我如何在GridView中读取动态创建的文本框 [英] How can i read a dynamically created textbox in gridview

问题描述

我在OnRowDataBound中添加了一些动态的文本框，当我尝试获取该值时，我得到的是null.

这是我的代码

I am adding few textbox dynamic in OnRowDataBound and when i try getting the value then i am getting null.

Here is my code

protected void Gridview1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        int columnValue = Convert.ToInt32(ViewState["CountColumnValue"].ToString());
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            for (int i = 1; i <= columnValue; i++)
            {
                TextBox myTextBox = new TextBox();
                myTextBox.ID = "myTextBox" + (i).ToString();
                e.Row.Cells[i].Controls.Add(myTextBox);
            }
        }
    }


protected void btnEnter_Click(object sender, EventArgs e)
    {
        ViewState["CountColumnValue"] = txtNumber.Text;
        SetInitialRow();
    }

private void SetInitialRow()
    {
        DataTable dt = new DataTable();
        DataRow dr = null;
        dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));

        int columnValue = Convert.ToInt32(ViewState["CountColumnValue"].ToString());

        for (int i = 0; i < columnValue; i++)
        {
            dt.Columns.Add(new DataColumn("Column" + i, typeof(string)));
        }
        dr = dt.NewRow();
        dr["RowNumber"] = 1;

        for (int j = 0; j < columnValue; j++)
        {
            dr["Column" + j] = string.Empty;
        }
        dt.Rows.Add(dr);

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

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

protected void btnResult_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < Gridview1.Rows[0].Cells.Count; i++)
        {
            GridViewRow grd = Gridview1.Rows[0];
            string str = (grd.Cells[1].FindControl("myTextBox1") as TextBox).Text;
        } 
    }

推荐答案

更改您所在国家/地区的固定索引

旧

chang eyour fix index in cells to your country

old

(grd.Cells[1].FindControl("myTextBox1") as TextBox).Text;

新

new

(grd.Cells[i].FindControl("myTextBox" + i) as TextBox).Text;

变化
*单元格[1]至单元格[i]
*从"myTextBox1"到"myTextBox" + i

changes
* Cells[1] to Cells[i]
* "myTextBox1" to "myTextBox" + i

请尽快给我答案.

在填充网格时，应添加此内容rowdatabound事件中出现这种情况，因为第一次rowdatabound以-ve索引值运行.

When your populate your grid you should add this condition in your rowdatabound event because 1st time rowdatabound runs with -ve index value.

if (e.Row.RowIndex != -1)
{
}

然后尝试执行此操作以从文本框中获取值:

and then try doing this for getting the values from the textboxes:

Foreach(Datarow dr in Gridview1.Rows)
{
    TextBox txtDummy = new TextBox;
    txtDummy = (TextBox)e.Row.FindControl("textBoxID goes here"));
    string dummy = txtDummy.text;
}

对于ID，请参见页面的源代码，并查看其为您的动态文本框生成的id，它应该类似于" Gridview1_ctl02_textboxname_textbox"

For ID see the source of the page and see whats the id its generating for your dynamic textboxes, it should be something like "Gridview1_ctl02_textboxname_textbox"

这篇关于我如何在GridView中读取动态创建的文本框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！