c# - c# asp.net listbox中的system.data.datarowview

Question

如何从中继器控件获取实际值到列表框控件，为此我编写了以下代码，但我得到了值 system.data.datarowview ...

protected void BindContriesDropDownList()
{
    SqlCommand objSqlCommand = null;
    strSQL = @"SELECT Country_Name FROM Country_Master";
    objSqlCommand = new SqlCommand(strSQL, objSqlDbComm.SqlConnectionObject);
    objSqlCommand.Parameters.AddWithValue("@paramCountry_Name", ddlSelectCountryName.Text);
    DataTable objDataTable = objSqlDbComm.ExecuteDataTable(objSqlCommand);
    ddlSelectCountryName.DataSource = objDataTable;        
    ddlSelectCountryName.DataBind();
}

Answer 1

您必须指定DataTextField并DataValueField为您的DropDownList

ddlSelectCountryName.DataSource = objDataTable;        
ddlSelectCountryName.DataTextField = "Country_Name"; //here
ddlSelectCountryName.DataValueField = "Country_Name";
ddlSelectCountryName.DataBind();