C＃動態GridView/DataTable設置

Question

我正在爲我工​​作的公司完全動態的表上工作。我劈頭蓋臉地讓GridView以我想要的方式工作。

但是他們改變了它有點...

• 我有一個GridView。
• 每一列和行都將是一個TextBox，您可以將數字放入。
• 從1列開始，您可以通過按鈕添加多個列。
• 有固定數量的行（23）。

我試着將文本框添加到下面的數據行中，但它只是顯示TextBox所在的命名空間的字符串。我該怎麼做？我想避免任何ASP的東西，我絲毫不知道它在做什麼

這是我到目前爲止所做的。

DataTable dt = new DataTable(); 
DataColumn dc = new DataColumn("MICRONS",typeof(TextBox)); 

dt.Columns.Add(dc); 

for (int i = 0; i < 23; ++i) 
{ 
    TextBox tb = new TextBox(); 
    DataRow row = dt.NewRow(); 

    row["MICRONS"] = tb; 
    dt.Rows.Add(row); 
} 
foreach (DataColumn col in dt.Columns) 
{ 
    BoundField bField = new BoundField(); 
    bField.DataField = col.ColumnName; 
    bField.HeaderText = col.ColumnName; 
    GridView1.Columns.Add(bField); 
} 

GridView1.DataSource = dt; 

Answer 1

好根據你的問題和我的感覺它似乎你想動態地添加文本框。如果是這樣，然後創建一個類，並在該類寫下面的代碼：

using System; 
using System.Data; 
using System.Configuration; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using System.ComponentModel; 
using System.Collections; 
/// <summary> 
/// Summary description for DynamicTemplate 
/// </summary> 
public class DynamicTemplate : System.Web.UI.ITemplate 
{ 
public String TableName { get; set; } 

System.Web.UI.WebControls.ListItemType templateType; 
System.Collections.Hashtable htControls = new System.Collections.Hashtable(); 
System.Collections.Hashtable htBindPropertiesNames = new System.Collections.Hashtable(); 
System.Collections.Hashtable htBindExpression = new System.Collections.Hashtable(); 

public DynamicTemplate(System.Web.UI.WebControls.ListItemType type) 
{ 
    templateType = type; 
} 

public void AddControl(WebControl wbControl, String BindPropertyName, String BindExpression) 
{ 
    htControls.Add(htControls.Count, wbControl); 
    htBindPropertiesNames.Add(htBindPropertiesNames.Count, BindPropertyName); 
    htBindExpression.Add(htBindExpression.Count, BindExpression); 
} 

public void AddControl(HtmlControl wbControl, String BindPropertyName, String BindExpression) 
{ 
    htControls.Add(htControls.Count, wbControl); 
    htBindPropertiesNames.Add(htBindPropertiesNames.Count, BindPropertyName); 
    htBindExpression.Add(htBindExpression.Count, BindExpression); 
} 

public void InstantiateIn(System.Web.UI.Control container) 
{ 
    PlaceHolder ph = new PlaceHolder(); 

    for (int i = 0; i < htControls.Count; i++) 
    { 
     //clone control 
     Control cntrl = CloneControl((Control)htControls[i]); 

     switch (templateType) 
     { 
      case ListItemType.Header: 
       break; 
      case ListItemType.Item: 
       ph.Controls.Add(cntrl); 
       break; 
      case ListItemType.AlternatingItem: 
       ph.Controls.Add(cntrl); 
       ph.DataBinding += new EventHandler(Item_DataBinding); 
       break; 
      case ListItemType.Footer: 
       break; 
     } 
    } 
    ph.DataBinding += new EventHandler(Item_DataBinding); 
    container.Controls.Add(ph); 
} 
public void Item_DataBinding(object sender, System.EventArgs e) 
{ 
    PlaceHolder ph = (PlaceHolder)sender; 
    GridViewRow ri = (GridViewRow)ph.NamingContainer; 
    for (int i = 0; i < htControls.Count; i++) 
    { 
     if (htBindPropertiesNames[i].ToString().Length > 0) 
     { 
      Control tmpCtrl = (Control)htControls[i]; 

      String item1Value = GetType(htBindExpression[i].ToString(), ri); 

      //Guid value = new Guid(DataBinder.Eval(ri.DataItem, htBindExpression[i].ToString()).ToString()); 
      //String valueString = value.ToString(); 
      //item1Value = item1Value1.ToString(); 

      Control ctrl = ph.FindControl(tmpCtrl.ID); 
      Type t = ctrl.GetType(); 
      System.Reflection.PropertyInfo pi = t.GetProperty(htBindPropertiesNames[i].ToString()); 
      if (pi != null) 
      { 
       pi.SetValue(ctrl, item1Value.ToString(), null); 
      } 
     } 
    } 
} 

private String GetType(String ColumnName, GridViewRow row) 
{ 
    String Result = ""; 
    clsSearch obj = new clsSearch(); 
    // i have set up the table name static as now we require to make search working for macintosh project only. 
    // as per rakesh sir directed. 
    Int32 Type = obj.GetNumberForDataTypeofColumn("tblProperty", ColumnName); 
    switch (Type) 
    { 
     case 1: 
      DateTime dtvalue = (DateTime)DataBinder.Eval(row.DataItem, ColumnName); 
      Result = dtvalue.ToString(); 
      break; 
     case 2: 
      String svalue = (String)DataBinder.Eval(row.DataItem, ColumnName); 
      Result = svalue; 
      break; 
     case 3: 

      break; 
     case 4: 
      Int32 ivalue = (Int32)DataBinder.Eval(row.DataItem, ColumnName); 
      Result = ivalue.ToString(); 
      break; 
     case 5: 
      Guid gvalue = (Guid)DataBinder.Eval(row.DataItem, ColumnName); 
      Result = gvalue.ToString(); 
      break; 
    } 

    return Result; 
} 

private Control CloneControl(System.Web.UI.Control src_ctl) 
{ 
    Type t = src_ctl.GetType(); 
    Object obj = Activator.CreateInstance(t); 
    Control dst_ctl = (Control)obj; 
    PropertyDescriptorCollection src_pdc = TypeDescriptor.GetProperties(src_ctl); 
    PropertyDescriptorCollection dst_pdc = TypeDescriptor.GetProperties(dst_ctl); 

    for (int i = 0; i < src_pdc.Count; i++) 
    { 
     if (src_pdc[i].Attributes.Contains(DesignerSerializationVisibilityAttribute.Content)) 
     { 
      object collection_val = src_pdc[i].GetValue(src_ctl); 
      if ((collection_val is IList) == true) 
      { 
       foreach (object child in (IList)collection_val) 
       { 
        Control new_child = CloneControl(child as Control); 
        object dst_collection_val = dst_pdc[i].GetValue(dst_ctl); 
        ((IList)dst_collection_val).Add(new_child); 
       } 
      } 
     } 
     else 
     { 
      dst_pdc[src_pdc[i].Name].SetValue(dst_ctl, src_pdc[i].GetValue(src_ctl)); 
     } 
    } 

    return dst_ctl; 

} 
} 

確定現在來到方法你在哪裏綁定之前喲指定數據源網格使用下面你綁定電網grid.before指根據您的要求添加文本框的代碼。例如，我添加了一個。

TemplateField t = new TemplateField(); 
    DynamicTemplate mt = new DynamicTemplate(ListItemType.Item); 

    TextBox ibtnEdit = new TextBox(); 
    ibtnEdit.ID = "btnEdit"; 
    ibtnEdit.CssClass = "EditButton"; 
    ibtnEdit.ToolTip = "Name"; 
    mt.AddControl(ibtnEdit, "AlternateText", "Id"); 
    t.ItemTemplate = mt; 
    t.HeaderText = "Activity"; 
    t.HeaderStyle.HorizontalAlign = HorizontalAlign.Left; 
    GridView1.Columns.Add(t); 
    GridView1.DataSource = datatable; 
    GridView1.DataBind(); 

就是這樣。