我在运行时动态构建了 gridview 绑定到数据表,以及保存放置在 gridview 之外的 gridview 数据的按钮
1-创建网格视图
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
CreateGrid();
}
}
void CreateGrid()
{
int nTransID = Convert.ToInt32(Session["trans_id"]);
//
string strSQL = @"EXEC [dbo].[sp_GetTransaction] " + nTransID;
DataTable dtData = clsGlobal.GetDataTable(strSQL);
//
if (ViewState["dtTransDetail"] == null) ViewState.Add("dtTransDetail", dtData);
else ViewState["dtTransDetail"] = dtData;
//
foreach (DataColumn dc in dtData.Columns)
{
if (dc.ColumnName.Contains("!;"))
{
TemplateField tField = new TemplateField();
tField.ItemTemplate = new AddTemplateToGridView(ListItemType.Item, dc.ColumnName);
//\\ --- template contain textbox
tField.HeaderText = dc.ColumnName;
GridView1.Columns.Add(tField);
}
}
}
这是我的模板类:
public class AddTemplateToGridView : ITemplate
{
ListItemType _type;
string _colName;
public AddTemplateToGridView(ListItemType type, string colname)
{
_type = type;
_colName = colname;
}
void ITemplate.InstantiateIn(System.Web.UI.Control container)
{
switch (_type)
{
case ListItemType.Item:
TextBox text = new TextBox();
text.ID = "txtAmount";
text.DataBinding += new EventHandler(txt_DataBinding);
container.Controls.Add(text);
break;
}
}
void txt_DataBinding(object sender, EventArgs e)
{
TextBox textBox = (TextBox)sender;
GridViewRow container = (GridViewRow)textBox.NamingContainer;
object dataValue = DataBinder.Eval(container.DataItem, _colName);
if (dataValue != DBNull.Value)
{
textBox.Text = dataValue.ToString();
}
}
}
所以我有一个带有 textboxe 的 gridview 可以立即编辑问题是,当我点击保存按钮“它在 gridview 之外”时,所有 textboxe 都消失了
protected void btnSave_Command(object sender, CommandEventArgs e)
{
for (int nRow = 0; nRow < GridView1.Rows.Count; nRow++)
{
for (int nCol = 0; nCol < GridView1.Columns.Count; nCol++)
{
if (GridView1.Rows[nRow].Cells[nCol].Controls.Count == 0) continue;
//\\ --- Controls.Count always = 0
//\\ --- However each cell contain textbox
//\\ --- textbox disappear after save button clicked
TextBox txt = (TextBox)GridView1.Rows[nRow].Cells[nCol].Controls[0];
}
}
}