同事和我无法弄清楚为什么以下代码中的EventHandlers没有被解雇。在加载第一页之前调用该函数两次,并将AutoPostBack设置为true。 lnkbtn
按钮和ddlDose
DropDownList是未被触发的按钮。它回发,但它不会调用事件处理程序。这是一些代码......任何人都可以看到任何内在的错误吗?
的Page_Load:
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
tblMedOrdering = (Table)Session["tblMedOrdering"];
List<string>medNames = (List<string>)Session["medNamesList"];
populateMeds(medNames);
}
}
PopulateMeds:
protected void populateMeds(List<string> medNames)
{
if (medNames.Count == 0)
{
tblMedOrdering = (Table)Session["tblMedOrdering"];
}
else
{
DataSet ds = new DataSet();
string strConn = Application["dbconn"].ToString();
using (SqlConnection dbconn = new SqlConnection(strConn))
using (SqlCommand medDbcmd = dbconn.CreateCommand())
{
dbconn.Open();
for (int i = 0; i < medNames.Count; i++)
{
DropDownList ddlDose = new DropDownList();
DropDownList ddlSig = new DropDownList();
int flag = 0;
if ((Table)Session["tblMedOrdering"] != null)
{
for (int j = 0; j < tblMedOrdering.Rows.Count; j++)
{
if (tblMedOrdering.Rows[j].Cells[3].Text == medNames[i].ToString())
{
flag = 1;
ddlSig = (DropDownList)tblMedOrdering.Rows[i].Cells[2].FindControl(medNames[i].ToString() + "ddlSig");
if (ddlSig == null)
{
ddlSig.ID = medNames[i].ToString() + "ddlSig";
ListItem liDefaultSig = new ListItem();
liDefaultSig.Value = "0";
liDefaultSig.Text = "Select . . .";
ddlSig.Items.Add(liDefaultSig);
}
break;
}
}
}
if (flag != 1)
{
ListItem liDefault = new ListItem();
liDefault.Value = "0";
liDefault.Text = "Select . . .";
ddlDose.Items.Add(liDefault);
ddlSig.Items.Add(liDefault);
ddlDose.ID = medNames[i].ToString() + "ddlDose";
ddlSig.ID = medNames[i].ToString() + "ddlSig";
ddlDose.AutoPostBack = true;
ddlDose.TextChanged += new EventHandler(ddlDose_SelectedIndexChanged);
medDbcmd.CommandText = "Select distinct medorderid, dose from ordertablemeds where medordername = '" + medNames[i].ToString() + "'";
SqlDataReader dr = medDbcmd.ExecuteReader();
if (dr != null)
{
while (dr.Read())
{
ListItem liDose = new ListItem();
liDose.Value = dr["medorderid"].ToString();
liDose.Text = dr["dose"].ToString();
ddlDose.Items.Add(liDose);
}
dr.Close();
}
TableRow tr = new TableRow();
tr.ID = medNames[i].ToString() + "TableRow";
TableCell tcDose = new TableCell();
TableCell tcSig = new TableCell();
TableCell tcRemove = new TableCell();
TableCell tcMedName = new TableCell();
tcDose.Controls.Add(ddlDose);
tcSig.Controls.Add(ddlSig);
tcMedName.Text = medNames[i].ToString();
tcMedName.ID = medNames[i].ToString() + "medname";
LinkButton lnkbtn = new LinkButton();
lnkbtn.Text = "X";
lnkbtn.ForeColor = System.Drawing.Color.Red;
lnkbtn.ID = medNames[i].ToString() + "_lnkbtn" + tblMedOrdering.Rows.Count;
lnkbtn.Click += new EventHandler(Reset_Click);
tcRemove.Controls.Add(lnkbtn);
tr.Cells.Add(tcRemove);
tr.Cells.Add(tcDose);
tr.Cells.Add(tcSig);
tr.Cells.Add(tcMedName);
tblMedOrdering.Rows.Add(tr);
}
}
tblMedOrdering.DataBind();
dbconn.Close();
}
}
Session["tblMedOrdering"] = tblMedOrdering;
if (medNames.Count == 0)
{
cpeMeds.Collapsed = true;
cpeMeds.ClientState = "True";
}
List<string> medNamesList = new List<string>();
DropDownList ddl = new DropDownList();
for (int k = 0; k < tblMedOrdering.Rows.Count; k++)
{
ddl = (DropDownList)tblMedOrdering.Rows[k].Cells[1].FindControl(tblMedOrdering.Rows[k].Cells[3].Text +"ddlDose");
ddl.SelectedIndexChanged += new EventHandler(ddlDose_SelectedIndexChanged);
medNamesList.Add(tblMedOrdering.Rows[k].Cells[3].Text);
}
Session["medNamesList"] = medNamesList;
}
PopulateMeds只是一个在代码隐藏中调用的函数,并且给出了一个字符串名称列表,因此它不需要args就好像它是一个控件(对象发送者,EventArgs e)。
答案 0 :(得分:2)
将该逻辑移至OnInit
并且事件处理程序应该正常运行,假设其他一切都正确。我还会检查以确保您没有验证干扰回发。