在学习过程中中,将做工程过程中较好的代码段做个珍藏,如下代码内容是关于C#自定义的GridView操作类,简化GridView操作的代码,希望对码农有所用途。

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
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;
}
}
}

    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("rn", "").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("rn", "").Trim();
                break;
            }
        }
        return text;
    }

    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("rn", "").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("rn", "").Trim();
                if (l is DataBoundLiteralControl)
                {
                    cell.Text = GetStrPartly(text, maxLen);
                    break;
                }
                else
                {
                    l.Text = GetStrPartly(text, maxLen);
                    break;
                }
            }
        }
    }
    #endregion

    #region 公有方法
    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;
dc.DataType = typeof(string);
}
row[j] = text;
j++;
}
}
rowIndex++;
table.Rows.Add(row);
}
}
return table;
}

    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;
    }

    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
}

}