請參見下面的代碼:丟失動態創建的文本框的值
protected void btnAddField_click(Object sender, EventArgs e) {
int FieldCount = 0;
if (ViewState["FieldCount"] != null)
{
FieldCount = (int)ViewState["FieldCount"];
}
Table tbl = new Table();
if (Session["DynamicTable"] != null)
{
tbl = (Table)Session["DynamicTable"];
}
CheckBox chkNewField = new CheckBox();
chkNewField.ID = "chkNewField" + FieldCount.ToString();
chkNewField.Checked = true;
Label LblNewLabel = new Label();
LblNewLabel.ID = "lblNewLabel" + FieldCount.ToString();
LblNewLabel.Text = "New Lable";
TextBox TxtNewLabel = new TextBox();
TxtNewLabel.ID = "TxtNewLabel" + FieldCount.ToString();
Label LblNewValue = new Label();
LblNewValue.ID = "lblNewValue" + FieldCount.ToString();
LblNewValue.Text = "New Value";
TextBox TxtNewValue = new TextBox();
TxtNewValue.ID = "TxtNewValue" + FieldCount.ToString();
TableRow tRow = new TableRow();
TableCell tCell1 = new TableCell();
TableCell tCell2 = new TableCell();
tCell2.Attributes.Add("class", "medium");
TableCell tCell3 = new TableCell();
tCell3.Attributes.Add("class", "medium");
TableCell tCell4 = new TableCell();
TableCell tCell5 = new TableCell();
tCell5.Attributes.Add("class", "medium");
TableCell tCell6 = new TableCell();
tCell6.Attributes.Add("class", "medium");
tCell1.Controls.Add(chkNewField);
tCell2.Controls.Add(LblNewLabel);
tCell3.Controls.Add(TxtNewLabel);
tCell4.Controls.Add(new LiteralControl(""));
tCell5.Controls.Add(LblNewValue);
tCell6.Controls.Add(TxtNewValue);
tRow.Cells.Add(tCell1);
tRow.Cells.Add(tCell2);
tRow.Cells.Add(tCell3);
tRow.Cells.Add(tCell4);
tRow.Cells.Add(tCell5);
tRow.Cells.Add(tCell6);
tbl.Rows.Add(tRow);
placeHolderTable.Controls.Remove(tbl);
placeHolderTable.Controls.Add(tbl);
Session["DynamicTable"] = tbl;
FieldCount++;
ViewState["FieldCount"] = FieldCount;
}
protected void BtnPublish_click(object sender, EventArgs e) {
TextBox tb = (TextBox)placeHolderTable .FindControl("TxtNewLabel1");
}
動態添加字段都工作正常。但
- 我在文本框中清除每個輸入值後回來
- 我無法從文本框中獲取的值。
請幫幫我。 在此先感謝, Manu
沒有聲明爲「TxtNewLabel1」 –