrEmpty(columnName))
{
continue;
}
if (table.Columns.Contains(columnName))
{
continue;
}
DataColumn dc = table.Columns.Add();
dc.ColumnName = columnName;
}
row[j] = text;
j++;
}
}
rowIndex++;
table.Rows.Add(row);
}
}
return table;
}
/// <summary>
/// 将集合类转换成DataTable
/// </summary>
/// <param name="list">集合</param>
public static DataTable ToDataTable(IList list)
{
DataTable result
= new DataTable
(); if (list.Count > 0)
{
PropertyInfo[] propertys = list[0].GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
{
result.Columns.Add(pi.Name, pi.PropertyType);
}
for (int i = 0; i < list.Count; i++)
{
ArrayList tempList
= new ArrayList
(); foreach (PropertyInfo pi in propertys)
{
object obj = pi.GetValue(list[i], null);
tempList.Add(obj);
}
object[] array = tempList.ToArray();
result.LoadDataRow(array, true);
}
}
return result;
}
/// <summary>
/// 将泛型集合类转换成DataTable
/// </summary>
/// <typeparam name="T">集合项类型</typeparam>
/// <param name="list">集合</param>
/// <param name="propertyName">需要返回的列的列名</param>
/// <returns>数据集(表)</returns>
public static DataTable ToDataTable<T>(IList<T> list, params string[] propertyName)
{
List
<string> propertyNameList
= new List
<string>(); if (propertyName != null) propertyNameList.AddRange(propertyName);
DataTable result
= new DataTable
(); if (list.Count > 0)
{
PropertyInfo[] propertys = list[0].GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
{
if (propertyNameList.Count == 0)
{
result.Columns.Add(pi.Name, pi.PropertyType);
}
else
{
if (propertyNameList.Contains(pi.Name)) result.Columns.Add(pi.Name, pi.PropertyType);
}
}
for (int i = 0; i < list.Count; i++)
{
ArrayList tempList
= new ArrayList
(); foreach (PropertyInfo pi in propertys)
{
if (propertyNameList.Count == 0)
{
object obj = pi.GetValue(list[i], null);
tempList.Add(obj);
}
else
{
if (propertyNameList.Contains(pi.Name))
{
object obj = pi.GetValue(list[i], null);
tempList.Add(obj);
}
}
}
object[] array = tempList.ToArray();
result.LoadDataRow(array, true);
}
}
return result;
}
#endregion
}
}
//csharp/8579