如何在asp.net中的數據庫中保存多個動態文本框和下拉列表值

如何使用asp.net在數據庫中保存多個動態文本框和下拉列表值？如何在asp.net中的數據庫中保存多個動態文本框和下拉列表值

對於我用下面如下代碼：

public partial class StockEntry : System.Web.UI.Page 
{ 
    protected System.Web.UI.WebControls.DropDownList Ddl_Item; 
    protected System.Web.UI.WebControls.TextBox Txt_Quantity; 
    protected System.Web.UI.WebControls.DropDownList Ddl_Unit; 
    protected System.Web.UI.WebControls.TextBox Txt_Available; 

    protected void Page_Load(object sender, EventArgs e) 
    { 
     if (!Page.IsPostBack) 
     { 
      GoodMasterDetails(); 
      UnitMasterDetails(); 
     } 
    } 

    protected void Button1_Click(object sender, EventArgs e) 
    { 
     if (ViewState["countTimes"] == null) 
     { 
      countTimes = 1; 
     } 
     else 
     { 
      countTimes = Convert.ToInt32(ViewState["countTimes"]); 
     } 

     for (int i = 0; i < countTimes; i++) 
     { 
      Ddl_Item = new DropDownList(); 
      Ddl_Item.ID = "Ddl_Item"; 
      Ddl_Item.Width = 150 + i; 
      Ddl_Item.Style[" margin-right"] = "14px"; 
      Ddl_Item.Style[" margin-left"] = "10px"; 
      BLL_StockEntry BLL = new BLL_StockEntry(); 
      DataTable dt = new DataTable(); 
      dt = BLL.GoodsMasterDetails(); 
      if (dt.Rows.Count > 0) 
      { 
       Ddl_Item.DataSource = dt; 
       Ddl_Item.DataTextField = "GM_NAME"; 
       Ddl_Item.DataValueField = "GM_ID"; 
       Ddl_Item.DataBind(); 
       Ddl_Item.Items.Insert(0, new ListItem("---Select---", string.Empty)); 
      } 

      Txt_Quantity = new TextBox(); 
      Txt_Quantity.ID = "Txt_Quantity" + countTimes; 
      Txt_Quantity.Width = 150 + i; 
      Txt_Quantity.Style[" margin-right"] = "14px"; 
      //Txt_Quantity.Style[" margin-left"] = "0px"; 

      Ddl_Unit = new DropDownList(); 
      Ddl_Unit.ID = "Ddl_Unit" + countTimes; 
      Ddl_Unit.Width = 150 + i; 
      Ddl_Unit.Style[" margin-right"] = "14px"; 
      Ddl_Unit.Style[" margin-left"] = "10px"; 
      BLL_StockEntry BLLL = new BLL_StockEntry(); 
      DataTable dt1 = new DataTable(); 
      dt1 = BLLL.UnitsMasterDetails(); 
      if (dt1.Rows.Count > 0) 
      { 
       Ddl_Unit.DataSource = dt1; 
       Ddl_Unit.DataTextField = "UM_UNITNAME"; 
       Ddl_Unit.DataValueField = "UM_ID"; 
       Ddl_Unit.DataBind(); 
       Ddl_Unit.Items.Insert(0, new ListItem("---Select---", string.Empty)); 
      } 

      Txt_Available = new TextBox(); 
      Txt_Available.ID = "Txt_Available" + countTimes; 
      Txt_Available.Width = 150 + i; 
      Txt_Available.Style[" margin-right"] = "14px"; 
      //Txt_Available.Style[" margin-left"] = "10px"; 

      dvContainer.Controls.Add(Ddl_Item); 
      dvContainer.Controls.Add(Txt_Quantity); 

      dvContainer.Controls.Add(Ddl_Unit); 
      dvContainer.Controls.Add(Txt_Available); 

     } 
     countTimes = countTimes + 1; 

     ViewState.Add("countTimes", countTimes); 
    } 

private void StockEntryBind(string mode) 
    { 
     PL.RESTURENT.PL_StockEntry objpl = new PL.RESTURENT.PL_StockEntry(); 

     objpl.StockEntryId = HiddenField1.Value.ToString(); 

     objpl.Date = DateTime.Parse(txt_date.Text); 

     objpl.Time = txt_time.Text; 

     objpl.Godown = Ddl_Godown.SelectedItem.Text; 

     objpl.Item = Ddl_Items.SelectedItem.Text;//static 

     string str = string.Empty;//dynamic 
     DropDownList ddlitem = (DropDownList)dvContainer.FindControl("Ddl_Item") as DropDownList; 
     str = ddlitem.SelectedItem.Text; 

     objpl.Quantity = Txt_Quantity.Text; 

     objpl.Unit = Ddl_Unit.SelectedItem.Text; 

     objpl.AvailableStock = Txt_Available.Text; 

     objpl.mode = mode; 

     BLL_StockEntry objbll = new BLL_StockEntry(); 
     if (objbll.StockEntryTransaction(objpl)) 
     { 
      ScriptManager.RegisterStartupScript(this, this.GetType(), "", "Alert('Pay Slip Inserted Succesfully...')", true); 
     } 
    }

我只嘗試了（下拉列表）Ddl_Item在數據庫中插入數據，但

str = ddlitem.SelectedItem.Text;

錯誤：Object reference not set to an instance of an object。

我們將非常感謝您的幫助。

我聲明瞭使用動態存儲過程通過模式類型調用按鈕事件的方法。

來源

2013-08-22 Pratik Ray

當你調用StockEntryBind（）？接下來的回傳？ –

嘗試......

((TextBox)Page.Form.FindControl("Your TextBox Id")).Text

來源

2013-08-23 10:16:44

如何在asp.net中的數據庫中保存多個動態文本框和下拉列表值

回答

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