GridView行不更新，從GridView中的文本框中的文本編輯模板不來

Question

我有網格視圖，其中我想更新行，但它沒有發生。數據源是一個DataTable。請幫忙。

下面是標記

<asp:GridView ID="GrdV" runat="server" AutoGenerateColumns="false" 
    OnRowEditing="GrdV_RowEditing" OnRowUpdating="GrdV_RowUpdating"> 

<Columns> 
    <asp:TemplateField HeaderText="Clip Description"> 
     <ItemTemplate> 
      <asp:Label ID="lblDescrptn" runat="server" Text='<%# Bind("Description") %>'> 
      </asp:Label> 
     </ItemTemplate> 
     <EditItemTemplate> 
      <asp:TextBox ID="descTbx" runat="server" Text='<%# Bind("Description") %>'> 
      </asp:TextBox> 
     </EditItemTemplate> 
    </asp:TemplateField> 

    <asp:CommandField ShowEditButton="True" /> 

</Columns> 

，這背後是

protected void GrdV_RowUpdating(object sender, GridViewUpdateEventArgs e) 
    { 

     // Retrieve the row being edited. 
     int index = GrdV.EditIndex; 
     GridViewRow row = GrdV.Rows[index];   
     TextBox t1 = row.FindControl("descTbx") as TextBox; 

     DataTable dt = (DataTable)Session["tmdataTable"]; 

     dt.Rows[index]["Description"] = t1.Text; //Description is a column of my DataTable 
     dt.AcceptChanges(); 
     GrdV.EditIndex = -1; 
     GrdV.DataSource = dt; 
     GrdV.DataBind(); 

    } 

在調試代碼，我發現文本框被傳遞空字符串t1.Text =""即使我已經填寫文本框用新值。 我認爲錯誤是本着

TextBox t1 = row.FindControl("descTbx") as TextBox; 

pageLoad的代碼

protected void Page_Load(object sender, EventArgs e) 
    { 

     if (!IsPostBack) 
     { 
      GrdV.DataSource = Session["tmdataTable"]; 
      GrdV.DataBind(); 
     } 


     DataTable Finaldt = getTable(); 

     GrdV.DataSource = Finaldt; 
     GrdV.DataBind(); 
     Session["tmdataTable"] = Finaldt; 

    } 

Answer 1

改變你的代碼位和檢查。更改EditIndex到e.RowIndex

protected void GrdV_RowUpdating(object sender, GridViewUpdateEventArgs e) 
{ 
    GridViewRow row = GrdV.Rows[e.RowIndex]; // this line is changed  
    TextBox t1 = row.FindControl("descTbx") as TextBox; 

    DataTable dt = (DataTable)Session["tmdataTable"]; 

    dt.Rows[row.DataItemIndex]["Description"] = t1.Text; //Description is a column of my DataTable 
    dt.AcceptChanges(); 
    GrdV.EditIndex = -1; 
    GrdV.DataSource = dt; 
    GrdV.DataBind(); 
} 

你這樣做：

protected void Page_Load(object sender, EventArgs e) 
{  
    if(!IsPostBack) 
    { 
     GrdV.DataSource = Session["tmdataTable"]; 
     GrdV.DataBind(); 
    } 
} 

Answer 2

protected void GrdV_RowUpdating(object sender, GridViewUpdateEventArgs e) 
    { 
     if (e.Item is GridDataItem) 
     { 
     // Retrieve the row being edited. 
     int index = GrdV.EditIndex; 
     GridViewRow row = GrdV.Rows[index];   
     TextBox t1 = row.FindControl("descTbx") as TextBox; 

     DataTable dt = (DataTable)Session["tmdataTable"]; 

     dt.Rows[index]["Description"] = t1.Text; //Description is a column of my DataTable 
     dt.AcceptChanges(); 
     GrdV.EditIndex = -1; 
     GrdV.DataSource = dt; 
     GrdV.DataBind(); 
     } 
    } 

Answer 3

EditIndex不可用，你從GridViewUpdateEventArgs

// Retrieve the row being edited. 
DataTable dt = (DataTable)Session["tmdataTable"]; 
GridViewRow row = GrdV.Rows[e.RowIndex]; 
TextBox t1 = row.FindControl("descTbx") as TextBox; 

dt.Rows[row.DataItemIndex]["Description"] = t1.Text; //Description is a column of my DataTable 
dt.AcceptChanges(); 
GrdV.EditIndex = -1; 
GrdV.DataSource = dt; 
GrdV.DataBind();