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我有兩個dropdownlists,選擇第一個下拉導致回傳和第二個下拉被綁定...爲什麼選擇dropdownlist選項不會導致第二次回發?
- 爲什麼第一個下拉的選擇的價值,再次選擇不回發?
編輯:
<asp:DropDownList ID="DLMatName" runat="server" OnSelectedIndexChanged="DlMeasurement_SelectedIndexChanged" AutoPostBack="true">
</asp:DropDownList>
protected void DlMeasurement_SelectedIndexChanged(object sender, EventArgs e)
{
if (DLMatName.SelectedIndex != 0)
{
DataTable dt = _materialInController.GetMeasurementsforMaterials(Convert.ToInt64(DLMatName.SelectedValue.ToString())).Tables[0];
if (dt.Rows.Count > 1)
{
MeasurementTr.Visible = true;
this.DlMeasurement.DataSource = dt;
this.DlMeasurement.DataValueField = dt.Columns[0].ToString();
this.DlMeasurement.DataTextField = dt.Columns[1].ToString();
this.DlMeasurement.DataBind();
this.DlMeasurement.Items.Insert(0, ListItem.FromString("Select"));
this.LblMeasuremet.Visible = false;
ErrorMsg.InnerHtml = "";
}
else if (dt.Rows.Count == 1)
{
this.LblMeasuremet.Visible = true;
this.LblMeasuremet.Text = dt.Rows[0].ItemArray[1].ToString();
MeasurementTr.Visible = false;
ErrorMsg.InnerHtml = "";
}
else
{
}
}
else
{
MeasurementTr.Visible = false;
this.LblMeasuremet.Visible = false;
ErrorMsg.InnerHtml = "Select the materialType";
}
ScriptManager.RegisterClientScriptBlock(DLMatName, typeof(DropDownList), "Hideimage", "HideImageButtonDivforAdd();", true);
}
第一次選擇的值回傳,同樣的選擇時第二次不回傳...
發佈您的代碼將非常有用,即您的aspx標記。 – 2010-01-27 12:51:55
您是否將下拉列表的** AutoPostBack **屬性設置爲true?如果是這樣,請向您的問題添加一些代碼 – 2010-01-27 12:52:26
您是否嘗試過註釋掉「ScriptManager.RegisterClientScriptBlock」調用? – RobS 2010-01-27 12:59:30