Forms 自定义GridView-AddCustomControlsRow on PreRender清空数据行
我正在尝试创建一个带有附加功能的自定义GridView，但我确实有问题，因为回发是通过“按钮2”进行“模拟”的。在每次回发（第一次数据绑定后）中，一个数据行的内容将被擦除，直到GridView完全为空。它与PreRender事件中的AddCustomControls（）有关。但我不知道如何解决这个问题。有人有主意吗？任何帮助都将不胜感激 也许下面的图片比我的文字更能描述这种行为 OnLoad事件中的DataBind（）和OnDataBound事件中的AddCustomControls工作得非常好。两次回发之间的表保持完全相同。但是当我试图实现网格的编辑时，我不能再使用这个“解决方案”（也不是很优雅）。逻辑上，文本框中编辑的值被OnLoad中的DataBind（）覆盖 不知何故，它与“headerTable.Rows.AddAt（1，controlRow）；”有关。如果我执行“headerTable.Rows.Add（controlRow）；”，它将行添加到末尾，那么一切都会正常进行。所以这种标题行被清除后的内容 Web.configForms 自定义GridView-AddCustomControlsRow on PreRender清空数据行,forms,gridview,webforms,web,grid,Forms,Gridview,Webforms,Web,Grid,我正在尝试创建一个带有附加功能的自定义GridView，但我确实有问题，因为回发是通过“按钮2”进行“模拟”的。在每次回发（第一次数据绑定后）中，一个数据行的内容将被擦除，直到GridView完全为空。它与PreRender事件中的AddCustomControls（）有关。但我不知道如何解决这个问题。有人有主意吗？任何帮助都将不胜感激 也许下面的图片比我的文字更能描述这种行为 OnLoad事件中的DataBind（）和OnDataBound事件中的AddCustomControls工作得非常好
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
<pages>
<controls>
<add tagPrefix="asp" assembly="WebApplication11" namespace="WebApplication11"/>
</controls>
</pages>
</system.web>
</configuration>
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
DataTable tbl = new DataTable();
DataRow row;
tbl.Columns.Add("Spalte A");
tbl.Columns.Add("Spalte B");
tbl.Columns.Add("Spalte C");
row = tbl.NewRow();
row[0] = "Spalte A, Zeile 1";
row[1] = "Spalte B, Zeile 1";
row[2] = "Spalte C, Zeile 1";
tbl.Rows.Add(row);
row = tbl.NewRow();
row[0] = "Spalte A, Zeile 2";
row[1] = "Spalte B, Zeile 2";
row[2] = "Spalte C, Zeile 2";
tbl.Rows.Add(row);
row = tbl.NewRow();
row[0] = "Spalte A, Zeile 3";
row[1] = "Spalte B, Zeile 3";
row[2] = "Spalte C, Zeile 3";
tbl.Rows.Add(row);
mightyGridView.DataSource = tbl;
mightyGridView.DataBind();
}
public class MightyGridView : GridView
{
public MightyGridView()
{
_images = new Dictionary<_imageTypes, string>();
_images.Add(_imageTypes.SortAsc, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOwwAADsMBx2+oZAAAAAd0SU1FB9oGEAstLlCBjxcAAABWSURBVBjTY/z45TsDqYCFkYF0wMTAyMiADW/ese8/LjkmbCZt3r73PzKNYRMjAwMDMkZXuHn73v/oalBs2oTDZHRxJph2XBpQNELVMn759pOM0CMDAADRtiJL6bIYOQAAAABJRU5ErkJggg==");
_images.Add(_imageTypes.SortAscActive, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9oHDgckDaeYtVQAAAA1SURBVBjTY/z//z8DqYCJgQyAU5NK2Yb/JGmCacClkYmQDdg0MhHjJHRxJmL8gC7PSLcgBwAAMRqcsjcZIwAAAABJRU5ErkJggg==");
_images.Add(_imageTypes.SortDesc, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOwwAADsMBx2+oZAAAAAd0SU1FB9oGEAstDmvvr98AAABhSURBVBjTY/zy7ScDqYCJgQzA8p/hPwMDAwPDpm17/xNS7OflzAix6T8DA8N/BgY/T4gATg2ezowwtUwYErg0IPsJqhmOfdEU+Ho6M6KrwRoQMI2+OGxm/PTlOzmhRzoAADvsH5oZ616EAAAAAElFTkSuQmCC");
_images.Add(_imageTypes.SortDescActive, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9oHDgckFi39fLgAAABBSURBVBjTY/z//z8DqYCJgQzAAmOolG0gaOWdrgBGFJtgAoQ0YDgPl0Z0cSZCCrAa9P//f6xYuXT9f1xyjHQLcgCoNDp3uWsOTwAAAABJRU5ErkJggg==");
_images.Add(_imageTypes.HideColumn, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9oGEAsyFSzQaK0AAADHSURBVBjThZAxCoNQDIbTnsAbCM4eQfAC4uYstCdwFOd2dXNwFZzcxQtI3+bkrIKz4AW+Ln2l7WtpIJB8yf9DIoAAsq4rVVWx77topnMcR6ZpQvdHecS2bXJTSrIsYxgGNE/TFKWU2LZ90MxwvVwvBEFAXdd4nodSis8dQwTI6XTGsiz6vufb3ABd1+G6Lnme4/v+f9E8zziOQ1mWAFIUxbP+KYqiyHCP49gQPb8nIrIsi4Rh+IokSRJp25Y3+OrQNM3XGz7zDsbcHXO0jDwtAAAAAElFTkSuQmCC");
_images.Add(_imageTypes.ShowAllColumns, "data:;base64,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");
}
private enum _imageTypes { SortAsc, SortAscActive, SortDesc, SortDescActive, HideColumn, ShowAllColumns }
private readonly Dictionary<_imageTypes, string> _images;
public new bool AllowSorting { get; set; }
public bool AllowHiding { get; set; }
public override object DataSource
{
get
{
return Page.Session[this.ID + ".DataSource"];
}
set
{
Page.Session[this.ID + ".DataSource"] = value;
base.DataSource = value;
}
}
private void AddCustomControlsRow()
{
if (DataSource != null)
{
if (AllowSorting || AllowHiding)
{
DataTable dataTable = GetDataTableFromDataSource();
if (dataTable.Columns.Count > 0 && dataTable.Rows.Count > 0)
{
if (this.HeaderRow != null && this.HeaderRow.Parent != null)
{
string sortExpression = dataTable.DefaultView.Sort.Replace(" ASC", "").Replace(" DESC", "");
SortDirection sortDirection = dataTable.DefaultView.Sort.EndsWith(" ASC") ? SortDirection.Ascending : SortDirection.Descending;
Table headerTable = (Table)this.HeaderRow.Parent;
GridViewRow controlRow = new GridViewRow(-1, -1, DataControlRowType.Header, DataControlRowState.Normal);
TableCell controlCell;
ImageButton imageButton;
foreach (TableCell cell in this.HeaderRow.Cells)
{
// Sicherstellen, dass es nicht die Spalte mit den Bearbeiten-Buttons ist, welche keine Überschrift enthält.
if (!(cell.Text.Replace(" ", "").Trim().Length > 0))
{
controlCell = new TableCell();
cell.Attributes.Add("style", "border-bottom: 0");
controlCell.Attributes.Add("style", "border-top: 0; text-align: center");
controlRow.Cells.Add(controlCell);
}
else
{
controlCell = new TableCell();
cell.Attributes.Add("style", "border-bottom: 0");
controlCell.Attributes.Add("style", "border-top: 0; text-align: center");
if (AllowSorting)
{
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(SortColumnAscButton_Click);
if (sortExpression == cell.Text && sortDirection == SortDirection.Ascending)
imageButton.ImageUrl = _images[_imageTypes.SortAscActive];
else
imageButton.ImageUrl = _images[_imageTypes.SortAsc];
controlCell.Controls.Add(imageButton);
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(SortColumnDescButton_Click);
if (sortExpression == cell.Text && sortDirection == SortDirection.Descending)
imageButton.ImageUrl = _images[_imageTypes.SortDescActive];
else
imageButton.ImageUrl = _images[_imageTypes.SortDesc];
controlCell.Controls.Add(imageButton);
controlRow.Cells.Add(controlCell);
}
if (AllowHiding)
{
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(HideColumnButton_Click);
imageButton.ImageUrl = _images[_imageTypes.HideColumn];
controlCell.Controls.Add(imageButton);
controlRow.Cells.Add(controlCell);
}
}
}
headerTable.Rows.AddAt(1, controlRow);
}
}
}
}
}
public static DataTable GetDataTableFromIEnumerable(IEnumerable enumerable)
{
DataTable dataTable = new DataTable();
DataRow row;
PropertyInfo[] propertyInfos;
foreach (object obj in enumerable)
{
propertyInfos = obj.GetType().GetProperties();
if (dataTable.Columns.Count == 0)
foreach (PropertyInfo pi in propertyInfos)
dataTable.Columns.Add(pi.Name, pi.PropertyType);
row = dataTable.NewRow();
foreach (PropertyInfo pi in propertyInfos)
{
object value = pi.GetValue(obj, null);
row[pi.Name] = value;
}
dataTable.Rows.Add(row);
}
return dataTable;
}
private DataTable GetDataTableFromDataSource()
{
DataTable dataTable;
if (DataSource is DataTable)
dataTable = (DataTable)DataSource;
else if (DataSource is IEnumerable)
dataTable = GetDataTableFromIEnumerable((IEnumerable)DataSource);
else
throw new NotSupportedException("Typ wird nicht unterstützt.");
return dataTable;
}
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
}
protected override void OnLoad(EventArgs e)
{
// Weg der funktionierte, jedoch mit Editing Probleme macht: OnLoad: DataBind() / OnDataBound: AddCustomControls.
// Das DataBinding überschrieb die geänderten Werte wieder.
base.OnLoad(e);
}
protected override void OnDataBinding(EventArgs e)
{
base.OnDataBinding(e);
}
protected override void OnDataBound(EventArgs e)
{
base.OnDataBound(e);
}
protected override void OnPreRender(EventArgs e)
{
AddCustomControlsRow();
base.OnPreRender(e);
}
protected override void OnUnload(EventArgs e)
{
base.OnUnload(e);
}
protected void SortColumnAscButton_Click(object sender, ImageClickEventArgs e)
{
DataTable dataTable = GetDataTableFromDataSource();
dataTable.DefaultView.Sort = ((ImageButton)sender).Attributes["data-column-name"] + " ASC";
DataSource = dataTable;
DataBind();
}
protected void SortColumnDescButton_Click(object sender, ImageClickEventArgs e)
{
DataTable dataTable = GetDataTableFromDataSource();
dataTable.DefaultView.Sort = ((ImageButton)sender).Attributes["data-column-name"] + " DESC";
DataSource = dataTable;
DataBind();
}
protected void HideColumnButton_Click(object sender, ImageClickEventArgs e)
{
// todo: Improve. Backup zum resetten, etc.
DataTable dataTable = GetDataTableFromDataSource();
dataTable.Columns.Remove(((ImageButton)sender).Attributes["data-column-name"]);
DataSource = dataTable;
DataBind();
}
public类MightyGridView:GridView
{
public MightyGridView（）
{
_images=新字典（）；
_添加（_imageTypes.SortAsc，“数据：；base64，Ivborw0kgoaaaansuhueugaaaaaaaaaaaaaaaaaaadpeqqaaaaaaaaaaaaaaaaxnsr0iars4c6qaaazis0deap8a/wD/ol2nkwaaalwsflzaaaowawaadsmbx2+ozaaaad0su1f9ogestllcbjcaabwsurbvbjty/z45tsdqykyfyf0wmtaymiadw/ese8/ljkmcz3r73pznyqjjjjjjkjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjkkkjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj；
_添加（_imageTypes.SortAscActive，“数据：；base64，IVBorW0KggoaaaAnsuhueugaaa0AAJCAyaaadPEQQQaaaaaaaaaAzis0IARS4C6QaaAzis0DEAP8A/wD/OL2KWAAALWSFLZAAAOXAADSQBLSSOGWAAD0SU1FB9OHDGCKDAEYTVQAA1SURBBJTY/z////Z8DQYCQYCQYCQYCQQYAU5NK2YB/JMCACCLKYMLKYMK7PSLCHHJJJJJJJJW8GJAAAG8G8GC7PS7PSKKKKJJJJWKKKKJJJJJJJJJJ；
_图像.添加（_imageTypes.SortDesc，“数据：；base64，Ivborw0kgoaaaansuheugaaaaa0aajcayaaadpeqqqaaaaaaaaaaxnsr0iars4c6qaaazis0deap8a/wD/ol2nkwaadsmbx2+ozaaaad0su1f9oqb9aaabhsurbvbjty/zy7scdqyqjgqza8p/hPwMDAwPDpm17/xNS7OflzAix6T8DA8N/BgY/t4g2eqg2ewwwwwwwwwwyqwyq2ipsoqwjj2sof2sof2sof2sof2b9b9b9wqqqqw6mjjjjjjjjjjjjjjjjjjjjjjjj2b9a6;
_添加（_imageTypes.SortDescActive，“数据：；base64，IVBorW0KggoaaaAnsuhueugaaaaaaaaaaAaAaAaAaAaAdEqQaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAdEqaAaAaAaAaAaAaAaAaAiS0IArS4a6aAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdA；
_images.Add（_imageTypes.HideColumn，"数据：base64，IVBorW0KggoaaaAnsuhueugaaaaaaaaaaaaaaaaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAaAdAdAaAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdAdA4/v+f9E8zziOQ1mWAFIUxbP+KYqiyHCP49gQPb8nIrIsi4Rh+IokSRJp25Y3+或QNM3xGZD7ZDSBCHxO0JDAAAELFTKSUQMCC”）；
_添加（_imageTypes.ShowAllColumns，“数据：基础64；数据：数据：基础64；基础64，研究者们在研究中发现了一个半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半半U/fX+2YX33）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（3）B（4）B（5）B（5）B（5）B（5）B（5）B（5）B（5）B（5）B）B（6）6）B（6（6）6）6）B（6）6）6）6）6）6）6）6）6）6）6）6）6）6）6（6（6（6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6）6/21C7sOnn/nRPzO47PvXls9vWj97Z9c4.这个词的意思是：这个词的意思意思是：这个词的意思是：这个词的意思是：这个词的意思意思是：这个词的意思意思是：这个词的意思是：这个词的意思意思是：这个词的意思是：这个词的意思是：这个词的意思是：这个词的意思是：这个词的意思是：这个词的意思是：这个词的意思是：这个词的意思是：这个词的意思是：这个单词的意思是：这个单词的意思是一个单词的意思是一个单词的意思是一个单词的意思是一个单词的意思是一个单词的意思是一个单词的意思意思是一个单词的意思是一个单词，一个单词的意思是一个单词的意思是一个单词，一个单词的意思是一个单词的意思是一个单词的意思是一个单词，一个单词的意思是一个单词，一个单词，或者一个单词，一个单词的意思是一个单词的意思是一个单词的意思是CZYW9JT/YNIXGVCEX5YB2.这两个词的意思是一个词的意思意思意思意思意思意思意思是一个词的意思意思意思是一个词的意思意思意思是：这个词的意思是一个词的意思意思是一个词的意思意思是一个词的意思是一个单词的意思意思是一个单词的意思是一个单词的意思意思是一个单词的意思是一个单词的意思是一个单词的意思意思是一个单词的意思意思是一个单词的意思是一个单词，或者或者一个单词的意思意思是一个单词的意思意思是一个单词或者或者或者或者一个单词的意思意思意思是一个单词的意思是一个单词或者或者或者或者一个单词的意思是一个单词，或者或者或者或者一个或者或者或者或者一个或者一个或者或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者一个或者或者或者二HB5STYBK8BOVBZO82 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 W9BBX8TiVK7RA48OMSBunnelBPVGDFQAMZD2.这两个数字是一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，这个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字，一个数字BKHNWTXORMSTSSNWPRTJWO9yHep0ALtfLZ3m1jEZD+PXhP8y8D40GJ/ZNu5bsCgN9XmfjW4dKaLmtFc41WSPgxvPLTC+4z6Ev+Q4crdv72cm39325bWfNK2/seyFDv+i5XC4SiTx80R8w/WMQXEPFF8NAAAAAAABJRU5ERKJGG=”；
}
私有枚举_图像类型{SortAsc、sortascacative、SortDesc、sortdesactive、HideColumn、ShowAllColumns}
私有只读字典_图像；
公共新布尔允许排序{get；set；}
公共布尔允许{get；set；}
公共覆盖对象数据源
{
得到
{
返回Page.Session[this.ID+“.DataSource”]；
}
设置
{
Page.Session[this.ID+”
public class MightyGridView : GridView
{
public MightyGridView()
{
_images = new Dictionary<_imageTypes, string>();
_images.Add(_imageTypes.SortAsc, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOwwAADsMBx2+oZAAAAAd0SU1FB9oGEAstLlCBjxcAAABWSURBVBjTY/z45TsDqYCFkYF0wMTAyMiADW/ese8/LjkmbCZt3r73PzKNYRMjAwMDMkZXuHn73v/oalBs2oTDZHRxJph2XBpQNELVMn759pOM0CMDAADRtiJL6bIYOQAAAABJRU5ErkJggg==");
_images.Add(_imageTypes.SortAscActive, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9oHDgckDaeYtVQAAAA1SURBVBjTY/z//z8DqYCJgQyAU5NK2Yb/JGmCacClkYmQDdg0MhHjJHRxJmL8gC7PSLcgBwAAMRqcsjcZIwAAAABJRU5ErkJggg==");
_images.Add(_imageTypes.SortDesc, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOwwAADsMBx2+oZAAAAAd0SU1FB9oGEAstDmvvr98AAABhSURBVBjTY/zy7ScDqYCJgQzA8p/hPwMDAwPDpm17/xNS7OflzAix6T8DA8N/BgY/T4gATg2ezowwtUwYErg0IPsJqhmOfdEU+Ho6M6KrwRoQMI2+OGxm/PTlOzmhRzoAADvsH5oZ616EAAAAAElFTkSuQmCC");
_images.Add(_imageTypes.SortDescActive, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9oHDgckFi39fLgAAABBSURBVBjTY/z//z8DqYCJgQzAAmOolG0gaOWdrgBGFJtgAoQ0YDgPl0Z0cSZCCrAa9P//f6xYuXT9f1xyjHQLcgCoNDp3uWsOTwAAAABJRU5ErkJggg==");
_images.Add(_imageTypes.HideColumn, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9oGEAsyFSzQaK0AAADHSURBVBjThZAxCoNQDIbTnsAbCM4eQfAC4uYstCdwFOd2dXNwFZzcxQtI3+bkrIKz4AW+Ln2l7WtpIJB8yf9DIoAAsq4rVVWx77topnMcR6ZpQvdHecS2bXJTSrIsYxgGNE/TFKWU2LZ90MxwvVwvBEFAXdd4nodSis8dQwTI6XTGsiz6vufb3ABd1+G6Lnme4/v+f9E8zziOQ1mWAFIUxbP+KYqiyHCP49gQPb8nIrIsi4Rh+IokSRJp25Y3+OrQNM3XGz7zDsbcHXO0jDwtAAAAAElFTkSuQmCC");
_images.Add(_imageTypes.ShowAllColumns, "data:;base64,iVBORw0KGgoAAAANSUhEUgAAAB4AAAAfCAIAAAB/DupQAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAYdSURBVEhLtZXrb5NlGMb3/6AQjXzigyQaEwwGDDGixGDYQEUSFUWDcnACE7fhtq4HtpX2LV27Hmi7Q0e3MTbWLJtkAyY4NybqGId1Ze16Prynet3P87Yj+4zNnSZ7CL9cua7rvltl6F3FtPastgSeNfmjjd7oL+6Vc85Irf3pKeHJccvjDXOs/dFXpodH9Iuftvxb8+s/Hzf8/dH5Bx/U/fX+2YX3frq/p3b+3dPzu07N5fP5KkDnnpZmn5TuPS79vlS6s1gKz6vfdjyaWFDHF9TwnDZX76h7zy7gz7E5dXRWHflDvXZX8U4qeAzeUnqmlCuTsmdS6gxL9QHxtcN3VlZWquo90ZnFUrH8uRCIXexPfK5bxP+sPOr6UqZQZucPf4JSeTznSTb4s3g0D0uVx1p3+hshtblmemlpqerHy8uhGaXrRgz/XOdaPnE5VudN7K9/0ODPHOuI4PFMV+yQfvXrS4ntR++2hsQ6VxSP31mj+5sTB1rTeDzhyFc3LeOxORDbfSb61umVTQemCH1Yt/Thzw/21C7sOnn/nRPzO47PvXls9vWj97Z9cRffWw/PbJhXP7m95dDtLQdvbT546+Wa6ZeqtdlUPQViZQh92TdaYh+VDz6KOj49pyglWVElWZFkVaRRwlOzRUkpiHKhqOQLSq4o5wryyMRMNi9n8lI6J6eyUiorJjPS7urvCS103+BUVRtVUdTuoZv4BpQPuKKk+EITBVHJg8ugmGxBdnaPMq6UJq6UzIqJjLR9zxFC2wOjjMvlEhdi/QMT+JbBlTDEhV5PMAwo0FxvtiBl8nKnfyiTk1JskkBnpERG3LqjWjOE+UADLke7e0fJCknlUBpRcfiHCQ29RRkmkA85yeruh1ioJm6WuIl0GW29cj18czYw9Jt/YNIXGvcEx5yBYbs3hBffwIS3f9zdN+bsvt7pGxRcQXcw7OodcwTw55DgCVmcfe32gM03LHiHrJ5BiztkdoX0Qq+m2ua5piolhSSTahYdeU3RwQqR9DKLZRhCVkAvWSFlcjLE2rxDZYvhsriWxhQ1tMU7zLjMinJu0As0oGUuoZ29I2QxoGQFcdNZ0erqT2aoFWucmyrGU2VDzF2DG7iwGAK5v6SXtQJ6kRgqwarGuIguK5kdfUDDXwygmFiyrJqjyQfeYhYdEmMVrlRNyRYUCGQ+sAozbiojmmx+QLkPcUhOPoduc4bGbt57LrGRTt+AdT2xEbt/yOYZQGId9gDF5UZ6wQ5Hb5stYBK8BovbZO822gIGwa+z+HRmT4PRpXlt6grJClZO4XtRlFTodfeFC5UKs6pBr+AZYJLZamRYhdOiSQiQ3nQxlqJZTdJo6HZHqMLlLYYPnagw3MA2o8W8EjnJ7AxyH4jLKgwf9BYP+cu4cBncZ4ky+qK9n1YZFovrlRA8/XyVMeQvVjkvocJsNagPiI75K7Z0uGBxRS+46+hWR5+2dbxqRVINW2nleB+oZ1QJo8Wd4j6gEmhbClUTm9vsQHMfVpMFQq8VNEP0wtX/K8ZWoYf3F9eSXzUMYtzQX1iMGHmF4UOctRg+IEbuL9NbjK4VMJrqJmtgw9bBX8TIVk7rA48OMSbSUnnlEBpVGDFqaMZdYaOhm81XSDLpRR+oEtCLGLWVY1cYA38RI4+O58b7gBhh7rMEieXoSLyCvuRjXHYtGReDGEkyv+48tzTFqHGZXsotUUSM0QT0Mslx4kZiZTQaMhiedtAhHRTc/WZHb7vgM5qdVveAxYWt626z+U1Wr8Hs1Ld3GgW/weLVm926dmdLm6PZZG82CheMjkZjZ4PBXm+w1ettPzUJ6w3hP0jl604W2zyD7FRSf/lVQ27gxtj14XqRG5ReMHZWfFiJ5yF5eV210AOLUWG2GtRfumfOoLYa2umha4nENIsTrL/wN1FoNNgourIVMGQ5ll9vCK0GobVTSdshBKhnWtXoRMSTsNWprTJWo9yHep0ALtfLZ3m1jEZD+PXhP8y8D40GJ/ZNu5bsCgN9XmfjW4dKaLmtFc41WSPgxvPLTC+4z6Ev+Q4crdv72cm39325bWfNK2/seyFDv+i5XC4SiTx80R8w/wMqxePff8NAaAAAAABJRU5ErkJggg==");
}
private enum _imageTypes { SortAsc, SortAscActive, SortDesc, SortDescActive, HideColumn, ShowAllColumns }
private readonly Dictionary<_imageTypes, string> _images;
public new bool AllowSorting { get; set; }
public bool AllowHiding { get; set; }
public override object DataSource
{
get
{
return Page.Session[this.ID + ".DataSource"];
}
set
{
Page.Session[this.ID + ".DataSource"] = value;
base.DataSource = value;
}
}
private void AddCustomControlsRow()
{
if (DataSource != null)
{
if (AllowSorting || AllowHiding)
{
DataTable dataTable = GetDataTableFromDataSource();
if (dataTable.Columns.Count > 0 && dataTable.Rows.Count > 0)
{
if (this.HeaderRow != null && this.HeaderRow.Parent != null)
{
string sortExpression = dataTable.DefaultView.Sort.Replace(" ASC", "").Replace(" DESC", "");
SortDirection sortDirection = dataTable.DefaultView.Sort.EndsWith(" ASC") ? SortDirection.Ascending : SortDirection.Descending;
Table headerTable = (Table)this.HeaderRow.Parent;
GridViewRow controlRow = new GridViewRow(-1, -1, DataControlRowType.Header, DataControlRowState.Normal);
TableCell controlCell;
ImageButton imageButton;
foreach (TableCell cell in this.HeaderRow.Cells)
{
// Sicherstellen, dass es nicht die Spalte mit den Bearbeiten-Buttons ist, welche keine Überschrift enthält.
if (!(cell.Text.Replace(" ", "").Trim().Length > 0))
{
controlCell = new TableCell();
cell.Attributes.Add("style", "border-bottom: 0");
controlCell.Attributes.Add("style", "border-top: 0; text-align: center");
controlRow.Cells.Add(controlCell);
}
else
{
controlCell = new TableCell();
cell.Attributes.Add("style", "border-bottom: 0");
controlCell.Attributes.Add("style", "border-top: 0; text-align: center");
if (AllowSorting)
{
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(SortColumnAscButton_Click);
if (sortExpression == cell.Text && sortDirection == SortDirection.Ascending)
imageButton.ImageUrl = _images[_imageTypes.SortAscActive];
else
imageButton.ImageUrl = _images[_imageTypes.SortAsc];
controlCell.Controls.Add(imageButton);
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(SortColumnDescButton_Click);
if (sortExpression == cell.Text && sortDirection == SortDirection.Descending)
imageButton.ImageUrl = _images[_imageTypes.SortDescActive];
else
imageButton.ImageUrl = _images[_imageTypes.SortDesc];
controlCell.Controls.Add(imageButton);
controlRow.Cells.Add(controlCell);
}
if (AllowHiding)
{
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(HideColumnButton_Click);
imageButton.ImageUrl = _images[_imageTypes.HideColumn];
controlCell.Controls.Add(imageButton);
controlRow.Cells.Add(controlCell);
}
}
}
headerTable.Rows.AddAt(1, controlRow);
}
}
}
}
}
public static DataTable GetDataTableFromIEnumerable(IEnumerable enumerable)
{
DataTable dataTable = new DataTable();
DataRow row;
PropertyInfo[] propertyInfos;
foreach (object obj in enumerable)
{
propertyInfos = obj.GetType().GetProperties();
if (dataTable.Columns.Count == 0)
foreach (PropertyInfo pi in propertyInfos)
dataTable.Columns.Add(pi.Name, pi.PropertyType);
row = dataTable.NewRow();
foreach (PropertyInfo pi in propertyInfos)
{
object value = pi.GetValue(obj, null);
row[pi.Name] = value;
}
dataTable.Rows.Add(row);
}
return dataTable;
}
private DataTable GetDataTableFromDataSource()
{
DataTable dataTable;
if (DataSource is DataTable)
dataTable = (DataTable)DataSource;
else if (DataSource is IEnumerable)
dataTable = GetDataTableFromIEnumerable((IEnumerable)DataSource);
else
throw new NotSupportedException("Typ wird nicht unterstützt.");
return dataTable;
}
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
}
protected override void OnLoad(EventArgs e)
{
// Weg der funktionierte, jedoch mit Editing Probleme macht: OnLoad: DataBind() / OnDataBound: AddCustomControls.
// Das DataBinding überschrieb die geänderten Werte wieder.
base.OnLoad(e);
}
protected override void OnDataBinding(EventArgs e)
{
base.OnDataBinding(e);
}
protected override void OnDataBound(EventArgs e)
{
base.OnDataBound(e);
}
protected override void OnPreRender(EventArgs e)
{
AddCustomControlsRow();
base.OnPreRender(e);
}
protected override void OnUnload(EventArgs e)
{
base.OnUnload(e);
}
protected void SortColumnAscButton_Click(object sender, ImageClickEventArgs e)
{
DataTable dataTable = GetDataTableFromDataSource();
dataTable.DefaultView.Sort = ((ImageButton)sender).Attributes["data-column-name"] + " ASC";
DataSource = dataTable;
DataBind();
}
protected void SortColumnDescButton_Click(object sender, ImageClickEventArgs e)
{
DataTable dataTable = GetDataTableFromDataSource();
dataTable.DefaultView.Sort = ((ImageButton)sender).Attributes["data-column-name"] + " DESC";
DataSource = dataTable;
DataBind();
}
protected void HideColumnButton_Click(object sender, ImageClickEventArgs e)
{
// todo: Improve. Backup zum resetten, etc.
DataTable dataTable = GetDataTableFromDataSource();
dataTable.Columns.Remove(((ImageButton)sender).Attributes["data-column-name"]);
DataSource = dataTable;
DataBind();
}
protected override void OnRowCreated(GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Header)
{
if (AllowSorting || AllowHiding)
AddHeaderControls(e.Row);
}
base.OnRowCreated(e);
}
foreach (TableCell cell in row.Cells)
{
// Sicherstellen, dass es nicht die Spalte mit den Bearbeiten-Buttons ist, welche keine Überschrift enthält.
if (cell.Text.Replace("&nbsp;", string.Empty).Trim().Length > 0)
{
// Write the Header Text into the cell as a (Literal)Control, because it would be lost otherwise.
cell.Controls.Add(new LiteralControl(cell.Text));
cell.Controls.Add(new LiteralControl("<br />"));
if (AllowSorting)
{
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(SortColumnAscButton_Click);
if (sortExpression == cell.Text && sortDirection == SortDirection.Ascending)
imageButton.ImageUrl = _images[_imageTypes.SortAscActive];
else
imageButton.ImageUrl = _images[_imageTypes.SortAsc];
cell.Controls.Add(imageButton);
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(SortColumnDescButton_Click);
if (sortExpression == cell.Text && sortDirection == SortDirection.Descending)
imageButton.ImageUrl = _images[_imageTypes.SortDescActive];
else
imageButton.ImageUrl = _images[_imageTypes.SortDesc];
cell.Controls.Add(imageButton);
}
if (AllowHiding)
{
imageButton = new ImageButton();
imageButton.Attributes.Add("data-column-name", cell.Text);
imageButton.Click += new ImageClickEventHandler(HideColumnButton_Click);
imageButton.ImageUrl = _images[_imageTypes.HideColumn];
cell.Controls.Add(imageButton);
}
}
}