[英]CheckBoxList In GridView Only Remember The First Option Ticked When New Row Added
我有一个带有多列的网格视图,允许用户填写数据,他们可以在填写完数据后添加新行。 在各列之间,有一列带有CheckBoxList的列,我允许用户在CheckBoxList上多次选择该选项,但是每次添加新行时,仅保留用户选择的第一个选项,而其他选择消失。 添加新行时,如何保留用户选择的选项?
private void SetPreviousDataLecturer()
{
int rowIndex = 0;
if (ViewState["LecturerGridView"] != null)
{
DataTable dataTableCurrent = (DataTable)ViewState["LecturerGridView"];
if (dataTableCurrent.Rows.Count > 0)
{
for (int i = 0; i < dataTableCurrent.Rows.Count; i++)
{
TextBox textBoxLName = (TextBox)LecturerGridView.Rows[rowIndex].Cells[1].FindControl("LecturerName");
TextBox textBoxLID = (TextBox)LecturerGridView.Rows[rowIndex].Cells[2].FindControl("LecturerID");
TextBox textBoxLAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[3].FindControl("LecturerAddress");
TextBox textBoxLPNumber = (TextBox)LecturerGridView.Rows[rowIndex].Cells[4].FindControl("LecturerPNumber");
TextBox textBoxLEAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[5].FindControl("LecturerEAddress");
CheckBoxList checkBoxListLCourse = (CheckBoxList)LecturerGridView.Rows[rowIndex].Cells[6].FindControl("LecturerCourse");
TextBox textBoxLPassword = (TextBox)LecturerGridView.Rows[rowIndex].Cells[7].FindControl("LecturerPassword");
LecturerGridView.Rows[i].Cells[0].Text = Convert.ToString(i + 1);
textBoxLName.Text = dataTableCurrent.Rows[i]["LecturerName"].ToString();
textBoxLID.Text = dataTableCurrent.Rows[i]["LecturerID"].ToString();
textBoxLAdd.Text = dataTableCurrent.Rows[i]["LecturerAddress"].ToString();
textBoxLPNumber.Text = dataTableCurrent.Rows[i]["LecturerPNumber"].ToString();
textBoxLEAdd.Text = dataTableCurrent.Rows[i]["LecturerEAddress"].ToString();
checkBoxListLCourse.SelectedValue = dataTableCurrent.Rows[i]["LecturerCourse"].ToString();
textBoxLPassword.Text = dataTableCurrent.Rows[i]["LecturerPassword"].ToString();
rowIndex++;
}
}
}
}
private void AddNewRowToLecturerGV()
{
int rowIndex = 0;
if (ViewState["LecturerGridView"] != null)
{
DataTable dataTableCurrent = (DataTable)ViewState["LecturerGridView"];
DataRow dataRowCurrent = null;
if (dataTableCurrent.Rows.Count > 0)
{
for (int i = 1; i <= dataTableCurrent.Rows.Count; i++)
{
TextBox textBoxLName = (TextBox)LecturerGridView.Rows[rowIndex].Cells[1].FindControl("LecturerName");
TextBox textBoxLID = (TextBox)LecturerGridView.Rows[rowIndex].Cells[2].FindControl("LecturerID");
TextBox textBoxLAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[3].FindControl("LecturerAddress");
TextBox textBoxLPNumber = (TextBox)LecturerGridView.Rows[rowIndex].Cells[4].FindControl("LecturerPNumber");
TextBox textBoxLEAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[5].FindControl("LecturerEAddress");
CheckBoxList checkBoxListLCourse = (CheckBoxList)LecturerGridView.Rows[rowIndex].Cells[6].FindControl("LecturerCourse");
TextBox textBoxLPassword = (TextBox)LecturerGridView.Rows[rowIndex].Cells[7].FindControl("LecturerPassword");
dataRowCurrent = dataTableCurrent.NewRow();
dataRowCurrent["RowNumber"] = i + 1;
dataTableCurrent.Rows[i - 1]["LecturerName"] = textBoxLName.Text;
dataTableCurrent.Rows[i - 1]["LecturerID"] = textBoxLID.Text;
dataTableCurrent.Rows[i - 1]["LecturerAddress"] = textBoxLAdd.Text;
dataTableCurrent.Rows[i - 1]["LecturerPNumber"] = textBoxLPNumber.Text;
dataTableCurrent.Rows[i - 1]["LecturerEAddress"] = textBoxLEAdd.Text;
dataTableCurrent.Rows[i - 1]["LecturerCourse"] = checkBoxListLCourse.SelectedValue.ToString();
dataTableCurrent.Rows[i - 1]["LecturerPassword"] = textBoxLPassword.Text;
rowIndex++;
}
dataTableCurrent.Rows.Add(dataRowCurrent);
ViewState["LecturerGridView"] = dataTableCurrent;
LecturerGridView.DataSource = dataTableCurrent;
LecturerGridView.DataBind();
}
}
else
{
Response.Write("ViewState is null.");
}
SetPreviousDataLecturer();
}
您需要维护所选复选框的状态。 在按钮上单击“添加新行”,首先获取数据表中各行的状态,然后添加空白行,然后填充该数据表。
您还需要维护复选框的选定项目的状态。 您可以将CSV中的选定值获取为:
string selectedItems = String.Join(",",
checkBoxListLCourse.Items.OfType<ListItem>().Where(r => r.Selected)
.Select(r => r.Value));
您可以还原为:
string[] items = selectedItems.Split(',');
for (int i = 0; i < checkBoxListLCourse.Items.Count; i++)
{
if (items.Contains(checkBoxListLCourse.Items[i].Value))
{
checkBoxListLCourse.Items[i].Selected = true;
}
}
我的答案。 这个答案有一些问题,例如当我们在复选框列表中打勾时,复选框列表会自动滚动到最顶部。
private void SetPreviousDataLecturer()
{
int rowIndex = 0;
if (ViewState["LecturerGridView"] != null)
{
DataTable dataTableCurrent = (DataTable)ViewState["LecturerGridView"];
if (dataTableCurrent.Rows.Count > 0)
{
for (int i = 0; i < dataTableCurrent.Rows.Count; i++)
{
TextBox textBoxLName = (TextBox)LecturerGridView.Rows[rowIndex].Cells[1].FindControl("LecturerName");
TextBox textBoxLID = (TextBox)LecturerGridView.Rows[rowIndex].Cells[2].FindControl("LecturerID");
TextBox textBoxLAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[3].FindControl("LecturerAddress");
TextBox textBoxLPNumber = (TextBox)LecturerGridView.Rows[rowIndex].Cells[4].FindControl("LecturerPNumber");
TextBox textBoxLEAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[5].FindControl("LecturerEAddress");
CheckBoxList checkBoxListLCourse = (CheckBoxList)LecturerGridView.Rows[rowIndex].Cells[6].FindControl("LecturerCourse");
TextBox textBoxLPassword = (TextBox)LecturerGridView.Rows[rowIndex].Cells[7].FindControl("LecturerPassword");
LecturerGridView.Rows[i].Cells[0].Text = Convert.ToString(i + 1);
textBoxLName.Text = dataTableCurrent.Rows[i]["LecturerName"].ToString();
textBoxLID.Text = dataTableCurrent.Rows[i]["LecturerID"].ToString();
textBoxLAdd.Text = dataTableCurrent.Rows[i]["LecturerAddress"].ToString();
textBoxLPNumber.Text = dataTableCurrent.Rows[i]["LecturerPNumber"].ToString();
textBoxLEAdd.Text = dataTableCurrent.Rows[i]["LecturerEAddress"].ToString();
checkBoxListLCourse.Text = dataTableCurrent.Rows[i]["LecturerCourse"].ToString();
string lecturerCourse = dataTableCurrent.Rows[i]["LecturerCourse"].ToString();
if (!string.IsNullOrEmpty(lecturerCourse))
{
for (int j = 0; j < lecturerCourse.Split(',').Length; j++)
{
checkBoxListLCourse.Items.FindByValue(lecturerCourse.Split(',')[j].ToString()).Selected = true;
}
}
textBoxLPassword.Text = dataTableCurrent.Rows[i]["LecturerPassword"].ToString();
rowIndex++;
}
}
}
}
private void AddNewRowToLecturerGV()
{
int rowIndex = 0;
if (ViewState["LecturerGridView"] != null)
{
DataTable dataTableCurrent = (DataTable)ViewState["LecturerGridView"];
DataRow dataRowCurrent = null;
if (dataTableCurrent.Rows.Count > 0)
{
for (int i = 1; i <= dataTableCurrent.Rows.Count; i++)
{
TextBox textBoxLName = (TextBox)LecturerGridView.Rows[rowIndex].Cells[1].FindControl("LecturerName");
TextBox textBoxLID = (TextBox)LecturerGridView.Rows[rowIndex].Cells[2].FindControl("LecturerID");
TextBox textBoxLAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[3].FindControl("LecturerAddress");
TextBox textBoxLPNumber = (TextBox)LecturerGridView.Rows[rowIndex].Cells[4].FindControl("LecturerPNumber");
TextBox textBoxLEAdd = (TextBox)LecturerGridView.Rows[rowIndex].Cells[5].FindControl("LecturerEAddress");
CheckBoxList checkBoxListLCourse = (CheckBoxList)LecturerGridView.Rows[rowIndex].Cells[6].FindControl("LecturerCourse");
TextBox textBoxLPassword = (TextBox)LecturerGridView.Rows[rowIndex].Cells[7].FindControl("LecturerPassword");
dataRowCurrent = dataTableCurrent.NewRow();
dataRowCurrent["RowNumber"] = i + 1;
dataTableCurrent.Rows[i - 1]["LecturerName"] = textBoxLName.Text;
dataTableCurrent.Rows[i - 1]["LecturerID"] = textBoxLID.Text;
dataTableCurrent.Rows[i - 1]["LecturerAddress"] = textBoxLAdd.Text;
dataTableCurrent.Rows[i - 1]["LecturerPNumber"] = textBoxLPNumber.Text;
dataTableCurrent.Rows[i - 1]["LecturerEAddress"] = textBoxLEAdd.Text;
string lecturerCourse = string.Empty;
foreach (ListItem item in checkBoxListLCourse.Items)
{
if (item.Selected)
{
if (!string.IsNullOrEmpty(lecturerCourse))
{
lecturerCourse += ",";
}
lecturerCourse += item.Value;
}
}
dataTableCurrent.Rows[i - 1]["LecturerCourse"] = lecturerCourse;
dataTableCurrent.Rows[i - 1]["LecturerPassword"] = textBoxLPassword.Text;
rowIndex++;
}
dataTableCurrent.Rows.Add(dataRowCurrent);
ViewState["LecturerGridView"] = dataTableCurrent;
LecturerGridView.DataSource = dataTableCurrent;
LecturerGridView.DataBind();
}
}
else
{
Response.Write("ViewState is null.");
}
SetPreviousDataLecturer();
}
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