我的动态ddl selectindexchanged没有触发 [英] my dynamic ddl selectindexchanged is not firing

问题描述

大家好，



我的动态控制ddl selectindexchanged没有触发。下面是我的代码。

Hi All,

My dynamic control ddl selectindexchanged is not firing. below is my code.

public void LoadControlData(System.Web.UI.WebControls.Table t, bool IsPostBack, params object[] parameters)
        {
            DataTable dt1 = new DataTable();
            DataTable dt2 = new DataTable();
            IReportData reportInputData = new FieldAuditActivityForDistrictsReportData();
            DataSet ds = reportInputData.GetReportInputData();

            if (IsPostBack == true)
            {
                DropDownList ddlTaxType = (DropDownList)t.FindControl("ddlRegionID");
                ddlTaxType.AppendDataBoundItems = true;
                ddlTaxType.Items.Insert(0, "");
                ddlTaxType.SelectedIndex = 0;
                ddlTaxType.DataSource = ds.Tables[0];
                ddlTaxType.DataTextField = "RegionName";
                ddlTaxType.DataValueField = "RegionID";
                _regionID =ddlTaxType.DataValueField;
                ddlTaxType.DataBind();

                //DropDownList ddlAuditors = (DropDownList)t.FindControl("ddlOfficeID");
                //ddlAuditors.AppendDataBoundItems = true;
                //ddlAuditors.Items.Insert(0, "");
                //ddlAuditors.SelectedIndex = 0;
                //ddlAuditors.DataSource = ds.Tables[1];
                //ddlAuditors.DataTextField = "OfficeName";
                //ddlAuditors.DataValueField = "OfficeID";
                //ddlAuditors.DataBind();
            }

            _tableHold = t;

            _lbuttoned = (LinkButton)t.FindControl("lbuttonEndDateID");
            _ddlRegion = (DropDownList)t.FindControl("ddlRegionID");
            Calendar cldred = (Calendar)t.FindControl("cldrEndDateID");
            _lbuttoned.Click += new EventHandler(lbuttoned_Click);   
            cldred.SelectionChanged += new EventHandler(cldred_SelectionChanged);
            cldred.VisibleMonthChanged += new MonthChangedEventHandler(cldred_VisibleMonthChanged);
            cldred.Visible = false;
            _ddlRegion.SelectedIndexChanged += new EventHandler(ddlRegion_SelectedIndexChanged);
            //_ddlRegion.SelectedIndexChanged += new EventHandler(ddlRegion_SelectedIndexChanged);
        }



public void ddlRegion_SelectedIndexChanged(object sender, EventArgs e)
        {
            DataRow dr = null;            
            IDataAccess da = DataAccessFactory.Create("ATS");
            List<idbdataparameter> pars = new List<idbdataparameter>();
            IDbDataParameter param1 = new SqlParameter(DataConstants.DataConstants.REGION_ID,_regionID);
            pars.Add(param1);

            SqlDataReader reader = (SqlDataReader)da.ExecuteReader(ProcedureConstants.FIELD_AUDIT_ACTIVITY_FOR_DISTRICTS_DISTRICTS_INPUT, ref pars, true);

            DataTable dt = new DataTable();

            DataColumn dc1 = new DataColumn("officeid");
            DataColumn dc2 = new DataColumn("officename");


            dt.Columns.Add(dc1);
            dt.Columns.Add(dc2);

            while (reader.Read())
            {
                dr = dt.NewRow();
                dr[dc1] = reader["officeid"];
                dr[dc2] = reader["officename"];
                dt.Rows.Add(dr);
            }

            DataSet ds = new DataSet();
            ds.Tables.Add(dt);
            
            //DropDownList ddlTaxType = (DropDownList)t.FindControl("ddlRegionID");
            //ddlTaxType.AppendDataBoundItems = true;
            //ddlTaxType.Items.Insert(0, "");
            //ddlTaxType.SelectedIndex = 0;
            //ddlTaxType.DataSource = ds.Tables[0];
            //ddlTaxType.DataTextField = "RegionName";
            //ddlTaxType.DataValueField = "RegionID";
            //_regionID = ddlTaxType.DataValueField;
            //ddlTaxType.DataBind();
        }

你有什么想法。



提前付款



Shafik

do you have any idea.

Thanks in advance

Shafik

推荐答案

创建下拉列表时将autopostback属性设置为true

set autopostback property to true while creating your dropdown

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