如何在Gridview中生成动态文本框和dopdownlist时删除行 [英] How to delete row when generating dynamically textboxes and dopdownlist in Gridview

问题描述

您好，

我通过维护视图状态并将其绑定在gridview中来生成动态文本框和下拉列表。

当我使用LinkBut​​ton Delete删除gridview中的任何行时，删除该行，它删除了它下面的行。这是代码：

  protected   void  LinkBut​​ton1_Click（ object  sender，EventArgs e）
 {
 
 LinkBut​​ton lb =（LinkBut​​ton）sender; 
 GridViewRow gvRow =（GridViewRow）lb.NamingContainer; 
  int  rowID = gvRow.RowIndex +  1 ; 
  if （ViewState [  CurrentTable]！=  null ）
 {
 DataTable dt =（DataTable）ViewState [   CurrentTable]; 
  if （dt.Rows.Count >   1 ）
 {
  if （gvRow.RowIndex <  dt.Rows.Count  -   1 ）
 {
  //  删除选定的行数据 
 dt.Rows.Remove（dt.Rows [rowID]）; 
} 
} 
  //  将当前数据存储在ViewState中以供将来参考 
 ViewState [  CurrentTable] = dt; 
  //  重新绑定GridView以获取更新的数据 
 Gridview1.DataSource = DT; 
 Gridview1.DataBind（）; 
} 
 
 
 SetPreviousData（）; 
} 
 
 
 私有  void  SetPreviousData（） 
 {
 
  int  rowIndex =  0 ; 
  if （ViewState [  CurrentTable]！=  null ）
 {
 DataTable dt =（DataTable）ViewState [   CurrentTable]; 
 
  if （dt.Rows.Count >   0 ）
 {
  for （ int  i =  0 ; i <  dt.Rows.Count; i ++）
 {
 
 DropDownList box1 =（DropDownList）Gridview1.Rows [rowIndex] .Cells [ 1 ]。FindControl（  DROPDOWNLIST1）; 
 box1.DataSource = getitemoutput.DtCategory; 
 box1.DataTextField =   item_name; 
 box1.DataValueField =   store_item_id; 
 box1.DataBind（）; 
 box1.Items.Insert（ 0 ， 选择商店）; 
 TextBox box2 =（TextBox）Gridview1.Rows [rowIndex] .Cells [ 2 ]。FindControl（  TextBox2）; 
 TextBox box3 =（TextBox）Gridview1.Rows [rowIndex] .Cells [ 3 ]。FindControl（  TextBox3）; 
 TextBox box4 =（TextBox）Gridview1.Rows [rowIndex] .Cells [ 4 ]。FindControl（  TextBox4）; 
 TextBox box5 =（TextBox）Gridview1.Rows [rowIndex] .Cells [ 4 ]。FindControl（  TextBox5）; 
 
 box1.Text = dt.Rows [i] [  Column1 ]的ToString（）; 
 box2.Text = dt.Rows [i] [  Column2]。ToString（ ）; 
 box3.Text = dt.Rows [i] [  Column3]。ToString（ ）; 
 box4.Text = dt.Rows [i] [  Column4]。ToString（ ）; 
 box5.Text = dt.Rows [i] [  Column5]。ToString（ ）; 
 
 rowIndex ++; 
} 
} 
} 
 
} 
 

解决方案

< blockquote>从您尝试实施此代码的位置查看此文章：从ASP.NET GridView动态添加和删除行 [ ^ ]



验证它为什么不适合你。

Hello,
I am generating dynamic textboxes and dropdownlist by maintaining the viewstate and bind it in gridview.
When I delete any row from gridview using LinkButton Delete, instead of deleting that row, it deleted the row below it.Here is the code:

protected void LinkButton1_Click(object sender, EventArgs e)
  {

          LinkButton lb = (LinkButton)sender;
          GridViewRow gvRow = (GridViewRow)lb.NamingContainer;
          int rowID = gvRow.RowIndex + 1;
          if (ViewState["CurrentTable"] != null)
          {
              DataTable dt = (DataTable)ViewState["CurrentTable"];
              if (dt.Rows.Count > 1)
              {
                  if (gvRow.RowIndex < dt.Rows.Count - 1)
                  {
                      //Remove the Selected Row data
                      dt.Rows.Remove(dt.Rows[rowID]);
                  }
              }
              //Store the current data in ViewState for future reference
              ViewState["CurrentTable"] = dt;
              //Re bind the GridView for the updated data
              Gridview1.DataSource = dt;
              Gridview1.DataBind();
          }


          SetPreviousData();
      }


private void SetPreviousData()
  {

          int rowIndex = 0;
          if (ViewState["CurrentTable"] != null)
          {
              DataTable dt = (DataTable)ViewState["CurrentTable"];

              if (dt.Rows.Count > 0)
              {
                  for (int i = 0; i < dt.Rows.Count; i++)
                  {

                      DropDownList box1 = (DropDownList)Gridview1.Rows[rowIndex].Cells[1].FindControl("DROPDOWNLIST1");
                      box1.DataSource = getitemoutput.DtCategory;
                      box1.DataTextField = "item_name";
                      box1.DataValueField = "store_item_id";
                      box1.DataBind();
                      box1.Items.Insert(0, "Select store");
                      TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
                      TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");
                      TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("TextBox4");
                      TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("TextBox5");

                      box1.Text = dt.Rows[i]["Column1"].ToString();
                      box2.Text = dt.Rows[i]["Column2"].ToString();
                      box3.Text = dt.Rows[i]["Column3"].ToString();
                      box4.Text = dt.Rows[i]["Column4"].ToString();
                      box5.Text = dt.Rows[i]["Column5"].ToString();

                      rowIndex++;
                  }
              }
          }

  }

解决方案

Check this Article from where you tried to implement this code : Dynamically adding and deleting rows from ASP.NET GridView[^]

Verify why it doesn't work for you.

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