本文介绍了如何在ASP.Net GridView中使用图像而不是文本作为AutoGenerateEditButton的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我使用的是AutoGenerateEditButton以及Delete和Select。
I'm using AutoGenerateEditButton and the Delete and Select ones as well.
我想为链接使用图片而不是文本。
I'd like to use images instead of text for the links.
我该怎么做?
我不想手动创建命令列,因为使用了AutoGenerate属性在我正在处理的一个大型项目中。
I don't want to manually create the command columns, since the AutoGenerate properties are used throughout a large project I'm working on.
推荐答案
子类GridView控件,并通过CreateChildControls方法
Subclass the GridView control and over ride the CreateChildControls method
protected override int CreateChildControls(System.Collections.IEnumerable dataSource, bool dataBinding)
{
// re-use the AutoGenerate...Button properties
bool showDelete = AutoGenerateDeleteButton;
bool showEdit = AutoGenerateEditButton;
bool showSelect = AutoGenerateSelectButton;
// turn them all off, we'll be creating our own
AutoGenerateDeleteButton = false;
AutoGenerateEditButton = false;
AutoGenerateSelectButton = false;
// hide the column if it already exists
if (Columns[0].GetType() == typeof(CommandField))
{
Columns.RemoveAt(0);
}
// add the command column if necessary
if (showDelete || showEdit || showSelect)
{
CommandField cmdField = new CommandField();
cmdField.HeaderText = string.Empty;
cmdField.ButtonType = ButtonType.Image;
cmdField.ShowSelectButton = showSelect;
cmdField.ShowEditButton = showEdit;
cmdField.ShowDeleteButton = showDelete;
cmdField.DeleteImageUrl = "~/images/delete.bmp";
cmdField.EditImageUrl = "~/images/edit.bmp";
cmdField.SelectImageUrl = "~/images/select.bmp";
Columns.Insert(0, cmdField);
}
// this will show the grid even if there is no data
int numRows = base.CreateChildControls(dataSource, dataBinding);
//no data rows created, create empty table if enabled
if (numRows == 0 && ShowWhenEmpty)
{
//create table
Table table = new Table();
table.ID = this.ID;
//convert the exisiting columns into an array and initialize
DataControlField[] fields = new DataControlField[this.Columns.Count];
this.Columns.CopyTo(fields, 0);
if (this.ShowHeader)
{
//create a new header row
_headerRow2 = base.CreateRow(-1, -1, DataControlRowType.Header, DataControlRowState.Normal);
this.InitializeRow(_headerRow2, fields);
table.Rows.Add(_headerRow2);
}
//create the empty row
GridViewRow emptyRow = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
TableCell cell = new TableCell();
cell.ColumnSpan = this.Columns.Count;
cell.Width = Unit.Percentage(100);
if (!String.IsNullOrEmpty(EmptyDataText))
cell.Controls.Add(new LiteralControl(EmptyDataText));
if (this.EmptyDataTemplate != null)
EmptyDataTemplate.InstantiateIn(cell);
emptyRow.Cells.Add(cell);
table.Rows.Add(emptyRow);
if (this.ShowFooter)
{
//create footer row
_footerRow2 = base.CreateRow(-1, -1, DataControlRowType.Footer, DataControlRowState.Normal);
this.InitializeRow(_footerRow2, fields);
table.Rows.Add(_footerRow2);
}
this.Controls.Clear();
this.Controls.Add(table);
}
// I wanted one place to set alternating color for all instances of this control
base.AlternatingRowStyle.BackColor = System.Drawing.Color.LightBlue;
// now that the controls have been created, it's safe to reset these to their original values. They'll be needed if you bind data later
AutoGenerateDeleteButton = showDelete;
AutoGenerateEditButton = showEdit;
AutoGenerateSelectButton = showSelect;
return numRows;
}
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