如何在asp.net中动态地向gridview添加行 [英] How to add rows to gridview dynamically in asp.net

问题描述

我有一个文本框。接受数字字段。取决于文本框中的值，该行数将附加到网格视图。怎么做？

解决方案

示例网格代码：

< asp：gridview id =Gridview1runat =servershowfooter =trueautogeneratecolumns =falsexmlns：asp =＃unknown> 
< columns> 
< asp：boundfield datafield =RowNumberheadertext =Row Number/> 
< asp：templatefield headertext =Header 1> 
< itemtemplate> 
< asp：textbox id =TextBox1runat =server>< / asp：textbox> 
< / itemtemplate> 
< / asp：templatefield> 
< asp：templatefield headertext =Header 2> 
< itemtemplate> 
< asp：textbox id =TextBox2runat =server>< / asp：textbox> 
< / itemtemplate> 
< / asp：templatefield> 
< asp：templatefield headertext =Header 3> 
< itemtemplate> 
< asp：textbox id =TextBox3runat =server>< / asp：textbox> 
< / itemtemplate> 
< footerstyle horizo​​ntalalign =Right/> 
< footertemplate> 
< asp：button id =ButtonAddrunat =servertext =Add New Row> 
 onclick =ButtonAdd_Click/> 
< / asp：button>< / footertemplate> 
< / asp：templatefield> 
< / columns> 
< / asp：gridview> 
 

代码设置初始行

 private void SetInitialRow（）
 {
 DataTable dt = new DataTable（）; 
 DataRow dr = null; 
 dt.Columns.Add（new DataColumn（RowNumber，typeof（string）））; 
 dt.Columns.Add（new DataColumn（Column1，typeof（string）））; 
 dt.Columns.Add（new DataColumn（Column2，typeof（string）））; 
 dt.Columns.Add（new DataColumn（Column3，typeof（string）））; 
 dr = dt.NewRow（）; 
 dr [RowNumber] = 1; 
 dr [Column1] = string.Empty; 
 dr [Column2] = string.Empty; 
 dr [Column3] = string.Empty; 
 dt.Rows.Add（dr）; 
 
 //将DataTable存储在ViewState中
 ViewState [CurrentTable] = dt; 
 
 Gridview1.DataSource = dt; 
 Gridview1.DataBind（）; 
} 
 

添加新行

 private void AddNewRowToGrid（）
 {
 int j = 0; 
 while（j< convert.toint16（txtinputtextvalue.text））> 
 {
 int rowIndex = 0; 
 
 if（ViewState [CurrentTable]！= null）
 {
 DataTable dtCurrentTable =（DataTable）ViewState [CurrentTable]; 
 DataRow drCurrentRow = null; 
 if（dtCurrentTable.Rows.Count> 0）
 {
 for（int i = 1; i< = dtCurrentTable.Rows.Count; i ++）
 {
 //提取TextBox值
 TextBox box1 =（TextBox）Gridview1.Rows [rowIndex] .Cells [1] .FindControl（TextBox1）; 
 TextBox box2 =（TextBox）Gridview1.Rows [rowIndex] .Cells [2] .FindControl（TextBox2）; 
 TextBox box3 =（TextBox）Gridview1.Rows [rowIndex] .Cells [3] .FindControl（TextBox3）; 
 
 drCurrentRow = dtCurrentTable.NewRow（）; 
 drCurrentRow [RowNumber] = i + 1; 
 
 dtCurrentTable.Rows [i  -  1] [Column1] = box1.Text; 
 dtCurrentTable.Rows [i  -  1] [Column2] = box2.Text; 
 dtCurrentTable.Rows [i  -  1] [Column3] = box3.Text; 
 
 rowIndex ++; 
} 
 dtCurrentTable.Rows.Add（drCurrentRow）; 
 ViewState [CurrentTable] = dtCurrentTable; 
 
 Gridview1.DataSource = dtCurrentTable; 
 Gridview1.DataBind（）; 
} 
} 
 else 
 {
 Response.Write（ViewState为null）; 
} 
 
 //在回发上设置先前数据
 SetPreviousData（）; 
 j ++; 
} 
 
} 

txtInputtextValue.text这是你的新行数量的文本框



设置以前的数据

 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 ++）
 {
 TextBox box1 =（TextBox）Gridview1.Rows [rowIndex] .Cells [1] .FindControl（TextBox1）; 
 TextBox box2 =（TextBox）Gridview1.Rows [rowIndex] .Cells [2] .FindControl（TextBox2）; 
 TextBox box3 =（TextBox）Gridview1.Rows [rowIndex] .Cells [3] .FindControl（TextBox3）; 
 
 box1.Text = dt.Rows [i] [Column1]。ToString（）; 
 box2.Text = dt.Rows [i] [Column2]。ToString（）; 
 box3.Text = dt.Rows [i] [Column3]。ToString（）; 
 
 rowIndex ++; 
} 
} 
} 
} 

在页面加载事件中调用初始值方法



调用按钮点击添加新行方法



注意：如果您将来自DB的数据绑定为该数据作为初始值

I have a textbox. which accept numeric field. depending on value in textbox that number of rows are appended to grid view. how to do this ?

解决方案

Sample Grid Code:

<asp:gridview id="Gridview1" runat="server" showfooter="true" autogeneratecolumns="false" xmlns:asp="#unknown">
         <columns>
         <asp:boundfield datafield="RowNumber" headertext="Row Number" />
         <asp:templatefield headertext="Header 1">
             <itemtemplate>
                 <asp:textbox id="TextBox1" runat="server"></asp:textbox>
             </itemtemplate>
         </asp:templatefield>
         <asp:templatefield headertext="Header 2">
             <itemtemplate>
                 <asp:textbox id="TextBox2" runat="server"></asp:textbox>
             </itemtemplate>
         </asp:templatefield>
         <asp:templatefield headertext="Header 3">
             <itemtemplate>
                  <asp:textbox id="TextBox3" runat="server"></asp:textbox>
             </itemtemplate>
             <footerstyle horizontalalign="Right" />
             <footertemplate>
              <asp:button id="ButtonAdd" runat="server" text="Add New Row">
                     onclick="ButtonAdd_Click" />
             </asp:button></footertemplate>
         </asp:templatefield>
         </columns>
     </asp:gridview>

Code to Set initial row

private void SetInitialRow()
  {
      DataTable dt = new DataTable();
      DataRow dr = null;
      dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
      dt.Columns.Add(new DataColumn("Column1", typeof(string)));
      dt.Columns.Add(new DataColumn("Column2", typeof(string)));
      dt.Columns.Add(new DataColumn("Column3", typeof(string)));
      dr = dt.NewRow();
      dr["RowNumber"] = 1;
      dr["Column1"] = string.Empty;
      dr["Column2"] = string.Empty;
      dr["Column3"] = string.Empty;
      dt.Rows.Add(dr);

      //Store the DataTable in ViewState
      ViewState["CurrentTable"] = dt;

      Gridview1.DataSource = dt;
      Gridview1.DataBind();
  }

To Add New Row

private void AddNewRowToGrid()
    {
        int j=0;
        while(j<convert.toint16(txtinputtextvalue.text))>
        {
        int rowIndex = 0;

        if (ViewState["CurrentTable"] != null)
        {
            DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
            DataRow drCurrentRow = null;
            if (dtCurrentTable.Rows.Count > 0)
            {
                for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
                {
                    //extract the TextBox values
                    TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
                    TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
                    TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");

                    drCurrentRow = dtCurrentTable.NewRow();
                    drCurrentRow["RowNumber"] = i + 1;

                    dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;
                    dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;
                    dtCurrentTable.Rows[i - 1]["Column3"] = box3.Text;

                    rowIndex++;
                }
                dtCurrentTable.Rows.Add(drCurrentRow);
                ViewState["CurrentTable"] = dtCurrentTable;

                Gridview1.DataSource = dtCurrentTable;
                Gridview1.DataBind();
            }
        }
        else
        {
            Response.Write("ViewState is null");
        }

        //Set Previous Data on Postbacks
        SetPreviousData();
            j++;
        }
        
    }

txtInputtextValue.text which is your text box for count of new rows

To set previous Data

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++)
                {
                    TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
                    TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
                    TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");

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

                    rowIndex++;
                }
            }
        }
    }

Call the initial value method in page load event

call add new row method at button click

Note: if you bind data from DB Call that data as initial value

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