如何将数据从网格视图文本框中插入数据库 [英] how to insert data from grid view textbox to database

问题描述

我在网格视图中有一个7文本框，但是当我在文本框中输入值并提交时，它显示了未设置为对象实例的错误对象引用..
这是我的代码

i have a 7 textbox in my grid view but when i enter value in textbox and submit then it shows an error object reference not set to an instance of an object..
here is my code

for(int count = 0; count < GridView1.Rows.Count; count++)
    {
        TextBox txt1 = (TextBox)GridView1.Rows[count].FindControl("txt1");
        TextBox txt2 = (TextBox)GridView1.Rows[count].FindControl("txt2");
        TextBox txt3 = (TextBox)GridView1.Rows[count].FindControl("txt3");
        TextBox txt4 = (TextBox)GridView1.Rows[count].FindControl("txt4");

        TextBox txt5 = (TextBox)GridView1.Rows[count].FindControl("txt5");
        TextBox txt6 = (TextBox)GridView1.Rows[count].FindControl("txt6");
        TextBox txt7 = (TextBox)GridView1.Rows[count].FindControl("txt7");
       then i write connection string
           string str;
        str = "insert into leave1(pl,sl,cl,lwp,ot,night,sunday)values('" + txt1.Text + "','" + txt2.Text + "','" + txt3.Text + "','" + txt4.Text + "','" + txt5.Text + "','" + txt6.Text + "','" + txt7.Text + "')";
        SqlCommand cmd = new SqlCommand(str, con);
        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
        GridView1.DataBind();
}

请帮助我....哪里错了

plz help me....where m wrong

推荐答案

对象引用未设置为对象的实例

当您尝试使用属性或调用对象的方法为null时，会发生此错误.更多详细信息:此处 [

Object reference not set to an instance of an object

This error happens when you try to use a property or call a method of an object that is null. More details: here[^]

A simple use of Visual studio DEBUGGER can tell you the object because of which it is happening. Just look at the stack trace and put a debugger on that line. Check the objects of that line and see if any one is null and you are trying to use that objects property. Handle the same.

Out here, the way you have coded, it should have atleast 7 rows of data and they should have textbox controls to be found. You sure it''s 7 rows? Or you have 7 columns and less number of rows? Adjust and check.

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