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我有两个dropdownlists,选择第一个下拉导致回传和第二个下拉被绑定...为什么选择dropdownlist选项不会导致第二次回发?
- 为什么第一个下拉的选择的价值,再次选择不回发?
编辑:
<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);
}
第一次选择的值回传,同样的选择时第二次不回传...
发布您的代码将非常有用,即您的aspx标记。 – 2010-01-27 12:51:55
您是否将下拉列表的** AutoPostBack **属性设置为true?如果是这样,请向您的问题添加一些代码 – 2010-01-27 12:52:26
您是否尝试过注释掉“ScriptManager.RegisterClientScriptBlock”调用? – RobS 2010-01-27 12:59:30